Welding Technology

One should never operate arc welding equipment while

• Standing on wet or damp floors
• In poorly lighted areas
• Someone is standing near by
• In a confined area with proper ventilation

Acetylene can be used with an oxyfuel cutting tip?

• True
• False

Store cylinders on _____ flooring only.

• fireproof

The chemical composition of the weld metal deposited by a C-Mn steel MMA electrode is usually controlled by:

• Core wire composition
• Additions in the flux coating
• Iron powder in the flux coating
• Dilution from the base material

Oxygen should be _____ with the valve end up.

• Used and stored
• Stored

The current/polarity used for TIG welding of all materials except aluminum and magnesium is:

• DC negative
• DC positive
• AC
• Square wave AC

A burn that causes the skin to blister is referred to as a

• First degree burn
• Second degree burn
• Third degree burn
• Fourth degree burn

Never arc weld or operate electrical equipment while standing _____.

• On wet floors
• In poorly lit areas
• Water
• Semi closed

In a transverse tensile test brittleness would be indicated if:

• There is a reduction in cross-section at the position of fracture
• The fracture surface is flat and featureless but has a rough surface
• Fracture occurred in the weld metal
• The fracture face shows beach marks

The inclusion rate an inductance in the welding circuit when using the MIG/MAG welding process is to:

• Control the rate of spatter in the dip transfer mode
• It enable the welder to weld in position with the spray transfer mode
• It allows for thicker filler wires to be used(2.6-3.6mm diameter)
• It allow full control over droplet size in the spray transfer mode

1. Remove stub ends immediately after welding; do not leave an electrode ________ with a stub end in it.

• Storage
• Holder
• Machine
• Box

Fuel gas fittings are equipped with left-hand threads.

• True
• False

Areas that have less than__________ cubic feet per welder, or that have ceilings less than 16 feethigh, require forced ventilation.

• 8,000
• 4,000
• 10,000
• 12,000

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

A confined space is one that

• Has a flammable atmosphere
• Has an unrestricted means of entry or exit for employees
• Is designed for continuous employee occupancy
• Is large enough that a person can enter and perform tasks

_____ oxygen cylinders have a double wall construction to help maintain a vacuum, and such cylinders should be handled with extreme care.

• Liquid
• Refrigerated

Cylinders shall be moved by tilting and _____ them on their bottom edges.

• Rolling
• Bouncing

The arc flash from an arc welding station is clearly visibleto people who have to walk to the shop office.

• People should be directed to take another route.
• People should be given shaded lens safety glasses
• A protective curtain should be put up around the welding area to block arc flash
• All of the above

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

Which of thefollowing is the only acceptable method for lighting oxyfuel torches?

• Matches
• Cigarette lighter
• Welding arc
• Striker

Always wear suitable protective clothing and _____.

• Eye protection
• Ear plugs
• Gloves
• Boots

If welding travel speed is doubled but the current and voltage remain the same the heat input will be:

• Reduced by 50%
• Increased by a factor of two
• About the same
• Reduced by approximately 25%

Which of the following best describes a semi-automatic welding process?

• The welder is responsible for the maintaining the arc gap and travel speed
• The welder is responsible for travel speed only;arc gap is kept constant by the welding plant
• Both travel speed and arc gap is controlled by the welding plant
• All of above

Thebenefit of copper coated electrode wires is

• Better arc starts
• Increased contact tip life
• Improved wire feeding
• All of the above

10. When welding is done near other ___________, screens should be used to protect their eyes from the arc or reflected glare.

• Animals
• Personnel or students
• Computers
• Plants

Safety glasses are not required when welding with the helmet down.

• True
• False

The area identified at position 10 is the?

• Square edge butt joint
• Double V butt joint
• Single V butt joint
• T butt fillet weld

Both propane and MPS cylinders should be used and stored in the upright position.

• True
• False

What is the indication at position 8 and would you accept or reject the indication to the given acceptance levels?

When considering hydrogen,which of the following welding process would produce the lowest levels in the completed weld (under controlled conditions)?

• MMA
• SAW
• TIG
• FCAW

For a welding job that poses the danger that flying sparks and metal might fall on a welder's legs, what could make the situation safer?

• Wear heavy leather boots that reach above the ankle and pants without cuffs.
• Wear welding gloves.
• Wear a welding jacket.
• All of the above

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Which of the following is correct about safety colors:

• Safe = Green; Danger = Red; Caution = Yellow; Warning = Orange
• Safe = Yellow; Danger = Orange; Caution = Red; Warning = Green
• Safe = Green; Danger = Orange; Caution = Green; Warning = Yellow
• Safe = Green; Danger = Red; Caution = Orange; Warning = Yellow

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

Never operate _____ equipment

• Old
• Ungrounded
• Grounded
• New

Because they _____, some nonflammable shielding gases such as argon, nitrogen, carbon dioxide, and helium should be stored in well ventilated areas.

• Are potentially explosive
• Can displace oxygen in the air

What is the indication at position 10 and would you accept or reject the indication to the given acceptance levels?

Do not wear eye protection with plastic lenses.

• True
• False

What is the indication at position 2 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

In TIG welding, what is the benefit of a current slope-out device?It reduces...

• Tungsten spatter
• Risk of crater cracking
• Risk of arc strikes
• Interpass temperature

One should never touch an electrode to a metal surface other than the workpiece because those surfaces may become electrically live.

• True
• False

As long as they are secure, fuel cylinders can be stored on their side.

• True
• False

Valve protection caps _____ be used for lifting cylinders.

• Shall
• Shall not

What is the indication at position 1 and would you accept or reject the indication to the given acceptance levels?

An MMA electrode classified as E7018 is:

• A basic low hydrogen electrode containing iron powder
• A rutile electrode containing iron powder
• A cellulose electrode suitable for welding in all positions
• A basic electrode depositing weld metal with yield strength af a least 70,000 psi
• Both a and d

Always respect gas cylinders as _____.

• Dangerous
• Expensive
• None
• Inexpensive

Image: https://www.proprofs.com/quiz-school/upload/yuiupload/124933835.jpg

• Fixed shade lens welding helmet
• Flip-front welding helmet
• Auto darkening welding helmet
• None of the above

When considering thermal cutting local hardening can be reduced by:

• Increasing the cutting speed
• The use propane as a fuel gas
• Pre heating the material to be cut
• All of the above

In all cases, shielding gases should be used and stored in _____ position.

• A horizontal
• An upright

All accidents and injuries, no matter how slight, must be:

• Ignored
• Reported to the high school office
• Reported to the instructor immediately
• None of the above

Longhair, loose-fitting clothes, and ties are personal safety hazards aroundrotating equipment.

• True
• False

Compressed air may be used to clean sawdust off the ground:

• Only when you are the only one in the shop
• If no-one is looking
• As long as everyone is wearing safety glasses and dressed safely
• Never

In GMAW, the amperageis controlled by adjusting the

• Voltage
• Wire feed speed
• Wattage
• Arc length

The area identified at position 2 is the?

• Fusion zone
• Fusion boundary
• Toe of the weld
• Undercut

When not in use, an electrode holder, GTAW torch or MIG gun should not be placed in contact with a grounded metal surface.

• True
• False

Which of the following us the best way to identify hydrogen controlled electrodes for the MMA welding process?

• The colour of the flux covering
• The electrodes classification code on box
• The electrodes classification code on stamped on to the electrode
• The electrode trade/manufacturers name
• All of the above

The surface of a fatigue crack will:

• Be rough and torn
• Have sharp chevron markings
• Be smooth
• Have shear lips

When considering the tungsten arc welding process what is the purpose of the down-slope (slope -out)control?

• Ensure good penetration
• To prevent the arc striking on the parent material
• To help prevent the formation of crater pipe and possible cracking
• To help prevent tungstan inclusion during welding

For a given voltage and current setting on an MMA welding plant, when the arc length is shortened , which of them will be most affected?

• The current will increase
• The current will decrease
• The voltage will decrease
• The voltage will increase

When considering the MIG/MAG welding process which of the following metal transfer modes would be the best suited to the welding of thick plates over 25mm, flat welding position:

• Dip transfer
• Pulse transfer
• Spray transfer
• Globular transfer

Mechanized OFC is commonly referred to as a track burner?

• True
• False

The area identified at position 3 is the?

• Fusion boundary
• Acid marks
• Polished area
• Heat affected zone

Only safety glasses need to be worn when grinding, chipping, cutting, or shaping metal with power tools.

• True
• False

Whichoxyacetylene flame has an excess of fuel?

• Oxidizing
• Neutral
• Carburizing
• None of the above

Natural gas in cylinders should be handled with the same precautions as all other fuel gas cylinders.

• True
• False

What is the indication at position 1 and would you accept or reject the indication to the given acceptance levels?

Oxygen cylinders should be protected against excessive _____.

• Cold
• Temperature rises

A Hydrogen controlled MMA electrode can always be recognized by the:

• EN code letter (or AWS code number)
• Electrode length
• Trade name
• Color of the covering

What is the indication at position 8 and would you accept or reject the indication to the given acceptance levels?

Which of the following electrode types is classified as BS EN 499?

• E 38 3 R
• E 6013
• E 7018 - G
• E 51 33 B

When using a fire extinguisher to extinguish a fire, it should be

• Pointed at the base of the fire
• Moved up and down to cool the flames
• Pointed at the top of the flames
• Held within 6 inches of the flame

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

Pipe bores of some materials must be purged with argon before and during TIG welding in order to:

• Prevent linear porosity
• Prevent burn-through
• Prevent oxidation of the root bead
• Eliminate moisture pick-up in the root bead.

Make sure water-cooled systems have water turned off when shutting down.

• True
• False

What is the indication at position 1 and would you accept or reject the indication to the given acceptance levels?

What type of fire extinguisher should be used on electrical fires?

• Class A
• Class B
• Class C
• Class D

Vaporized metals such as zinc, cadmium, lead, chromium, and beryllium

• Are hazardous
• Can be ignored
• Are highly flammable
• May cause slag inclusions

Acetylene cylinders should never be operated while lying on their side because acetone could be drawn into the valve, regulator and hose.

• True
• False

A fully charged oxygen cylinder containsapproximately 225 psi at 70° F.

• True
• False

When welding with the MIG welding process using pure argon as the shielding gas on carbon steel, which of the following problems are likely to occur?

• Copper inclusion and excessive cap heights
• Excessive root penetration and porosity
• Slag inclusion and crater pipe
• Lack of fusion and poor cap profiles

What type of weld would you do to form a T shape between two pieces of flat bar?

• Butt
• Fillet
• Edge
• Outside Corner

An arc strike (stray flash) on a steel component is regarded by some codes as unacceptable because:

• It will cause copper contamination
• It may cause hard spots
• It may give cracking
• Both B and C

The toughness and yield strength of steel is reduced by:

• Reducing the grain size
• Increasing the heat input
• Reducing the heat input
• Both a and b

In a semi-automatic welding process, which of the following shielding gas/gas mixtures would normally give the deepest penetration on steel?

• 100% argon
• 100% CO2
• 75% argon +25% CO2
• All of the above would give the same depth in penetration

If an excessive amount of preheat is used when making an oxyfuel cut, the?

• Cutting stream may gouge the side of the cut
• Top edge may be melted or removed
• Cut may be incomplete
• Sides of the kerf may be dished

What is the indication at position 8 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

Acetylene has a very narrow flammable range.

• True
• False

What is the ratio between the leg length and design throat thickness on mitre fillet weld with equal leg lengths?

• 1 to 1
• 2 to 1
• 1.414 to 1
• All of the above it depend upon the leg length size

You are working with a GTAW machine that has a 20 percent duty cycle. You estimate the welding job will take at least 30 minutes. You know to:

• Operate the machine for 6 minutes, then let it cool for 6 minutes.
• The duty cycle will cover the entire time span so just complete the weld and be done with it.
• Operate the machine no more than 2 minutes out of each 10 minute period.

What type of respiratory protection is the minimum required when welding?

• Dust mask
• P2 Respirator
• No protection is required.
• Hazmat suit

Never weld, cut, or grind near _____.

• Fellow workers
• Flammable materials
• Both 1 and 2
• Neither 1 nor 2

The selection of a correct lens shade number depends on the

• Brightness of the sun in the area
• Type of shielding gas being used
• Amount of welding current being used
• Filler metal being used

Cylinder inspection requirements are regulated by the Department of__________.

• Commerce
• Metalurgy
• Transportation
• War
• Agriculture

What is an "inert gas" as used in Metal Inert Gas (MIG) Welding?

• A gas that cools the weld zone to prevent cracking.
• A gas that prevents porosity by burning a hot neutral flame.
• A gas that does not chemically react with other elements to help produce a quality weld.
• A gas that heats up the weld zone to create a better quality weld.

Safety glasses need to be worn:

• At all times in the shop
• Only when grinding, chipping, cutting, or shaping metal.
• Only if someone is working in the shop
• Only if you don't already wear glasses

In order to reduce waste and control cost,you should weld until the electrode is

• One half inch from the core wire
• Down to the core wire
• Four (4) inches form the core wire
• Down to the classification numbers

Acetylene cylinders should be protected against extreme temerature rises.

• True
• False

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

When clean-up is called, all scrap metal should be:

• Swept or dropped onto the floor
• Left in the booth or on the project you are working on
• Put in a scrap barrel while wearing gloves
• Left for the next class to worry about because it will be cool by then

You notice that MMA electrodes with the flux covering removed are being used as filler rods for TIG welding. This should not be allowed because:

• It is wasteful
• The rod diameter may be too large
• The weld metal composition may be wrong
• The rod is too short

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Never enter the welding shop without wearing _____.

• Safety glasses
• Welding helmet
• Welding clothes
• None of the above

You are working with a GTAW welding machine that has a duty cycle of only 10 percent. You know to:

• Increase amperage to accomplish more welding in a shorter time.
• Pay careful attention to the actual time you spend welding.
• Stop every ten minutes to let the machine cool down.

What is the term for the width of the cut produced by any cutting process?

• Drag line
• Kerf
• Wraparound
• Slag

While flame cutting, the preheat flames (with the cutting jets open) should be?

• Carborizing
• Oxidizing
• Neutral
• Reducing

Oneshould never enter a welding shop without wearing

• Gloves
• Safety glasses
• A welding helmet
• Welding leathers

Which of the following is the most likely to be considered an essential variable for a welder qualification test?

• A change from an electrode classified to BS EN 499 as an E46 3 INI B to an electrode classified to AWS A5.1 as an E7018
• A change of pipe wall thickness by at least 15 mm
• A change in pre-heat temperature from 50°C to 100°C
• A change from PC welding position to PA welding position
• All of the above

Use welding cable covers.

• True
• False

Why shouldn't you wear nylon clothing when welding?

• Because you will get too sweaty.
• It is fine to wear.
• Because static electricity can build up cause shocks.
• Because it can catch fire easily and melt to your skin.

Abutane or propane cigarette lighter is safe around welding equipment as long asit is kept in one's pocket.

• True
• False

According to AWS 2.4 a weld symbol for the other side is placed:

• Above the dashed line
• Below the dashed line
• Above the solid line
• Below the solid line

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

In order to maintain production, it is acceptable to operate welding equipment beyond its rated capacity.

• True
• False

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

Always keep a safe, _____ work area.

• Open
• Clean
• Closed
• As it is

Report any breakage or damage to tools, instruments, or machinery:

• To no-one, just fix it. You might get in trouble
• To the instructor when everyone leaves so no-one thinks you did it
• To the instructor immediately
• To a friend and then fix it together

Fuel gas fittings are equipped with left handthreads.

• True
• False

What would be a typical appearance of a ductile fracture surface?

• Rough randomly torn and a reduction in area
• Smooth fracture surface displaying beach marks
• Step like appearance
• Bright crystalline fracture with very little reduction in area
• Both a and b

Flash burn is

• Another name for a severe sunburn
• A burn caused by the welding arc coming in contact with bare skin
• A burn to the eye caused by exposure to ultraviolet light from the welding arc
• Damage to equipment and clothing due to the extreme heat of the welding arc

Gas cylinders must be chained or secured at all times.

• True
• False

Federal regulation requires that hazardous information about a product be provided to all users of that product. The form used to provide this information is called a(n)

• Information Form (IF)
• Hazardous Information Sheet (HIS)
• Occupational Safety and Hazard Form (OSHF)
• Material Safety Data Sheet (MSDS)

Of the following, which is not a requirement for the SMAW process?

• Electricity
• Gas supply
• Base metal
• Filler metal

Contact lenses can be melted to the cornea of the eye by electric arcs or sparks.

• True
• False

Which of the following steels is considered non-magnetic?

• 18% Cr, 8% Ni
• 2.25Cr 1Mo
• 9%Cr, 1Mo
• 9%Ni

The three main types of MMA electrodes used for welding C and C-Mn steels are:

• Basic, cellulosic and rutile
• Neutral, cellulosic and rutile
• Basic, cellulosic and neutral
• Rutile, low hydrogen and basic

Never drape a welding cable over any type of gas cylinder, and NEVER strike an arc on a gas cylinder.

• True
• False

Haw can you tell the diffrence between an EN/ISO weld symbol and a BS weld symbol?

• The EN/ISO weld symbol will always have the arrow side weld at the top of the reference line
• The EN/ISO weld symbol has the welds elementary symbol placed on a dashed line lying above or below the solid reference line to indicate a weld on the other side
• The EN/ISO weld symbol has a fillet weld leg length identified by the letter "a"
• The EN/ISO weld symbol has a fillet weld throat thickness identified by the letter "z"
• Both b and d

What is the indication at position 9 and would you accept or reject the indication to the given acceptance levels?

Nick break and fillet fracture tests are used for assessing:

• Weld quality
• Weld metal ductility
• Weld metal toughness
• Resistance to fracture

For a welding job that poses the danger that flying sparks and metal splattermight strike a welder in the chest or arms, what could make the situation safer?

• Wear welding gloves.
• Wear a loose fitting polyester shirt with a collar
• Wear heavy leather gloves with gauntlets, and a long sleeved shirt with pocket flaps.

Exposure to zinc fumes may cause metal fume fever.

• True
• False

Propane and MPS cylinders should be stored in clean, dry, well ventilated locations free from other combustables.

• True
• False

What shade lens should be worn or what shade should you set your auto darkening helmet to when welding:

• Shade 3
• Shade 8
• Shade 5
• Shade 10

The main usage of the arc air process is:

• The cutting of a weld preparation
• The removal of defective weld
• For the cutting of non-ferrous materials only
• For the cutting of ferrous materials only

what is the arc energy for the following welding process parameters?

• 0.7 KJ/mm
• 0.6KJ/mm
• 0.01KJ/mm
• 0.7KJ/mm

What is the indication at position 1 and would you accept or reject the indication to the given acceptance levels?

While cutting withacetylene, the oxygen working pressure is

• Greater than the acetylene working pressure
• Equal to the acetylene working pressure
• Less that the acetylene working pressure
• A constant 20 pounds per square inch

4. Use safety goggles and a hand shield or helmet equipped with a suitable ________ glass to protect against the intense ultraviolet and infrared rays.

• Filter
• Nice
• Cool
• Stylish

A qualified Welding Procedure Specification is used to:

• Give instruction to the welder
• Give information to the welder
• Give confidence that welds will have the specified properties.
• All of the above

What type of thread and color are fuel gas fittings?

• Right hand - red
• Left hand - red
• Right hand - green
• Left hand - green

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

Use only solvents and rags to clean cables and hoses.

• True
• False

What is the indication at position 9 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 10 and would you accept or reject the indication to the given acceptance levels?

Which of the following statments is true if applicable to a charpy vee notch impact test?

• It's destructive test used to assess material ductility in the weld zone
• It's a mechanical test used to determine a welds resistance to creep
• It's destructive test, which is used to give a measure of notch toughness
• It's a static test used to determine material toughness in the notch region
• Both a and c

What is the indication at position 8 and would you accept or reject the indication to the given acceptance levels?

You notice TIG welding being carried out using MMA electrode striped of flux being used as filler wires .you would certainly report this issue and file a non-conformance report .what would the main reason why?

• Because of the additional cost incurred
• The wire would have been too thick
• Weld metals composition would be incorrect
• The welder would not be qualified

Tungsten is used forGTAW electrodes because it has which of the following properties?

• High melting point
• Low electrical resistance
• Good heat conductivity
• High electron emission
• All of the above

Backflow prevention should be provided for oxygen cylinders

• True
• False

Oxyacetylene torches can cut?

• Stainless steel
• Aluminum
• Copper-nickell alloys
• Carbon steels

Never drag cables or hoses through dirt or oil, and never pull on a cable to force it over an obstruction.

• True
• False

What treatment is recommended after welding stainless steel?

• No treatment is required for stainless.
• Quench in water to remove oxides.
• Apply the pickling paste.
• Oil to stop rust

The maaximum safe working pressure for acetylene is?

• 5 psi
• 10 psi
• 15 psi
• 20 psi

A fully charged oxygen cylinder contains approximately 225 psi at 70 degrees F.

• True
• False

9. The work clamp must be securely attached to the _____________before the start of the welding operation.

• Tools
• Work
• Machine
• Lathe or mill

Stick (Arc) Welding uses a coated electrode; what is the purpose of this coating?

• The coating insulates the welder from electric shocks.
• The coating helps clean the weld zone from contaminants such as rust or paint.
• The coating prevents water from damaging the electrode.
• The coating produces a protective gas to prevent porosity.

Deflection of the arc by magnetic forces that can make welding difficult to control is commonly known as:

• Arc initiation
• Arc misalignment
• Arc blow
• Arc constriction

Never use _____ on gas cylinders, regulators, connections, or hoses

• Leak detector
• Oil
• Neither 1 nor 2

Which type of power source characteristic is normally used for manual welding?

• Constant Voltage
• Flat Characteristic
• Constant Current
• A Motor Generator

What should one never use on gas cylinders, regulators, connections and hoses?

• Wrenches
• Teflon tapes
• Leak detectors
• Oil

What are the initials of the federal organization created to ensure safe and sanitary working conditions for employees?

• FAA
• IRS
• FDA
• OSHA

Which fuel gas can be used to cut low-carbon steel?

• MAPP
• Propane
• Acetylene
• All the above

Toremove the oxide layer from aluminum prior to welding you should

• Brush the weld joint with a steel brush
• Brush the weld joint with a stainless steel brush
• Wipe the weld joint with a dry, clean rag
• Aluminum oxides normally do not require removal

What should one never use on gas cylinders, regulators, connections and hoses?

• Wrenches
• Teflon tape
• Leak detectors
• Oil

For a welding job where there would be a danger that flying sparks might strike a welder around the head and ear area, what could make the situation safer?

• Moving the job to a safer area.
• Make sure the welder wears the proper protective equipment to protect their head and neck area.
• Take a different welding position.
• None of the above

What is the indication at position 2 and would you accept or reject the indication to the given acceptance levels?

Oneshould never cut or weld directly against

• Cast iron
• Concrete
• A workbench
• A non-flammable surface

Never permit _____ to come in contact with a welding machine or gas cylinder.

• Electrode holder
• Bare hands
• Rod
• None of the above

Which of the following units is used to express heat input?

• Joules
• N/mm2
• J/mm2
• KJ/mm

When using GTAW toweld Aluminum with Alternating Current (AC), the tip of the tungsten electrode should be

• Tapered
• Tapered with the end slightly blunted
• Rounded at the tip
• Ground at right angles to the grain of the electrode

Silicon is added to steel and the covering of MMA electrodes in order to:

• Provide deoxidation
• Improve strength
• Improve toughness
• Provide more resistance to hydrogen cracking.

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

Avoid skin exposure to _____ because both gases are cold enough to cause frostbite.

• Carbon dioxide and helium
• Carbon dioxide and nitrogen

Which of the following current types would you expect to be used for the welding of aluminium with the TIG welding process?

• DC-ve
• DC+ve
• AC
• All of the above

GMAW is theabbreviation for?

• Gas Machine Arc Welding
• Gas Method Arc Welding
• Gas Material Arc Welding
• Gas Metal Arc Welding

In MMA, welding penetration is principally controlled by:

• Arc voltage
• Welding speed
• Ferro-silicon in the electrode coating
• Current

A welder is welding and wearing a welding helmet, the right lens shade, and safety glasses, but the welder is in a short sleeved shirt.

• The welder is safe so long as the welding is done in a hurry.
• The welder needs to have hands, arms, legs, and torso covered with durable flame-resistant clothing.
• The welder needs gloves with extremely long gauntlets.
• All of the above

A # 4 and # 6 shade welding lens used together will have the same protestion as a # 10 shade lens.

• True
• False

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

Compressed gas cylinders shall be secured in an _____ position at all times

• upright

The term low hydrogen electrode is often used for certain electrodes. What type of covering will they have?

• Cellulosic
• Rutile
• Acid
• Basic

Excessiveamounts of weld spatter in the nozzle may cause

• Lack of fusion
• Undercutting
• Poor shielding
• Longitudinal cracks

2. Remove all _____________ material such as cotton, oil, gasoline, etc., from the vicinity of welding.

• Expensive
• Flammable
• Old materials
• Notes on

How would you prepare a 25mm low carbon steel flat bar for a butt weld?

• Give it a quick grind to make sure the metal is clean.
• Grind a single bevel preparation.
• Nothing
• Grind a double V preparation

Inside of buildings, cylinders shall be stored in a well-protected, well-ventilated, dry location at least _____ feet from highly combustable materials.

Duplex stainless steel can be somtimes referred to as:

• Martensitic stainless steel
• Ferritic/austenitic stainless steel
• 316L stainless steel
• All of the above

A burn that causesthe skin to blister is referred to as a

• First degree burn
• Second degree burn
• Third degree burn
• Fourth degree burn

What is the indication at position 2 and would you accept or reject the indication to the given acceptance levels?

Gas metal arc welding is also known as ___________________________ welding.

• Arc
• Blow torch
• Quick
• Rod
• MIG

Disconnect and remove electrode holders and cables used for SMAW.

• True
• False

During the visual inspection of a fillet weld with even lengths of 15mm.the throat thickness is measured at 8.5mm, what is the fillet welds profile?

• Convex
• Mitre
• Concave
• Both a and b

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

If you found a tool to be faulty or dangerous, what should you do?

• Put it back in the store.
• Only use it one more time, then get it fixed.
• Take it out of service, report it, and if required, tag it.
• Do nothing

Keep cables off metal tables or any grounding surfaces.

• True
• False

Eye protection must be used to:

• Improve your vision
• Prevent eyestrain
• Prevent flying particles, foreign objects or corrosive agents from entering your eye
• Magnify small objects

The maximum safeworking pressure for Acetylene is

• 10 psi.
• 15 psi.
• 20 psi.
• 32 psi.

Burns are some of the most common and painful injuries in a welding shop.

• True
• False

Whichof the following is considered an advantage of the GMAW process?

• Higher deposition rates than manual processes
• Easy to use compared to manual processes
• Less electrode waste than with SMAW
• All of the above

Always keep welding equipment in _____.

• Good condition
• Out of the way
• Dirty
• As they are

Skin contact with liquid oxygen can cause frostbite.

• True
• False

Which of the following would be considered a typical heat input reading with the MIG/MAG welding process?

• 1.2KJ/mm
• 12KJ/mm
• 1.2 Joules /mm
• 6.5 KJ/mm

What is the indication at position 9 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Oxygen cylinders should never be stored with flammable gases such as acetylene cylinders.

• True
• False

When not in use, an electrode holder GTAW torch or MIG gun should not be placed in contact with a grounded metal surface.

• True
• False

Long hair, loose fitting clothes, and ties are personal safety hazards around rotating equipment.

• True
• False

Acetylene cylinders should be stored in clean, dry, well ventilated locations free from other combustables.

• True
• False

Image: https://www.proprofs.com/quiz-school/upload/yuiupload/466428505.jpg

• Fixed shade lens welding helmet
• Flip-front welding helmet
• Auto darkening helmet
• None of the above

What two items on a MIG welder would need to be changed when changing from a 0.9mm mild steel wire electrode to a 1.2mm mild steel wire electrode?

• Contact tip and shroud.
• Contact tip and drive rollers.
• Gas diffuser and drive rollers.
• Gas bottle and earth clamp.

An undesirable property of aluminium oxide residue ,when welding is that it:

• Decreases weld pool fluidity
• Requires more heat to melt it when compared to aluminium
• Causes the welder to travel to quickly
• The presence of the oxide makes aluminium impossible to weld

What is the possible effect of having heat input too low during welding?

• Low toughness,entrapped hydrogen and low hardness
• High hardness,lack of fusion and entrapped hydrogen
• Entrapped hydrogen ,low toughness and high ductility
• Lack of fusion ,low toughness and reduction in ductility

The area identified at position 10 is the?

• Fusion zone
• Fusion boundary
• Toe of the weld
• Heat affected zone

5.Welders must wear safety glasses. When using chippers and grinders, use face shields in _________ to safety glasses.

• Instead
• Addition
• Replacement
• Side

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

Which of the following is an advantage of MIG welding?

• It works well in the wind.
• You can safely weld in wet conditions with it.
• It takes less operator skill than other weld types.
• It is slow and accurate, which is good for very thin metal.

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

Which type of electrode is used for stovepipe welding for overland pipeline construction?

• Rutile
• Cellulosic
• High recovery rutile
• Acid-rutile

The area identified at position 9 is the?

• Fusion boundary
• Acid marks
• Polished area
• Heat affected zone

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

What are theinitials of the federal organization created to insure safe and sanitary working conditions foremployees?

• FAA
• IRS
• FDA
• OSHA

In an all weld metal tensile test, the original test specimens gauge length of 50mm after testing the gauge increased to 72mm, what is the elongation percentage?

• 44%
• 144%
• 69.4%
• 2.27%
• The elongation is not normally tested in this test

Oxygen cylinders should never be stored with flammable gases such as acetylene cylinders.

• True
• False

Whenusing a fire extinguisher to extinguish a fire, it should be

• Pointed at the base of the fire
• Moved up and down to cool the flames
• Pointed at the top of the fire
• Held within six (6) inches of the flames

What is the term forthe width of the cut produced by any cutting process?

• Drag line
• Kerf
• Wraparound
• Slag

Never use acetylene from a cylinder lying on its side because acetone withdrawn with the acetylene could explode.

• True
• False

You should not use oxygen as a substitute for air.

• True
• False

Gas cylinder must be chained or secured at all times.

• True
• False

While cutting with acetylene, the oxygen working pressure is?

• Greater than the acetylene working pressure
• Equal to the acetylene working pressure
• Less than the acetylene working pressure
• A constant 20 psi

While stored, valve protection caps shall be in place and _____.

Which term best describes this weld joint?

• Square edge butt joint
• Double V butt joint
• Single V butt joint
• T butt fillet weld

Skin contact with liquid oxygen can causefrostbite.

• True
• False

What is the indication at position 8 and would you accept or reject the indication to the given acceptance levels?

Which weld procedure is safe to perform in wet conditions?

• Oxy Welding
• Arc Welding
• MIG Welding
• TIG Welding

Which of the following elements is added to steel to give resistance to creep at elevated service temperatures?

• Nickel
• Manganese
• Molybdenum
• Aluminum

Which of the following fillet welded tee joints would have the highest resistance to fatigue fractures, assuming material, welding process, filler material to be the same?

• A convex fillet weld throat thickness 8mm
• A mitre fillet weld throat thickness 8mm
• A concave fillet weld throat thickness 6mm
• Both a and b (throat thicknesses dimension the same)

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Floors, aisles, and passageways must be kept clear of metal, wood, tools, material, oil and grease spots, and other objects:

• Unless the bell rings and you are in a hurry
• Because they may cause someone to slip or trip and cause injury
• Because they are unsightly and make the shop look bad
• Because they cause more work for the next class or custodians

When not in use, keep cables and hosescoiled free of kinks and properly stored.

• True
• False

A Fusible insert for TIG welding helps:

• Reduce porosity
• Give controlled root penetration
• Avoid the need for a back purge
• By acting as a backing for the root run

InGMAW, insufficient gas flow can cause?

• Undercut
• Overlap
• Porosity
• Hydrogen cracking

The maximum safe working pressure for Acetylene is

• 10 psi
• 15 psi
• 20 psi
• 32 psi

Eye protection can be worn over prescription glasses.

• True
• False

Never withdraw acetylene from a cylinder at pressure above 10 psi.

• True
• False

7. Welding may produce fumes and gases _________ to health. Avoid breathing these fumes and gases. Use adequate ventilation.

• Good
• Hazardous
• Beneficial
• Nice

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

Federalregulation requires that hazardous information about a product be providedto all users of thatproduct. The form used to provide this information is called a(n)

• Information Form (IF)
• Hazardous Information Sheet (HIS)
• Occupational Safety and Hazard Form (OSHF)
• Material Safety Data Sheet (MSDS)

Never interchange gas and water hoses without purging them first.

• True
• False

What is the indication at position 10 and would you accept or reject the indication to the given acceptance levels?

8.Do not operate the _________switch while the machine is operating under welding current load. Consequent arcing at the switch will damage the contact surfaces and the flash may burn the person operating the switch.

• Tv
• Radio
• Polarity
• Light

Whether used from a cylinder or from a piped-in supply, natural gas should be used just like any other fuel gas.

• True
• False

Always _____ fellow students and co-workers.

• Trust
• Look out for
• Mind the gap with
• None of the above

What type of clothing should always be worn when using an OFC torch?

• Leather
• 100% cotton
• Wool
• Rayon

When calibrating a mechanized MAG welding plant, which of the following applies(WFS=wire feed speed)?

• Check- WFS,current ,volts and wire diameter
• Check- WFS,joint set-up ,gas flow rate and WFS
• Check- gas flow rate,stick out length,WFS and current
• All of the above

The number 135 is placed at the end of the reference line on a weld symbol according to ISO 2553 what does the number indicate?

• The welding process is stated as MMA
• The welding process is stated as TIG
• The welding process is stated as SAW
• NDT is to e carried out after welding
• None of the above

What is the indication at position 1 and would you accept or reject the indication to the given acceptance levels?

Shielding is a process used to protect the eyes from welding fume.

• True
• False

The area identified at position 8 is the?

• Fusion boundary
• Acid marks
• Polished area
• Heat affected zone

Image: https://www.proprofs.com/quiz-school/upload/yuiupload/1219564688.jpg

• Fixed shade lens welding helmet
• Flip-front welding helmet
• Auto darkening welding helmet
• None of the above

Never cut into barrels, drums, or any container that has not been _____, or filled with water.

• Purged
• Opened

The oxyfuel cutting process uses oxygen and what other types of gases?

• Inert gases
• Reactive gases
• Mixed gases
• Flammable gases

A Hot Work Permit

• Authorizes the performance of work potentially posing a fire hazard
• Promotes the development of of standard fire safety guidelines
• Records unsafe conditions at the job site
• Helps the manager keep records of hazardous spaces

In an MMA welding process, which of the following statements is false?

• An arc gap, which remains almost constant even if as usual the welder varies the position of the electrode
• A voltage, which remains almost constant even if as usual the welder, varies the arc gap
• A current, which remains almost constant even if as usual the welder, varies the arc gap
• A and b
• All of the above

What is the purpose of the rectifier in welding sets electrical circuit?

• To keep the arc stable when using low current settings
• To convert AC current to DC current
• To convert DC current to AC current
• To initiate arc at start up

Areas that have less than ____ cubic feet per welder, or that have ceilings less than 16 feet high, require forced ventilation.

• 8,000
• 4,000
• 10,000
• 12,000

Never engage in _____.

• Horseplay of any kind
• Unsupervised welding
• Both 1 and 2
• Neither 1 nor 2

Three physical welding hazards are _______________________________radiation, infrared radiation, and intense visible light.

• Ultra violet
• Nuclear
• Purple
• Gamma
• Beta

While welding, ventilation should be placed as close to the fume source as practical.

• True
• False

Whichof the following is an incorrect statement about an E7018electrode?

• Once opened, it should be kept in an electrode oven.
• The weld deposit has a minimum tensile strength of 70,000 psi.
• It is suitable for use in the flat and horizontal fillet positions only.
• It is suitable for use in all positions.
• It is a low hydrogen electrode.

Burnsare some of the most common and painful injuries in a welding shop.

• True
• False

What type of threadand color are fuel gases fittings?

• Right hand - Red
• Left hand-Red
• Right hand - Green
• Left hand - Green

When work is finished, when cylinders are moved at any time, or when cylinders are _____, cylinder valves shall be closed

• Empty
• Full

Which of the following under typical conditions using the MMA welding process would give the deepest penetration?

• DC-ve
• DC+ve
• AC
• Both a and b

Because of the low amount of ultraviolet light present, it is not necessary to use shaded lenses when oxy-fuel cutting.

• True
• False

What is the indication at position 2 and would you accept or reject the indication to the given acceptance levels?

Weld spatter during MMA welding is most likely to be caused by:

• Excessive current
• Incorrect baking and storage of electrodes
• Bad batch of electrodes
• Too low an OCV

Never _____ electrical equipment to a building member or a piece of equipment attached to or part of a building.

• Hang
• Ground
• None of the above

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Which oxyacetylene flame has an excess of fuel?

• Oxidizing
• Neutral
• Carborizing
• None of the above

Fuelgas hoses are usually colored

• Green
• Red
• Blue
• Yellow

The area identified at position 8 is the?

• Heat affected zone
• Fusion boundary
• Fusion zone
• Polished area

One should never enter a welding shop without wearing

• Gloves
• Safety glasses
• A welding helmet
• Welding leathers

Pre heat prior to the welding of a carbon steel but weld:

• Must always be carried out
• Is always carried out using a gas flame
• Need not be carried out if post weld heat treatment is to follow
• None of the above

Whichshielding gas or gas mixture is most often used for welding carbon steelwith the short-circuiting transfer mode?

• 100% Argon
• 10% Carbon dioxide, 90% Helium
• 98% Argon, 2% Oxygen
• 75% Argon, 25% Carbon Dioxide

Potentialhazards relating to arc welding are

• Radiation
• Fumes
• Toxic gases
• All of the above

The area identified at position 9 is the?

• Heat affected zone
• Fusion boundary
• Fusion zone
• Polished area

Because acetylene burns readily, actetylene cylinders should be kept safely away from open flames.

• True
• False

The device used to control the pressure on an oxyfuel cutting torch set is called?

• Valves
• Handles
• Wing-pressure adjusting screws
• Regulators

Weld centerline longitudinal cracks in welded butt joints may have resulted from which of the following?

• Solidification problems
• Hydrogen entrapment
• Poor welder skill
• Both a and b

6. Flameproof aprons or jackets made of leather, fire resistant material, or other suitable material should be worn for ____________ against spatter of molten metal, radiated heat, and sparks.

• Protection
• Rejection
• Evacuation
• Mobilization

When performing a fillet weld between two pieces of 5mm thick mild steel, what is the recommended size (leg length) of the weld? (when not given a size)

• 5mm
• 10mm
• 7.5mm
• 3mm

What is the indication at position 2 and would you accept or reject the indication to the given acceptance levels?

Loose clothing, jewelry, and long hair must be securely fastened or removed:

• Before operating any machines
• Before the end of class
• Only when the instructor is watching
• Only when it will not affect your image

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

One should never cut or weld directly against

• Cast iron
• Concrete
• A workbench
• A non-flammable surface

The area identified at position 9 is the?

• Heat affected zone
• Fusion boundary
• Fusion zone
• Polished area

Acetylene cylinders should never be operated while lying on their side because acetone could be drawn into the valve, regulator and hoses.

• True
• False

Which one of the following electrodes is not suitable for use in all positions?

• E6010
• E6011
• E7018
• E7024

The oxyfuel processuses oxygen and what other types of gases?

• Inert Gases
• Reactive Gases
• Mixed gases
• Flammable gases

What is the indication at position 4 and would you accept or reject the indication to the given acceptance levels?

A butane or propane cigarette lighter is safe around welding equipment as long as it is kept in one's pocket.

• True
• False

One should never touch an electrode to a metal surface other than the workpiece because those surfaces may become electrically live.

• True
• False

The area identified at position 9 is the?

• Heat affected zone
• Fusion boundary
• Fusion zone
• Polished area

Whichof the following is not an advantage of the GMAW process?

• Higher deposition rates
• Relatively easy process for a beginner to learn
• Can be used to weld ferrous and nonferrous metals
• Good for use in windy areas

Fuel gas hoses are usually colored

• Green
• Red
• Blue
• Yellow

What does the number 141 refer to when it is written next to the tail when using symbols?

• WPS number
• Welding process
• Filler material
• Acceptance Standard

One should never operatearc welding equipment while

• Standing on wet or damp floors
• In poorly lighted area
• Someone is standing nearby
• In a confined area with proper ventilation

Vaporizedmetals, such as zinc, cadmium, lead, chromium and beryllium

• Are hazardous
• Can be ignored
• Are highly flammable
• May cause slag inclusions

For a welding job that will require a welder to be welding out of position in a confined area, what could make the situation safer?

• Have the welder move to another position.
• Have the welder wear a welding jacket and welder's cap.
• Have the welder wear a hard hat.
• All of the above

Potential hazards related to arc welding are

• Radiation
• Fumes
• Toxic gases
• All of the above

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

In steel the element with the greatest effect on hardness is:

• Chromium
• Manganese
• Carbon
• Nickel

which of the following welding parameters are the most difficult to control during the welding operation using a manual arc welding process?

• Travel speed
• Voltage
• Current
• Arc length

What is the indication at position 5 and would you accept or reject the indication to the given acceptance levels?

How would you prepare heavily rusted mild steel for welding?

• Wash with soap and water.
• Grind back to bare metal.
• Nothing, I would weld over it.
• Give it light sand with 240 grit sandpaper.

3. Mark all hot metal after welding operations are completed. _____________is commonly used for this purpose.

• Pen
• Pencil
• Permanent marker
• Soapstone or chalk

It is not necessary to wear shaded lenses when oxyfuel cutting, because it uses a flame instead of an electric arc.

• True
• False

Whattype of fire extinguisher should be used on electrical fires?

• Type A
• Type B
• TypeC
• Type D

A WPS may specify a maximum width for individual weld beads (the weave width) when welding C-Mn steels. if the width is exceeded it may cause:

• Lack of inter-run fusion
• A reduction in HAZ toughness
• Lack of sidewall fusion
• Too low a deposition rate

What is the indication at position 10 and would you accept or reject the indication to the given acceptance levels?

What is the minimum recommended filter shade on a welding helmet to protect your eyes?

• Shade 10
• Shade 13
• Shade 5
• Clear lens

The area identified at position 1 is the?

• Square edge butt
• Double V butt joint
• Single V butt joint
• T butt fillet weld

The main reason for grinding the capping passes flush is:

• To increase fatigue life
• To increase the chances of fatigue cracking
• To improve visual appearance
• To reduce the components weight

Which of the following is the only acceptable method for lighting oxyfuel torches?

• Matches
• Cigarette lighter
• Welding arc
• Striker

Whilewelding, ventilation should be placed as close to the fume source as practical.

• True
• False

What is the indication at position 7 and would you accept or reject the indication to the given acceptance levels?

Which of thefollowing electrodes would you select to produce a weld with shallow penetration?

• E6010
• E6011
• E6013
• E7018

A typical temperature range for baking basic coated electrodes is:

• 150-200ºC
• 200-250ºC
• 300-350ºC
• 400-450ºC

You are the only welding inspection on a cross country gas supply pipeline project .which of the following welding /fabrication stages would you consider the most important stage for your closest scrutiny?

• Fit-up and root pass welding
• Post weld cleaning
• Fillers and capping pass welding
• Radiography

Fuel cylinders must be stored at least ____ feet from combustibles.

• 10
• 5
• 0
• 20
• 1

Since oxygen _____ may react violently in the presence of oil or grease, all oxygen fittings and equipment should be kept free of oil and grease.

• In storage
• Under pressure

Always check welding areas to make sure they're _____.

• Safe to work in
• Well lit
• They have food stalls
• They have TV for entertainment

What is the indication at position 6 and would you accept or reject the indication to the given acceptance levels?

The shielding gasmost commonly used for welding low carbon steel with GTAW is

• Carbon Dioxide
• Argon
• Helium
• A mix of Argon and Helium

ANSI Z49.1 allows oxygen to be used as a substitute for compressed air when necessary.

• True
• False

What is the indication at position 3 and would you accept or reject the indication to the given acceptance levels?

Oxygen cylinders should never be stored near _____ such as acetylene cylinders.

• Highly combustible materials
• Any other fuels