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Provides comprehensive training on the installation, and repair of air conditioning and refrigeration systems, ensuring optimal performance and energy saving.
The air conditioning compressor _____________ vaporized refrigerant and allows it to flow to the condenser.
The R 134a cylinder color is ........
The state of Refrigerant at point A is ........
31. Which one of the following voltages is not standard?
What state is the refrigerant in when leaving the compressor?
34. What is the minimum load per each linear foot that must be allowed for show-window lighting?
What is the value of the optimum effective temperature in summer?
8. All 125-volt, single-phase, 15- or 20-ampere receptacle outlets installed in bathrooms of dwelling units always require:
The effective temperature increases with a decrease in relative humidity at the same DBT.
What does MAC stand for?
Where would you expect to find a highpressure liquid within an AC system?
The name of part No (4) is...........
What is the state of the refrigerant leaving the metering device in a refrigerator?
36. If four 12 kW electric ranges are used in a four-unit apartment complex, what is the total kW rating that must be used for all of these ranges in calculating the electric service?
Exclusively used for carrying materials and shall not carry any person.
11. Holes in wood studs for cables must be drilled in the center of the stud and a distance from the nearest edge of not less than:
When leaving the compressor what state is the refrigerant in?
The state of Refrigerant at point C is ........
- an A/C system component into which high-pressure liquid refrigerant flows and is temporarily stored and dehydrated, usually located between the condenser outlet and expansion valve.
Every occupant of a high-rise commercial building needs to take lifts at least _____ times a day, in the morning, during lunch and after office hours
What does COSHH stand for?
- a chemical compound used in an A/C system to remove heat from the evaporator and transfer it to the condenser.
Which engine driven device compresses refrigerant and pumps it through the air conditioning system?
26. The lighting outlets installed at or near heating, air-conditioning, and refrigeration equipment in attics or underfloor spaces be controlled by a switch. Where must the switch be located?
What type of refrigerant is R134a?
45. Receptacles and cord connectors that have equipment grounding conductor contacts must have those contacts:
49. What location requires all 15- and 20-ampere receptacles to be protected with a ground fault circuit-interrupter?
How would you know the air con gas hasbeen fully recovered from the system?
What is a heat exchanger that induces condensation on the pressurized refrigerant, so that it changes phase from a gas to a liquid?
Why must refrigerant be recovered from the A/C system before any A/C parts are replaced?
2. What is the minimum size THW copper conductor that may be used on a 30-ampere branch circuit?
30. Service conductors run above the top level of a window shall be permitted to be less than the _____ requirement.
Where would you expect to find a high pressure liquid within an AC system?
What is the temperature of the liquid line if you touch it?
When the hospital elevator can be made accessible at any other level which is accessible by means of an elevator with a minimum width of ____ mm
42. What is the minimum size conductor allowed for festoon lighting?
What does a TXV do?
Which of these is NOT a refrigerant used in automotive A/C sytems?
10. Insulated conductors of No. 6 or smaller intended for use as grounded conductors in a circuit must be either of the following colors:
In the evaporator, refrigerant is under very low pressure and is much colder than the air inside of the vehicle. Because of this, heat transfers from the ________ to the _______, causing the refrigerant to _______.
35. What percent of fixed electric space heating loads must be used in calculating the total connected load on a branch circuit or feeder?
- to remove refrigerant from an A/C system and store it temporarily.
22. A 125-volt single-phase, 15- or 20-ampere receptacle be installed for the servicing of heating, air conditioning and refrigeration equipment must be installed within what distance from the equipment?
48. When receptacles are connected to circuits having different voltages, frequencies, or types of current (ac or dc) on the same premises, what precautions must be taken?
The rated speed Of Escalators shall be not more than 0.64 m/s except that higher speeds may be permitted subject to the approval of the enforcing authority.
The elevators require regular inspection and maintenance and generally have a life of _____ years.
What is the temperature of the discharge line if you touch it.
How should R134a be stored to meet safetyrequirements?
- a heat exchanger, in which low-pressure refrigerant flows and changes state, absorbing heat from the surrounding air and cools the passenger compartment.
What is the job of the condenser?
What do you call the part of a refrigeration system in which the refrigerant absorbs heat and changes from a liquid to a gas.
elevators which are powered by a piston that travels inside a cylinder.
- any of the various designs of fittings that allow service tools such as manifold gauges to be attached to an A/C system.
Which component squeezes the gas?
If contamination within an air conditioning system is suspected and a flushing procedure is to be carried out what component should also be changed?
38. What demand factor is allowed for a commercial kitchen with one electric appliance?
a valve that controls the flow of refrigerant, changing it from a high pressure liquid to a low pressure gas
1. The cross-sectional area of three or more THW conductors ina conduit must not exceed what percent of the cross-sectional areaof the conduit?
The machine room and the escalator hoistway shall be finished with mortar or other materials so as to prevent concrete dust.
How could you confirm the type ofrefrigerant present in an air conditioning system?
Most escalator are designed with ____ mm wide steps which allow passengers to move comfortably when carrying luggage and shopping bags
Adding pressure to a liquid _______ its boiling point. Adding pressure to a vapor _______ its temperature.
17. The branch-circuit load for a single 12-kilowatt (12 kW) electric range in a dwelling is:
What is the temperature of the suction line if you touch it?
A chemical compound that is used as the heat carrier, which changes from gas to liquid and then back to gas in the refrigeration cycle
6. Branch circuits in two-family or multifamily dwellings required for the purpose of central lighting, central alarm, signal, communications, or other needs for public or commercial areas shall:
a dynamic and responsive architecture that provides every occupant with productive, cost-effective and environmentally approved conditions through a continuous interaction among its basic elements; Places, Process, People, Management, Interrelation between them.
4. What is the maximum continuous load (in amperes) that can be used on a 240-volt, 20- ampere circuit using two No. 12 AWG conductors with THW insulation?
46. The equipment grounding conductor contacts of receptacles and cord connectors must be grounded by:
40. When outside overhead wiring is used, with no messenger cable, what is the minimum size aluminum wire allowed for spans up to 50 feet?
What are the impacts on the environmentof fluorinated greenhouse gases?
What is the value of optimum effective temperature in winter?
are the moving step type lifts operating at constant speed between two levels in an inclined course for moving large number of people in a short time
Assuming normal atmospheric pressure atwhat temperature would R134a boil?
39. When outside overhead wiring is used, with no messenger cable, what is the minimum size copper wire allowed for spans up to 50 feet?.
Designed to achieve the environmental requirements of the comfort of occupants and a process.
Automatic centralized control of a building's HVAC and otherinterrelated system.
The main components of the Air conditioning system are
Which of the following would be carriedout to confirm a system contained no refrigerant?
The Simple Refrigeration cycle consists of .....
These lifts are self-contained and can be easily moved to where they are needed.
19. How many receptacles are required in a residential hallway 12 feet in length?
_________ are the devices that monitor their environment and record or send that information (data) to a computer processor.
An electric motor shall not drive more than _____ escalator.
When the heat stored in the body is ________ the human body feels comfortable.
This removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator
29. Feeders containing a common neutral are permitted to supply how many sets of 5-wire feeders
28. Feeders containing a common neutral are permitted to supply how many sets of 4-wire feeders?
What is the job of the expansion device?
If contamination within an airconditioning system is suspected and a flushing procedure is to be carried outwhat component should also be changed?
The heat production from a normal healthy man when asleep is about _________
32. Where a feeder conductor supplies continuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus what percent of the continuous load?
13. Cable tray systems must not be used:
25. How are the lighting outlets installed at or near heating, air-conditioning, and refrigeration equipment in attics or underfloor spaces be controlled?
The name of part No (3) is...........
What is the job of the evaporator?
The state of Refrigerant at point B is ........
What is the temperature of the line at the outlet of the expansion device if you touch it?
What happens in the first 1/3 of the condenser?
Where does the low pressure liquid become a gas?
24. How many lighting outlets must be installed at or near heating, air-conditioning, and refrigeration equipment in attics or underfloor spaces?
What is the state of the refrigerant entering the compressor?
9. The NEC allows wall-switch controlled receptacles in dwelling units in lieu of lighting outlets in all habitable rooms except:
The name of part No. (1) is .......
41. Where outdoor pendant-type lampholders have terminals that puncture conductor insulation to make contact with the conductor, what type of wire must the conductor be?
47. When existing nongrounding types of receptacles need replacing, what type of receptacle must be used?
The process of lowering the temperature of a substance below that of its surroundings
37. If the apartment complex is expanded to include a total of 40 units with a 12 kW range in each, what is the total kW rating for all the ranges that must be used in calculating the electric service?
5. A 30-ampere branch circuit may supply fixed lighting units in:
Escalator Inspection are required once a year.
14. EMT shall be supported at least every:
44. What is the maximum voltage allowed to supply listed electric-discharge lighting in residences, hotels, motels and similar occupancies?
In a typical system, within whichcomponent would the evaporation of refrigerant take place?
21. In what location must a 125-volt single-phase, 15- or 20-ampere receptacle be installed for the servicing of heating, air conditioning and refrigeration equipment?
3. Heavy-duty type lampholders are required on branch-circuits having a rating in excess of:
12. Direct buried conductors and cables emerging from grade shall be protected by an enclosure or raceway a distance above ground of no less than:
The state of Refrigerant at point D is ........
a compound typically found in either a fluid or gaseous state. It readily absorbs heat from the environment and can provide refrigeration or air conditioning when combined with other components such as compressors and evaporators.
27. Feeders containing a common neutral are permitted to supply how many sets of 3-wire feeders?
What is the compressor known as?
The name part (2) is ...........
Which of the following is true about the optimum effective temperature for human comfort?
15. The total equivalent bend in rigid conduit between pull points (outlet to outlet, fitting to fitting, or outlet to fitting) shall not exceed:
What is the state of the refrigerant leaving the evaporator?
a device, similar to a radiator, in which the refrigerant loses heat and changes state from a high-pressure gas to a high-pressure liquid as it dissipates heat to the surrounding air.
What does a Thermal Xpansion Valve do?
Which of the following provides the relationship between the optimum indoor effective temperature and optimum outdoor effective temperature?
7. EMT must be supported within what distance from an outlet box, junction box, device box, cabinet, conduit body or other terminations?
Most common type of elevator. Elevator cars are pulled by means of rolling steel ropes over a deeply grooved pulley also called sheave.
43. Receptacles installed on 15- and 20-ampere branch circuits must always be of what type?
23. A 125-volt single-phase, 15- or 20-ampere receptacle be installed for the servicing of heating, air conditioning and refrigeration equipment. The receptacle outlet shall not be connected to the ___ side of the equipment disconnecting means
20. How many receptacle outlets are required in a residential garage?
In what state is the refrigerant when it exits the condenser?
A speed governor shall be provided in the escalator, the operation of which will cause the interruption of power to the driving machine should the speed of the steps exceed a pre-determined value, which shall be not more than ____% above the rated speed.
18. A 20-ampere laundry circuit is always required in each:
50. Which one of the following is not allowed to supply branch circuits?
Which of the following does not mainly a factor of dependency for the degree of warmth or cold?
Which system has moving parts?
33. Where a feeder conductor supplies continuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125% percent of the continuous load except?
a type of vertical transport equipment that efficiently moves people or goods between floors (levels, decks) of a building, vessel or other structures.Powered by Electric Motors
16. When a branch circuit feeds both noncontinuous and continuous loads, the circuit must be sized to accommodate 100% of the noncontinuous load plus what percent of the continuous load?
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