Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • shall use pressure relief devices

2: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?

  • 12,000 BTU
  • 24,000 BTU
  • 970 BTU
  • 144 BTU

3: How many different groups of refrigerants are there?

  • 7
  • 11
  • 15
  • 3

4: Booster compressors connect to the ____ side of the compressor

  • oil side
  • liquid
  • vapor
  • low side

5: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

6: How many square inches per square foot?

  • 64
  • 24
  • 144
  • 98

7: A micron is

  • a larger unit of measurement than Hg
  • one millonths of a micrometer
  • one millonths of a centimeter
  • one thousandths of a millimeter

8: Class T machine room

  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor

9: What is the typical air conditioning operating pressures for R-22?

  • 60 psi suction 210 psi discharge
  • 25 psi suction 125 psi discharge
  • 105 psi suction 340 psi discharge
  • None of the above

10: What refrigerant doesn't have to be classified?

  • R-717
  • R-134A
  • R-718
  • R-422A

11: A single pole-double throw switch used how many wires excluding the ground wire?

  • four
  • three
  • two
  • five

12: Pairs of mating stop valves that allow sections of a system to be joined before opening these valves or separated after closing them are

  • ball valves
  • gate or globe valves
  • king valves
  • companion or block valves

13: An air conditioning system rated for 36,000 BTU's is equivalent to

  • two tons of cooling
  • one ton of cooling
  • 12,000 tons of cooling
  • three tons of cooling

14: Pi equals approximately

  • 3.14
  • 3.41
  • 746
  • 12,000

15: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

16: A run capacitor is wired in series with the _____ windings.

  • start
  • run
  • start capacitor
  • common

17: When should a relief valve start to function?

  • 10 psi before it's set pressure
  • At it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges

18: one BTU equals

  • 3.41 hp
  • Pi
  • 12,000 hp
  • 31.4 hp

19: What would be the classification of a prison?

  • Institutional
  • Large mercantile
  • Place of assembly
  • Industrial

20: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-12
  • R-113
  • R-11

21: Three-phase motors have what type of windings?

  • one start winding and one run winding.
  • three start windings
  • three run windings
  • three run windings and 3 start windings

22: If the power element of an expansion valve should lose its charge the valve would

  • go open
  • go closed
  • underfeed the evaporator
  • overfeed the evaporator

23: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

24: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

25: Pressure is the equivalent of

  • force
  • area times force
  • force per unit area
  • force times area