Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What is Trichlorotrifluoromethane?

  • R-12
  • R-13
  • R-113
  • R-11

2: When an A/C system is excessively low on refrigerant

  • it can become contaminated with water
  • there can be nuisance trip outs
  • the suction line may be too hot to touch
  • All of the above

3: Stop valves shall not be permitted between the system and the

  • bleed valve
  • relief valve
  • condenser
  • service valve

4: What device removes the start winding from the circuit of a split-phase motor once the motor reaches 75% of its rated load amps (RLA)?

  • motor starter
  • printed circuit board (PCB)
  • centrifugal switch
  • duel-voltage switch

5: Where must a refrigeration contractor's license number be displayed?

  • Trucks, license plates, and uniforms
  • Trucks, invoices, and advertising
  • Truck, office, every job, and on all equipment
  • Uniforms, checks, and invoices.

6: What is NOT a positive displacement compressor.

  • Rotary
  • Reciprocating
  • Scroll
  • Centrifugal

7: A water regulating valve opens when

  • the head pressure rises
  • the compressor is on
  • when the power is on
  • when the power is on there is an overcharge of refrigerant

8: A 120 volt motor rated at 1,800 watts. You find the motor is drawings 25 amps. The motor is

  • drawing RLA and is running as it should
  • drawing LRA and is seized and should be replaced.
  • running hot
  • none of the above

9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there is a space 6' or more above it
  • When its white
  • When it's used as part of a supply or return air system
  • When there are sprinklers above

10: How are safety controls wired in a circuit?

  • Either series or parallel
  • Series
  • Series/parallel
  • Parallel

11: What is Absolute Zero?

  • -773F
  • -460F
  • -400F
  • -640F

12: If a liquid receiver is designed to receive the refrigerant charge during a pumpdown procedure, it shall have the capacity to

  • hold up to 110% of the pumpdown charge
  • receive the pumpdown charge
  • Pumpdown procedures are not allowed with systems containing liquid recievers
  • release the charge when the pressure exceeds 310 psig or higher

13: One atmosphere equals

  • 29.4
  • 0 psia
  • 0 psig
  • 14.7

14: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

15: Fractionation occurs when

  • the pressures decreases as the heat load decreases
  • when a fraction of refrigerant is added as the full charge
  • some of the blended refrigerant evaporates or condenses before the rest of the blend
  • the pressures increase as the heat load increases

16: How many gallons of water per pound of ammonia do you need?

  • 15
  • 20
  • 1
  • 5

17: A relief valve shall be located at least ___ above grade.

  • 15'
  • 25'
  • 36'
  • 10'

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

  • R-113
  • R-11
  • R-12
  • R-22

19: A normally operating R-410A system with a condensing temperature of 110F will have a high side pressure of around ______ psig

  • 255 psig
  • 365 psig
  • 125 psig
  • 327 psig

20: Heat transferred by conduction from one body to another is done via:

  • gas
  • liquid
  • solid
  • All of the above

21: After setting up a forward curved fan for the desired conditions, something happened to lower the total static pressure the fan had to operate against. Which would occur?

  • RPM and CFM increase
  • CFM and RPM decrease
  • CFM and HP increase
  • CFM and HP decrease

22: The equivalent length of pipe in a water piping system is

  • the total length of pipe plus equivalent-length of fittings
  • the total length of pipe as you would measure it plus 25% for fittigns
  • the total length of pipe as you would measure it
  • the total length of pipe plus equivalent of fittings multiplied by 2.31

23: What type refrigerant is NOT ozone depleting?

  • HCFC
  • HFC
  • CFC
  • Halon

24: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

25: A restaurant is classified as a

  • mixed occupancy
  • commercial occupancy
  • public assembly occupancy
  • large mercantile occupancy