Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: How many refrigerant classifications are there for toxicity?

  • 5
  • 2
  • 1
  • 3

2: If two 500 ohm resistors are connected in series, the resistance will be

  • 1000 ohms
  • 500 ohms
  • 20 ohms
  • 200 ohms

3: A normal operating evaporator temperature of R-22 for air conditioning is typically

  • 45F
  • 55F
  • 58F
  • 32F

4: It is permissible to use a single-pole switch on a 2 HP motor running at 240 volts as long as the switch is rated for at least 2x FLA.

  • True
  • False

5: The outer portion of shell of the compressor used on low-pressure chillers is called the

  • suction
  • baffle
  • nozzle
  • volute

6: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • PSIA
  • Pounds of air per minute.
  • PSIG

7: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

8: A hotel is considered a _______ occupancy.

  • institutional
  • mercantile
  • residential
  • commercial

9: 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

10: The instrument used to measure the specific gravity of absorption chiller solutions is the

  • Psychrometer
  • hydrometer
  • refractometer
  • anemometer

11: R-22 falls under which safety classification?

  • B-1
  • A-2
  • A-1
  • B-2

12: A 24 volt transformer with a 240 volt primary can handle how many amps?

  • There isn't enough information to answer.
  • 20 amps
  • 10 amps
  • 24 amps

13: Pressure is the equivalent of

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

14: Refrigerant restricted in 2004 but used for transition for decades:

  • R-123
  • R-22
  • R-11
  • R-134A

15: The freezing point of water at sea level is?

  • 32F
  • 32C
  • -10C
  • 0F

16: Ammonia belongs to Group

  • B-2
  • A-1
  • B-1
  • A-2

17: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class T machinery room
  • Class B machinery room
  • Class A machinery room
  • Class M machinery room

18: In a system designed for sub-zero ambient temperatures, what must be added?

  • Low-ambient kit
  • Infrared dye for leak identification
  • Nitrogen
  • Booster compressor

19: The level of voltage caused by back electromagnetic force that opens the contacts of a potential relay in order to take the start capacitor out of the circuit is

  • pick up voltage
  • lift voltage
  • boost voltage
  • run voltage

20: Who is permitted to access a refrigeration machine room?

  • Any employee
  • Anyone, it's a completely safe area
  • Authorized persons only
  • Contractors only

21: Megaohm meter's main function is

  • to detect weak motor winding insulation of a refrigeration or air conditioning compressor by creating high DC voltages to the compressor
  • to detect very high resistances to ground of refrigeration or air conditioning compressors
  • to test very high value capacitors for large 3-phase refrigeration compressors and blower motors.
  • Both a and b are correct

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

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

23: What would be the classification of a church?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Institutional

24: What is Trichlorotrifluoromethane?

  • R-13
  • R-113
  • R-11
  • R-12

25: How many flammability classifications are refrigerants in?

  • 5
  • 2
  • 7
  • 3