Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The amount of heat required to raise the temperature of 1 lb of water 1F is?

  • 1 Therm
  • The rate of conduction
  • 1 Kelvin
  • 1 BTU

2: What is Trichlorotrifluoromethane?

  • R-113
  • R-13
  • R-11
  • R-12

3: A rule of thumb in air conditioning is ____ CFM per ton?

  • 100
  • 600
  • 400
  • 500

4: The low pressure oil safety switch

  • resets itself after the time delay has terminated
  • must be reset manually
  • never trips
  • resets itself automatically

5: Start to Run windings will have what resistance?

  • All will be at equal values
  • Somewhere between the actual start winding and run winding resistance value
  • The most resistance value
  • The least resistance value

6: "E" references ____ in the Ohm's law formula

  • amperage
  • capacitance
  • voltage
  • resistance

7: A Lithium-bromide system is an absorption system that

  • uses salts as an absorbent and lithium bromide as a refrigerant
  • uses water as a refrigerant and lithium bromide as an absorbent
  • uses ammonia as a refrigerant and lithium bromide as an absorbent
  • uses water as a absorbent and lithium bromide as a refrigerant

8: In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is

  • Specific heat
  • Enthalpy
  • Sensible heat
  • Latent heat

9: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • the same
  • lower
  • there is no Group B1 refrigerants
  • higher

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

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

11: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 1000F
  • 600F
  • 800F

12: The evaporator is a device to

  • Keep the compressor busy
  • absorb heat into the refrigeration system
  • remove heat from the refrigeration system
  • store liquid refrigerant

13: All low-pressure chillers use which type of compressor?

  • Reciprocating
  • Rotary
  • Centrifugal
  • Scroll

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

  • oil side
  • vapor
  • low side
  • liquid

15: Gauge pressure is

  • what a gauge reads when checking pressures on a chilled water system.
  • force of pressure above that of atmospheric
  • atmospheric pressure
  • absolute pressure

16: R-717 is

  • ammonia
  • trichloromethane
  • carbon dioxide
  • water

17: When should a relief valve start to function?

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

18: Capacitors are rated in

  • micro-farads
  • megaohms
  • volt - amperes
  • kelvins

19: Suction line oil traps should be installed when the condenser is

  • in the basement and the evaporator is on the third floor
  • more than 100' away from the evaporator
  • located outside the operates in temperatures below 35F
  • on the third floor roof and the evaporator is in the basement

20: The rupture disc on a low-pressure chiller typically releases pressure at

  • 5 psig
  • 0 psig
  • 10 psig
  • 15 psig

21: The reversing valve is commonly used

  • on commercial system that involve two different temperatures
  • when the code requires a check valve
  • on multiple compressor systems
  • on all heat pumps

22: At higher altitudes, boiling temperatures

  • depends on the refrigerant
  • decrease
  • are unaffected
  • increase

23: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • self-closing doors
  • automatic ventilation
  • tight fitting doors

24: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.

25: Copper and its alloys shall not be used with ammonia

  • True
  • False