Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: An example of an "Expendable Refrigerant" is

  • liquid oxygen
  • liquid nitrogen
  • lithium bromide
  • ammonia

2: Which of the following most closely represents the concentration of Li-Br in a absorption system?

  • 40% Li-Br, 60% distilled water
  • 40% Li-Br, 60% tap water
  • 60% Li-Br, 40% distilled water
  • 50% Li-Br, 50% tap water

3: What is considered a cooling agent?

  • any liquid used for the transmission of heat when vaporization occurs
  • any liquid used for the transmission of heat without condensation
  • any liquid used for the transmission of heat without vaporization
  • any liquid used for the transmission of heat when condensation occur

4: How is bring measured?

  • manometer
  • anemometer
  • hydrometer
  • hygrometer

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

  • 36'
  • 10'
  • 25'
  • 15'

6: The reversing valve is commonly used

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

7: Where is an EPR valve located on a multi-evaporator system?

  • Suction line at the compressor
  • Suction line of the coolest evaporator
  • Suction line prior to the accumulator of the lowest temperature system
  • Suction line of the warmest evaporator

8: Sensible heat is the heat added to a substance to

  • cause evaporation
  • change its state
  • raise its temperature
  • freeze it

9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 500 lbs
  • 330 lbs
  • 660 lbs
  • 55 lbs

10: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 50
  • 15
  • 75
  • 55

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

  • common
  • start capacitor
  • run
  • start

12: B3 refrigerants are considered

  • non-toxic but non-flammable
  • toxic and highly flammable
  • toxic but non-flammable
  • non-toxic but flammable

13: A EPR valve is installed on what type of evaporators?

  • shell and tube evaporators
  • low-temperature evaporators
  • high-temperature evaporators
  • plate evaporators

14: Heat cannot of itself, pass from a

  • cold to a warmer body
  • warm to a colder body
  • state of hot energy to a state of cold energy
  • None of the above

15: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

16: When air is ducted through a machine room that services occupied space, What must be done?

  • Insulated and cross broke
  • Welded and seamed.
  • Flanged and gasketed
  • Ducted and sealed

17: If the dry bulb temperature is 85F and the wet bulb temperature is 70F, the dew point temperature will be approximately (use psychometric chart)

  • 32F
  • 70F
  • 58F
  • 77F

18: Volts x amps equals

  • Impedance
  • Inductance
  • Watts
  • Ohms Law

19: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Copper
  • Magnesium alloy
  • Aluminum

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

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

21: "E" represents _____ in the Watt's law formula.

  • voltage
  • reactance
  • watts
  • amperage

22: What is R-22?

  • HFC
  • Chlorofluoromethane
  • Chlorodifluoromethane
  • CCFCM

23: 1 HP = ____ Watts?

  • 3.1416
  • 3,412
  • 11,239
  • 746

24: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

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

  • relief valve
  • bleed valve
  • service valve
  • condenser