Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Where a refrigeration or air conditioning system is installed,

  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • it shall not be operated below prescribed pressuers
  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety

2: A hotel is considered a _______ occupancy.

  • commercial
  • mercantile
  • institutional
  • residential

3: Name a reason that does not cause reduced condenser air quantity

  • Dirty Coil
  • Dirty fan blades
  • High ambient temperature
  • Prevailing winds

4: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • load-side of the contactor in
  • breaker panel in

5: What is potential measured in?

  • Henrys
  • Volts
  • Ohms
  • Amps

6: A halide torch is most useful with a freon compression system

  • to sweat flanges on the refrigeration piping
  • to release a sticking valve
  • to detect refrigeration leaks in piping joints
  • to remove from from TXV's and evaporator coils

7: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • public assembly occupancy.
  • business occupancy
  • commercial occupancy
  • mercantile occupancy

8: What is the purpose of suction/discharge traps?

  • to ensure proper oil return to the compressor
  • to keep oil inside the evaporator for proper oil return to the compressor
  • to keep oil inside of the accumulator for proper return to the compressor
  • all of the above

9: How are refrigerant blends classified?

  • Based on the oil used
  • Based on worst case fractionation
  • Blends don't have to be classified
  • Based on best case Fractionation

10: What must be done to refrigerant pipes before being buried?

  • Encased
  • Coated
  • Leaked checked
  • Certified

11: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?

  • Solenoid valve
  • EPR valve
  • CPR valve
  • EEV

12: A chilled water pump suction gauge reads 10 psig. Discharge gauge reads 48 psig. The head in feet of the pump is working against

  • 88
  • 38
  • 108
  • 116

13: The two float-type metering devices are the

  • liquid float and the low-side float
  • liquid float and the vapor float
  • high-side float and the low-side float
  • vapor float and the low-side float.

14: On cooling towers, what causes the condenser water to drop

  • sensible heat
  • tower fans
  • evaporation of the water droplets
  • ambient temperatures

15: At higher altitudes, boiling temperatures

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

16: 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

17: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

18: High side floats are used on centrifugal chiller systems are are considered critically charged systems.

  • are obsolete.
  • True
  • depends on the type of refrigerant being used
  • False

19: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

20: Low pressure chiller systems use what type of compressor?

  • Reciprocating
  • Centrifugal
  • Scroll
  • Screw

21: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?

  • it would have no effect on the condenser
  • it would cause the condenser to sweat
  • it would make the condenser less efficient
  • it would make the condenser more efficient

22: An azeotropic refrigerant is

  • a mixture of two or more refrigerants that boil at about the same temperature minimizing temperature glide.
  • a mixture of two or more refrigerants that boil at much different temperatures causing temperature glide
  • a mixture of two or more refrigerants that boil at much different temperatures minimizing temperature glide
  • none of the above

23: A chilled water pump's suction gauge reads 10 psig. The discharge gauge reads 48 psig. What is the head in feet the pump is working against?

  • 88
  • 38
  • 58
  • 96

24: What is used to check very low pressure?

  • Manometer
  • Velometer
  • Hydrometer
  • Hygrometer

25: What pipe can not be used for refrigeration?

  • N
  • L
  • M
  • K