Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 1 HP = ____ Watts?

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

2: A secondary coolant is defined as

  • a combination of interconnected parts from a closed circuit in where fluid is circulated for the purpose of cooling for a refrigeration system.
  • a low temperature refrigerant used for cascading systems
  • any refrigerant direcly in contact with the cooling space for process cooling
  • any liquid used for the transmission of heat without a change of state in A/C refrigeration systems having flash point above 150F

3: What measures gas pressure?

  • Hygrometer
  • Manometer
  • Barometer
  • Hydrometer

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

  • 100
  • 50
  • 1
  • 10

5: Ammonia systems use ____ pressure to adjust oil pressure

  • air
  • discharge
  • liquid
  • stream

6: Crankcase heaters are energized

  • while the compressor is running
  • to prevent compressor freeze-up
  • to allow easy compressor start-up
  • when the compressor is off

7: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Self-closing doors
  • Automatic ventilation

8: The start winding has _____ turns than the run winding.

  • more
  • less
  • the same
  • none of the above

9: The discharge relief valve is located (9.4.6)

  • between the compressor and oil separator
  • between the compressor and the stop valve
  • on top of the condensor
  • between the compressor and reciever

10: Halo-carbon refrigerants cannot be used with what material?

  • Aluminum
  • Stainless Steel
  • Copper
  • Magnesium alloy

11: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 24
  • 48
  • 36
  • 18

12: Dew point is

  • the temperature below which water vapor in the air will start to condense
  • the temperature below which water vapor in the air will start to evaporate
  • the temperature of air of 50% RH
  • the temperature above which water vapor in the air will start to condense

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

  • R-22
  • R-113
  • R-11
  • R-12

14: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

15: If a low-pressure chiller has a low-side leak, which of the following will most likely result?

  • High suction pressure and high discharge pressure.
  • Low suction pressure and low discharge pressure
  • Low head pressure and high suction pressure
  • High head pressure and low suction pressure

16: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 25
  • III
  • 15
  • 10

17: A movie theater would be considered a

  • mixed occupancy
  • institutional occupancy
  • commercial occupancy
  • public assembly occupancy

18: Where can 50/50 solder be used on?

  • suction line
  • liquid line
  • discharge line
  • none of the above

19: What would be the classification of a prison?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Institutional

20: The evaporator is a device to

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

21: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection as well as a temperature protection device
  • over pressure protection
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection and a rupture disc

22: 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

23: While water is evaporated in an evaporative condenser the impurities which were in the water are

  • remain in the air
  • washed out of the air by the spray pump
  • blown to the atmosphere by the fan
  • accumulate in the sump water

24: The boiling point of a refrigerant is based on

  • Temperature
  • Heat content
  • a pressure-temperature relationship
  • None of the above.

25: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 2.0
  • 3.0
  • 2.5