Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • 108
  • 116
  • 88
  • 38

2: 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

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

3: One ton of refrigeration is defined as ______ btu/minute.

  • 60
  • 12,000
  • 200
  • 720,000

4: An example of an "Expendable Refrigerant" is

  • liquid nitrogen
  • liquid oxygen
  • ammonia
  • lithium bromide

5: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

6: An accumulator can be located between the

  • evaporator and compressor
  • compressor and condenser
  • first stage and second stage compressors
  • condenser and evaporator

7: A 120 volt motor rated at 1,800 watts. You find the motor is drawings 25 amps. The motor is

  • drawing RLA and is running as it should
  • drawing LRA and is seized and should be replaced.
  • running hot
  • none of the above

8: What would be the classification of a prison?

  • Institutional
  • Place of assembly
  • Large mercantile
  • Industrial

9: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • CFC-11
  • Lithium bromide
  • HCFC-123
  • ammonia

10: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code

11: What type of relief valve is used on a CO2 system?

  • fusible plug
  • gate valve
  • rupture disc
  • glove disc

12: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

13: What is used to check very low air pressures in air conditioning duct?

  • Manometer
  • Vacuum gauge
  • Anemomter
  • Barometer

14: Two systems using separate refrigerants that are superimposed upon one another is called

  • single stage
  • indirect
  • booster
  • cascade

15: The proper location for an oil separator is between the

  • compressor and condenser
  • receiver and metering device
  • condenser and receiver
  • evaporator and compressor

16: The boiling point of a refrigerant is based on

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

17: A start capacitor in series with a start winding will

  • decrease the amp draw of the motor
  • increase the amp draw of the motor
  • increase running efficiency
  • increase starting torque

18: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 66
  • 22
  • 25
  • 50

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

  • 36
  • 18
  • 24
  • 48

20: What instrument is used to measure very high resistance?

  • meg ohmmeter
  • ammeter
  • tape measure
  • voltmeter

21: What device measures the specific gravity of a substance?

  • Thermometer
  • Hygrometer
  • Hydrometer
  • Manometer

22: It takes how many BTU/hr to melt one pound of ice at 32F

  • 180
  • 970
  • 212
  • 144

23: High pressure controls should be set no higher than

  • 25% of set point
  • 10% of set point
  • 90% of set point
  • 80% of set point

24: 1 HP = ____ Watts?

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

25: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • inside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • on a conspicuous card located near the evaporator
  • outside the room, immediately adjacent to each door