Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall be prohibited

2: Capacity control on an absorption system is typically accomplished by varying the

  • speed of the chilled water circulatory pump
  • pressure setting on the system's rupture disc
  • speed of the condenser water circulator pump
  • rate at which heat is supplied to the generator

3: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

4: An electronic bridge circuit is basically a

  • 24 volt control circuit
  • Wheatstone
  • high voltage circuit
  • suspension

5: What would be the classification of a prison?

  • Industrial
  • Institutional
  • Large mercantile
  • Place of assembly

6: The purpose of a receiver is

  • a vessel to store refrigerant outside the system
  • to increase the capacity that the system can hold
  • to use a a later date
  • all of the above

7: What is the amp draw of a 40 VA transformer at 24 volts

  • 1,000 amps
  • 1.6 amps
  • 106 amps
  • 1K amps

8: How many groups of refrigerants are there?

  • 7
  • 5
  • 3
  • 1

9: Bubbles in the liquid line sight glass could be caused by

  • bad low pressure switch
  • leaking discharge valves in the compressor
  • plugged drier
  • overcharge of oil

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

  • amperage
  • voltage
  • reactance
  • watts

11: A secondary coolant is defined as

  • any liquid used for the transmission of heat without a change of state in A/C refrigeration systems having flash point above 150F
  • any refrigerant direcly in contact with the cooling space for process cooling
  • 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

12: Ammonia is under what safety classification?

  • B1
  • A3
  • B2
  • B3

13: A class B2 refrigerant is considered

  • toxic and non-flammable
  • non-toxic and highly flammable
  • toxic and somewhat flammable
  • non-toxic and non-flammable

14: Class T machine room

  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • shall include closets used for setting equipment

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

  • True
  • False

16: Pairs of mating stop valves that allow sections of a system to be joined before opening these valves or separated after closing them are

  • gate or globe valves
  • ball valves
  • companion or block valves
  • king valves

17: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • 2.5 times the design pressure
  • the low side
  • the aggregate of the high side and low side

18: Low ambient controls are used when

  • when systems run all year round
  • economizers are used
  • on air conditioning systems only
  • always

19: When must refrigeration system covered by the code be inspected?

  • Annually
  • Not required
  • Annually and when installed
  • Upon installation

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

  • Rotary
  • Reciprocating
  • Centrifugal
  • Scroll

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

  • start capacitor
  • start
  • common
  • run

22: What is an example of institutional occupancy?

  • Hospital
  • Shopping mall
  • Dorms
  • Football stadium

23: What is the leaving chilled water set point for water chiller systems?

  • 38F
  • 45F
  • 55F
  • 66F

24: What is considered a cooling agent?

  • 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 vaporization occurs
  • any liquid used for the transmission of heat when condensation occur

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

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