Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • 38F
  • 45F
  • 55F
  • 66F

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

  • 50
  • 1
  • 10
  • 100

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

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

4: In an electrical circuit, what is potential measured in?

  • Volts
  • Amps
  • Herys
  • Ohms

5: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • high limit control
  • zone valve
  • pressure relief device

6: What section of ASHRAE-15 governs pressure vessels?

  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired
  • OSHA

7: If the power element on an expansion valve should lose its charge, the valve would

  • Over feed
  • Stay open
  • Close
  • Under feed

8: How can you test mechanical strength of an electrical connection?

  • measure ohms with an electrical meter
  • measure voltage across the connection
  • attempt to pull the wire from the connector by hand
  • none of the above.

9: If the power element of an expansion valve should lose its charge the valve would

  • go closed
  • underfeed the evaporator
  • overfeed the evaporator
  • go open

10: A cross charged power element on an expansion valve would normally be used in what temperature range?

  • -100F to -40F
  • 0F-38F
  • -40F to 0F
  • 30F to 50F

11: What type refrigerant is NOT ozone depleting?

  • HCFC
  • HFC
  • Halon
  • CFC

12: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

13: The best way to determine the voltage requirement for an electrical component is to

  • read the nameplate data
  • determine the capacity of the service panel
  • check with the utility company
  • read the voltage with a mulitmeter

14: Each machinery room shall contain

  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate

15: Which refrigerant is lighter than air?

  • R-134a
  • R-11
  • R-123
  • R-717

16: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

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

17: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?

  • 144 BTU
  • 970 BTU
  • 24,000 BTU
  • 12,000 BTU

18: A 24 volt transformer with a 240 volt primary can handle how many amps?

  • 20 amps
  • 24 amps
  • There isn't enough information to answer.
  • 10 amps

19: What is absolute humidity?

  • the amount of moisture in the air per one pound of 50% RH air
  • the amount of moisture in the air in grains of cubic feet of volume
  • the amount of moisture in the air in grains of square feet of volume
  • none of the above

20: Class T machine room

  • shall include closets used for setting equipment
  • 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

21: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • lower
  • there is no Group B1 refrigerants
  • higher
  • the same

22: R-22 falls under which safety classification?

  • A-2
  • B-1
  • A-1
  • B-2

23: The location of a thermal bulb of a TXV affects

  • the amount of liquid refrigerant in the evaporator
  • the amount of liquid returning to the compressor
  • subcooling
  • the amount of liquid in the condenser.

24: What type of pressure relief device is used on a CO2 system?

  • Gate valve
  • Rupture disk
  • Glove valve
  • Fusible plug

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

  • indirect
  • cascade
  • booster
  • single stage