Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: How is bring measured?

  • anemometer
  • manometer
  • hydrometer
  • hygrometer

2: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices

3: Can ammonia be used on domestic system?

  • yes, for systems under 10 tons
  • no, unless there is proper ventilation system installed
  • no
  • yes

4: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

5: How many different groups of refrigerants are there?

  • 7
  • 3
  • 15
  • 11

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

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

7: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

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

  • Ohms
  • Herys
  • Volts
  • Amps

9: A declaration test is needed when the system contains more than

  • 55 lbs
  • 120 lbs
  • 110 lbs
  • 65 lbs

10: 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
  • king valves
  • companion or block valves

11: The two float-type metering devices are the

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

12: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

13: The high side float assembly meters refrigerant into the evaporator through the

  • upper chamber of the high side
  • lower chamber of the low side
  • upper chamber of the low side
  • lower chamber of the high side

14: Transformers are rated in

  • volts-ohms
  • volt-amps
  • amps
  • volts

15: Lithium-bromide, Li-Br, is best characterized as a

  • salt
  • soil
  • sugar
  • sand

16: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 660 lbs
  • 550 lbs
  • 330 lbs.

17: Refrigerants shall be classified by

  • color codes
  • toxicity and flammability
  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group

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

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

19: Machinery rooms must be vented to ______?

  • outdoors
  • neutralizing tank
  • unoccupied spaces
  • basement

20: The color code of a tank of ammonia is

  • lavender
  • silver
  • white
  • light green

21: On a large centrifugal system, what meters the flow to the evaporator?

  • Low side float
  • Cap tube.
  • TXV
  • High side float

22: An air conditioning system rated for 36,000 BTU's is equivalent to

  • 12,000 tons of cooling
  • one ton of cooling
  • two tons of cooling
  • three tons of cooling

23: R-11 belongs to Group

  • A-2
  • A-1
  • B-1
  • B-3

24: Electricity involves the movement of electrons in atoms

  • True
  • False

25: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above