Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • 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
  • over pressure protection as well as a temperature protection device

2: 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.

3: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • the liquid side of the system
  • high side of the system
  • low side of the system

4: A thermometer inside a duct measures ____ heat.

  • specific
  • sensible
  • latent
  • hidden

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

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

6: High side floats are used on centrifugal chiller systems are are considered critically charged systems.

  • True
  • False
  • are obsolete.
  • depends on the type of refrigerant being used

7: The absorber shell contains the

  • evaporator and the absorber
  • condenser, the evaporator, and the generator
  • condenser and the absorber
  • condenser and the generator

8: Cooling tower lowers condenser water temp by

  • condensation
  • running water thru a secondary heat exchanger
  • evaporative cooling
  • running fans at 100%

9: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • CO Sensing
  • phosgene gas sening
  • A group sensing
  • refrigerant sensing

10: What measures gas pressure?

  • Hygrometer
  • Manometer
  • Barometer
  • Hydrometer

11: An electronic bridge circuit is basically a

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

12: A micron is

  • one millonths of a centimeter
  • one millonths of a micrometer
  • a larger unit of measurement than Hg
  • one thousandths of a millimeter

13: The equivalent length of pipe in a water piping system is

  • the total length of pipe as you would measure it
  • the total length of pipe plus equivalent-length of fittings
  • the total length of pipe plus equivalent of fittings multiplied by 2.31
  • the total length of pipe as you would measure it plus 25% for fittigns

14: A thermometer placed in a supply air duct measures

  • latent heat
  • specific heat
  • sensible heat
  • air velocity x temperature squared.

15: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

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

  • 2.0
  • 2.5
  • 3.0
  • 5.5

17: What is an egress?

  • An entrance or exit
  • An escape route
  • A code violation
  • A valve put on the low side of the system to prevent frosting

18: What should never be used in pressure testing refrigeration systems?

  • Oxygen
  • Compressed air
  • Nitrogen
  • Both a and b

19: 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

20: While the system is operating, the discharge line should be

  • 10-15F warmer than ambient
  • too hot to hold by hand
  • at the same temperature as the crankcase
  • room temperature

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

  • Hydrometer
  • Manometer
  • Thermometer
  • Hygrometer

22: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • Place sign, check for leaks, and insulate suction line
  • you can never change refrigerants

23: What does safe access mean?

  • A clear unobstructed path to the equipment and controls
  • Well-lit exit signs
  • Locked doors
  • OSHA approved

24: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

25: Start to Run windings will have what resistance?

  • The least resistance value
  • All will be at equal values
  • The most resistance value
  • Somewhere between the actual start winding and run winding resistance value