Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Heat is a form of

  • energy
  • matter
  • work
  • power

2: Pressure relief valves shall be marked with the data from

  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code

3: Liquid level gauges must be provided with what?

  • A red line
  • A relief valve
  • Automatic shut-offs
  • A low level mark

4: While water is evaporated in an evaporative condenser the impurities which were in the water are

  • accumulate in the sump water
  • washed out of the air by the spray pump
  • blown to the atmosphere by the fan
  • remain in the air

5: How many different groups of refrigerants are there?

  • 11
  • 7
  • 3
  • 15

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

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

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

  • True
  • False

8: Clearance volume

  • varies depending on compressor speed
  • has no effect on compressor capacity
  • affects compressor capacity
  • is the same on all compressors

9: Color is important in oil because

  • can tell us something about the refining of oil
  • it indicates the viscoisty.
  • it makes sight glasses easy to read
  • allows you to see into crankcase

10: A Lithium-bromide system is an absorption system that

  • uses water as a absorbent and lithium bromide as a refrigerant
  • uses water as a refrigerant and lithium bromide as an absorbent
  • uses ammonia as a refrigerant and lithium bromide as an absorbent
  • uses salts as an absorbent and lithium bromide as a refrigerant

11: Most CFC's are

  • flammable
  • inert but toxic
  • toxic
  • inert

12: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

13: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used for mechanical equipment only
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used in refrigeration system less than 1,000 lbs

14: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

15: A split-phase motor has a ______ winding and a ____ winding

  • start, common
  • run, common
  • run, start
  • duel-run, duel-start

16: An example of an "Expendable Refrigerant" is

  • lithium bromide
  • liquid nitrogen
  • ammonia
  • liquid oxygen

17: What would be the classification of a church?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Institutional

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

  • sugar
  • sand
  • soil
  • salt

19: When an A/C system is excessively low on refrigerant

  • it can become contaminated with water
  • there can be nuisance trip outs
  • the suction line may be too hot to touch
  • All of the above

20: In an ammonia refrigerating system, how is oil pressure adjusted?

  • Outlet of pump
  • Inlet of pump
  • Spring tension of a pressure regulating valve
  • Both a & b are correct

21: When an inspection is needed, how often must it be done?

  • every 36 months
  • annually
  • every 24 months
  • every 18 months

22: What measures gas pressure?

  • Barometer
  • Hygrometer
  • Hydrometer
  • Manometer

23: What is the purpose of a trap in a vertical discharge line with an upward flow?

  • start the flow of oil throughout the system
  • ensure proper oil return to the compressor
  • Installing a vertical discharge line with an upward flow is prohibited by code
  • None of the above

24: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?

  • 277v
  • 240v
  • 208v
  • 120v

25: What type of voltage causes the winding in a potential relay to open?

  • BEMF (Back Electro-Motive Force)
  • 24V control voltage from the thermostat
  • 120V line voltage
  • None of the above