Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: When should a relief valve start to function?

  • Before the purge station discharges
  • Two times it's working pressure
  • At it's set pressure
  • 10 psi before it's set pressure

2: Which is considered the more efficient condenser?

  • fan cooled
  • water cooled
  • spray cooled
  • air cooled

3: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the installing contractor
  • Approved by the authorized person

4: What is the purpose of a surge capacitor on a contactor?

  • to provide smoother start/stops
  • to protect low voltage equipment
  • to balance the sine waves
  • to keep the contactor pulled in

5: 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

6: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 44 lbs
  • 13.9 lbs
  • 22 lbs
  • 6.6 lbs

7: By using nitrogen within a pipe during brazing operation,

  • Discoloration is prevented
  • Exterior scale formation is minimized
  • The explosion hazard is confined
  • Copper oxide formation is prevented

8: In a motor, an internal overload might open if

  • there was a high pressure refrigerant was used for a low pressure system.
  • there's a direct short
  • there's an open start winding
  • there's an excess current draw through the motor

9: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall be inspected by the Boiler of Inspectors bi-annually
  • does not require a pressure-limiting device
  • shall have a pressure limiting device installed on the high side of the system
  • shall have a pressure limiting device and a pressure relief valve installed

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

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

11: Low pressure chiller systems use what type of compressor?

  • Screw
  • Centrifugal
  • Reciprocating
  • Scroll

12: Start to Run windings will have what resistance?

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

13: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

14: What chemical in the refrigerant set off the leak detection alarm?

  • Fluorine
  • Chlorine
  • Both A and B
  • none of the above

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

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

16: What would be the classification for Stop & Shop grocery store?

  • Place of assembly
  • Large mercantile
  • Industrial
  • Instituional

17: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?

  • 5/8"
  • 3/4"
  • 3/8"
  • 1/2"

18: Humidity can be sensed with

  • pressure bellows
  • bimetal
  • human hair
  • thermometer

19: Which refrigerant class listed below is the most flammable?

  • C3
  • B2
  • A3
  • A2

20: How much refrigerant can be stored in a mechanical room outside of the system?

  • 150
  • 100
  • 330
  • 200

21: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

22: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • 6'
  • 72"
  • Ceiling height

23: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 18
  • 50
  • 33

24: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 10
  • 20
  • 15
  • 25

25: The absorber shell contains the

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