Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: A rule of thumb in air conditioning is ____ CFM per ton?

  • 100
  • 600
  • 400
  • 500

2: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

3: A check valve is a device

  • designed to allow the flow of refrigerant gas in both directions
  • that is always spring loaded
  • with a pressure drop
  • found on high pressure steam systems

4: When must refrigeration system covered by the code be inspected?

  • Not required
  • Upon installation
  • Annually and when installed
  • Annually

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

  • 38F
  • 66F
  • 55F
  • 45F

6: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 18
  • 48
  • 24

7: A moisture indicator must

  • change color when exposed to moisture
  • be yellow
  • be filled with liquid
  • be sight side up

8: Heat is a form of

  • power
  • work
  • matter
  • energy

9: A R-22 system running with a condensing temperature of 110F and a 40F evaporator temperature will read pressures of ____ on the high side and ____ on the low side.

  • 257 psig, 77 psig
  • 226 psig, 68 psig
  • 350 psig, 120 psig
  • 455 psig, 185 psig

10: The start winding has _____ turns than the run winding.

  • more
  • less
  • the same
  • none of the above

11: What is not a requirement of a Class T machine room?

  • Automatic ventilation
  • Fire hose connected to the building fire protection system.
  • Self-closing doors
  • Tight fitting doors

12: Low ambient controls are used when

  • when systems run all year round
  • economizers are used
  • always
  • on air conditioning systems only

13: A compressor that increases vapor pressure by changing the internal volume of the compression chamber is called?

  • Low Pressure displacement
  • Pressure induced displacement.
  • Non-positive displacement
  • Positive displacement

14: Heat cannot of itself, pass from a

  • cold to a warmer body
  • warm to a colder body
  • state of hot energy to a state of cold energy
  • None of the above

15: 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

16: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

17: A class B2 refrigerant is considered

  • non-toxic and highly flammable
  • toxic and non-flammable
  • toxic and somewhat flammable
  • non-toxic and non-flammable

18: When should a relief valve start to function?

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

19: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

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

  • 3/8"
  • 3/4"
  • 1/2"
  • 5/8"

21: A High-Probability System

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

22: All electrical work done on refrigeration systems must comply with

  • Department of Energy
  • ASHREA-15 Section 9.2.1
  • OSHA
  • NEC and Massachusetts Modifications

23: What would be the classification of a prison?

  • Institutional
  • Place of assembly
  • Large mercantile
  • Industrial

24: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 99%
  • 90%
  • 80%
  • 75%

25: 1 Watt = ______ BTU's?

  • 12
  • 7.216
  • 4.482
  • 3.412