Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Pairs of mating stop valves that allow sections of a system to be joined before opening these valves or separated after closing them are

  • king valves
  • companion or block valves
  • gate or globe valves
  • ball valves

2: A start capacitor is wired in _____ with the start windings.

  • series-parallel
  • parallel
  • junction
  • series

3: The outer portion of shell of the compressor used on low-pressure chillers is called the

  • baffle
  • nozzle
  • suction
  • volute

4: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 9.00'
  • 8'4"
  • 7.25'
  • 7.00'

5: Doors communicating with outside from a mechanical room must be?

  • Self-closing, wooden, fire door
  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door
  • Self-closing, approved, fire door

6: "I" represents ____ in the Ohm's law formula.

  • voltage.
  • resistance
  • capacitance
  • amperage

7: The measurement of heat in a particular substance is

  • enthalpy
  • sensible heat
  • specific heat
  • latent heat

8: 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

9: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

10: What type refrigerant is NOT ozone depleting?

  • HFC
  • CFC
  • Halon
  • HCFC

11: The rupture disc on a low-pressure chiller typically releases pressure at

  • 0 psig
  • 15 psig
  • 10 psig
  • 5 psig

12: In designing duct work, pressure and ______ need to be considered

  • length
  • CFM
  • duct sealant used
  • all of the above

13: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • commercial occupancy
  • business occupancy
  • public assembly occupancy.
  • mercantile occupancy

14: What happens after your initial inspection of a pressure vessel?

  • Inspector leaves a metal tag with a certification listed on it
  • There is a temporary shut-down until a final inspection can be performed.
  • Notify the AHJ to let them know that the system been inspected
  • Notify the Fire Marshal that the system has been inspected and approved

15: How can you test mechanical strength of an electrical connection?

  • measure ohms with an electrical meter
  • measure voltage across the connection
  • attempt to pull the wire from the connector by hand
  • none of the above.

16: _____ and its alloys are suitable for use with ammonia systems.

  • Zinc
  • Aluminum
  • Magnesium
  • Copper

17: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there are sprinklers above
  • When there is a space 6' or more above it
  • When it's used as part of a supply or return air system
  • When its white

18: In an A/C unit, dirty filters will cause

  • high discharge pressure
  • low oil pressure
  • low suction pressure
  • high suction pressur

19: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are

  • sight glass, weight, pressure, and frost line
  • Buss-eye, weight, pressure, and frost line
  • sight glass, weight, pressure, and dipstick
  • sight glass, weight, paper method, and frost line.

20: The amount of heat required to raise the temperature of 1 lb of water 1F is?

  • The rate of conduction
  • 1 Kelvin
  • 1 Therm
  • 1 BTU

21: The normal operating evaporator temperature of R-410A for air conditioning is typically

  • 158F
  • 32F
  • 45F
  • 155F

22: Three-phase motors have what type of windings?

  • three start windings
  • three run windings and 3 start windings
  • one start winding and one run winding.
  • three run windings

23: A hissing noise at the expansion valve is a good indication that

  • expansion valve is oversized
  • gas is passing thru it
  • liquid is passing thru it
  • nothing is passing thru

24: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-717
  • R-711
  • R-718

25: Which occupancy can ammonia be used in?

  • depends on the quantity of freon
  • commercial
  • redifential
  • industrial