Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The location of a thermal bulb of a TXV affects

  • subcooling
  • the amount of liquid in the condenser.
  • the amount of liquid refrigerant in the evaporator
  • the amount of liquid returning to the compressor

2: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the compressor
  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door
  • on a conspicuous card located near the evaporator

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

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

4: A hotel is considered a _______ occupancy.

  • institutional
  • commercial
  • mercantile
  • residential

5: A single pole-double throw switch uses how many wires?(excluding the ground)

  • 2
  • 3
  • 5
  • 4

6: When should a relief valve start to function?

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

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

  • 2.5
  • 3.0
  • 5.5
  • 2.0

8: Where must a refrigeration contractor's license number be displayed?

  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Truck, office, every job, and on all equipment
  • Trucks, invoices, and advertising

9: What type of pressure relief device is used on a CO2 system?

  • Gate valve
  • Fusible plug
  • Rupture disk
  • Glove valve

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

  • 5/8"
  • 3/8"
  • 3/4"
  • 1/2"

11: A movie theater would be considered a

  • commercial occupancy
  • public assembly occupancy
  • institutional occupancy
  • mixed occupancy

12: After setting up a forward curved fan for the desired conditions, something happened to lower the total static pressure the fan had to operate against. Which would occur?

  • CFM and RPM decrease
  • CFM and HP increase
  • RPM and CFM increase
  • CFM and HP decrease

13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 330 lbs.
  • 550 lbs
  • 55 lbs
  • 660 lbs

14: Electricity involves the movement of electrons in atoms

  • True
  • False

15: What are the three components of a transformer?

  • Contacts, secondary coil, and core
  • Primary coil, secondary coil, and copper contacts
  • Primary core, secondary coil, and high and low voltage connectors.
  • Primary coil, secondary coil, and core

16: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 330 lbs
  • 500 lbs
  • 660 lbs

17: A micron is

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

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

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

19: Who is permitted to access a refrigeration machine room?

  • Anyone, it's a completely safe area
  • Any employee
  • Contractors only
  • Authorized persons only

20: What refrigerant doesn't have to be classified?

  • R-717
  • R-422A
  • R-718
  • R-134A

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

  • 400
  • 100
  • 600
  • 500

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

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

23: What is a high-side float?

  • Located in the liquid line entering the evaporator, so when the refrigerant level is higher in the liquid line than the evaporator, the float rises to allow more refrigerant flow into the evaporator
  • Located in the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the low side of the chiller
  • An electronic-type metering device that contains a float assembly within the device which can accurately meter refrigerant into the evaporator as the load varies
  • Located in the liquid line entering the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the high side of the chiller

24: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • high and low pressure controls

25: Most CFC's are

  • flammable
  • inert
  • inert but toxic
  • toxic