Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • 55F
  • 66F
  • 38F
  • 45F

2: Machinery rooms must be vented to ______?

  • basement
  • outdoors
  • unoccupied spaces
  • neutralizing tank

3: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • automatic ventilation
  • self-closing doors
  • tight fitting doors

4: A relief valve shall be located at least ___ above grade.

  • 15'
  • 36'
  • 25'
  • 10'

5: Aluminum, Zinc, Magnesium, or their alloys shall not be used in contact with

  • R-718
  • trichlorotrifluoromethane
  • methyl chloride
  • ammonia

6: Which refrigerant replaced R-12?

  • R-134A
  • R-407A
  • R-410A
  • R-22

7: The two basic types of evaporators are

  • prime surface and finned
  • direct expansion and plate
  • flooded and direct expansion
  • finned and plate

8: Give an example of a secondary coolant?

  • R-717
  • R-410A
  • R-718
  • R-12

9: "R" represents ___ in the Ohm's law formula

  • voltage
  • resistance
  • amperage
  • capacitance

10: What is the amp draw of a 40 VA transformer at 24 volts

  • 1.6 amps
  • 106 amps
  • 1,000 amps
  • 1K amps

11: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

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

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

13: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection
  • over pressure protection and a rupture disc
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection as well as a temperature protection device

14: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

15: In a horizontal shell & tube condenser, the ammonia is liquefied by

  • passing thru the tubes from top to bottom
  • removing the latent heat of fusion
  • water sprayed over condenser
  • removing the latent heat of vaporization

16: What type of voltage cause a potential relay to open?

  • 24 volt supply from the thermostat
  • 120 volt line voltage
  • Pick-up voltage
  • none of the above

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

  • nozzle
  • volute
  • suction
  • baffle

18: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 80
  • 90
  • 100
  • 110

19: When energized, a normally open relay will be

  • depends on the type and class of the relay
  • open
  • closed
  • noisy

20: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

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

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

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

22: Where would the EPR valve be located on a multiple evaporator system?

  • outlet of low temperature evaporator
  • outlet of the liquid line
  • inlet of the low temperature evaporator.
  • outlet of high temperature evaporator

23: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 3
  • 2
  • 5
  • 1

24: What is potential measured in?

  • Henrys
  • Amps
  • Ohms
  • Volts

25: What are the three components of a transformer?

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