Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • series
  • junction
  • series-parallel
  • parallel

2: Brazed joints melt at temperatures above

  • 1,000F
  • 500F
  • 1,200F
  • 800F

3: Class A refrigerants are considered

  • non-toxic
  • toxic
  • flammable
  • non-flammable

4: R-22 is considered a(n)

  • HFC
  • HCFCH
  • CFC
  • HCFC

5: What refrigerant is an inorganic compound?

  • Ammonia
  • R-22
  • R-410A
  • R-132A

6: What should never be used in pressure testing refrigeration systems?

  • Oxygen
  • Compressed air
  • Nitrogen
  • Both a and b

7: A 50 VA control transformer with a 25 volt control output would be rated for _________ amps.

  • 2.5
  • There isn't enough information to answer.
  • 1250
  • 2

8: A class B2 refrigerant is considered

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

9: What is the voltage of each leg of a 480 Volt three-phase motor?

  • 240v
  • 208v
  • 120v
  • 277v

10: What is the state of the refrigerant leaving the evaporator?

  • a low temperature subcooled liquid
  • a high temperature superheated vapor
  • a high temperature subcooled liquid
  • low temperature superheated vapor

11: "E" references ____ in the Ohm's law formula

  • voltage
  • amperage
  • capacitance
  • resistance

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

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

13: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 350
  • 100
  • 400
  • 250

14: A motor starter is a device that includes an overload and a _______?

  • contactor
  • 2-pole contacts
  • duel-coil
  • all of the above

15: Most CFC's are

  • toxic
  • inert
  • inert but toxic
  • flammable

16: The generator shell contains the

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

17: 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

18: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • Lithium bromide
  • ammonia
  • HCFC-123
  • CFC-11

19: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

20: The Board of Boilers adopts by reference

  • the 1997 ANSI/ASHRAE Safety Code
  • Montreal Protocol Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code

21: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

22: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

23: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

24: The equivalent length of pipe in a water piping system is

  • the total length of pipe as you would measure it
  • the total length of pipe plus equivalent-length of fittings
  • the total length of pipe as you would measure it plus 25% for fittigns
  • the total length of pipe plus equivalent of fittings multiplied by 2.31

25: Refrigeration piping before being buried shall be

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