Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

2: Where is the high-side float located on a chiller system?

  • inside the chiller barrel
  • flash line
  • discharge line
  • liquid line

3: 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

4: What does safe access mean?

  • OSHA approved
  • Well-lit exit signs
  • A clear unobstructed path to the equipment and controls
  • Locked doors

5: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • CO Sensing
  • A group sensing
  • phosgene gas sening
  • refrigerant sensing

6: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise

7: How are a compressor and condenser fan wired?

  • series
  • parallel-series
  • series-parallel
  • parallel

8: R-22 is considered a(n)

  • HCFCH
  • CFC
  • HCFC
  • HFC

9: To determine the pump size needed for an open cooling tower system, the following must be known,

  • GPM and balanced head and friction head
  • GPM and unbalanced head and friction head
  • GPM and friction head
  • GPM, pipe size, and equivalent head.

10: The principle used in continuous type absorption systems is

  • Dalton's Law
  • Ohm's Law
  • Boyle's Law
  • Charles's Law

11: If two 500 ohm resistors are connected in series, the resistance will be

  • 20 ohms
  • 500 ohms
  • 1000 ohms
  • 200 ohms

12: Horizontal piping should be run level.

  • False
  • Yes, if the condenser is located above the evaporator
  • No, unless the supervisor on the job says so.
  • True

13: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-11
  • R-113
  • R-22
  • R-12

14: Where can 50/50 solder be used on?

  • suction line
  • liquid line
  • discharge line
  • none of the above

15: What is absolute humidity?

  • the amount of moisture in the air per one pound of 50% RH air
  • the amount of moisture in the air in grains of cubic feet of volume
  • the amount of moisture in the air in grains of square feet of volume
  • none of the above

16: Pi equals approximately

  • 3.14
  • 3.41
  • 12,000
  • 746

17: Can you use Ammonia in industrial applications?

  • Yes, Under certain condidtions
  • When mixed with R-718
  • No, never
  • Yes, always

18: Capacity control on a centrifugal compressor is accomplished by the

  • slide vanes
  • pre-rotational guide vanes
  • check valves
  • post-rotational guide vanes

19: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Copper
  • Stainless steel

20: When using nitrogen for brazing, the pressure should be:

  • Very low
  • Slightly below atmospheric
  • 125 psig
  • 50-100 psig

21: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 3 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or less

22: A cross charged power element on an expansion valve would normally be used in what temperature range?

  • 0F-38F
  • 30F to 50F
  • -40F to 0F
  • -100F to -40F

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

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

24: A class B1 refrigerant is considered

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

25: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above