Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Who authorizes changes to the safety codes?

  • Contractor who last serviced the system.
  • Person in charge of the facility
  • Person who pulled the permit
  • Board of Boilers

2: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 33
  • 50
  • 18
  • 22

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

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

4: Watt's Law indicates Volts X Amps = _________.

  • Current
  • Watts
  • Ohms
  • Resistance

5: 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.

  • 100
  • 90
  • 110
  • 80

6: Low pressure chiller systems use what type of compressor?

  • Reciprocating
  • Scroll
  • Screw
  • Centrifugal

7: Fractionation occurs when

  • the pressures increase as the heat load increases
  • the pressures decreases as the heat load decreases
  • some of the blended refrigerant evaporates or condenses before the rest of the blend
  • when a fraction of refrigerant is added as the full charge

8: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

9: Megaohm meters can detect a ground in the

  • 10,000,000 ohms or higher
  • up to 1,000,000 ohms
  • up to 1,000 ohms
  • up to 10,000 ohms

10: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak from a failed connection or component of such system

11: What is considered a cooling agent?

  • any liquid used for the transmission of heat when condensation occur
  • any liquid used for the transmission of heat without vaporization
  • any liquid used for the transmission of heat without condensation
  • any liquid used for the transmission of heat when vaporization occurs

12: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • the owner shall be informed
  • explosion precautions must be taken
  • no flames shall be permitted
  • gas masks must be worn

13: What is the refrigerant chlorodifluoromethane?

  • R-22
  • R-134a
  • R-123
  • R-12

14: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

15: How would you know if there was a loss of crankcase pressure?

  • oil will thin out
  • oil will thicken
  • oil will foam
  • oil level will rise

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

  • Aluminum
  • Magnesium
  • Copper
  • Zinc

17: How does a centrifugal compressor create the pressure differential needed to move refrigerant through the system?

  • Suction and discharge valves
  • Nesting scrolls
  • Fan-like action
  • Rotating vanes

18: Refrigerant is metered into the evaporator on a large centrifugal chiller thru the

  • low side of the system
  • high side float assembly
  • cap tube
  • none of the above

19: What would be the classification of a prison?

  • Place of assembly
  • Large mercantile
  • Institutional
  • Industrial

20: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall be inspected by the Boiler of Inspectors bi-annually
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall have a pressure limiting device installed on the high side of the system

21: The certificate of inspection

  • shall be authorized by a notarized insurance company
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted and protected from dirt, water, and other elements
  • shall be posted on the compressor shell or electrical panel at the unit

22: An air conditioning system rated for 36,000 BTU's is equivalent to

  • one ton of cooling
  • 12,000 tons of cooling
  • two tons of cooling
  • three tons of cooling

23: What measures gas pressure?

  • Hygrometer
  • Manometer
  • Hydrometer
  • Barometer

24: How many flammability classifications are refrigerants in?

  • 5
  • 3
  • 2
  • 7

25: All low-pressure chillers use which type of compressor?

  • Rotary
  • Scroll
  • Centrifugal
  • Reciprocating