Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 2 months
  • 14 days
  • 1 week
  • 30 days

2: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

3: In an electrical circuit, what is potential measured in?

  • Herys
  • Volts
  • Ohms
  • Amps

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

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

5: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

6: What does safe access mean?

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

7: How far from the ground does a relief valve need to be?

  • At least 15' above grade
  • At least 25' above grade
  • At least 20' above grade
  • Not more than 3' above grade

8: R-11 belongs to Group

  • A-1
  • B-3
  • A-2
  • B-1

9: The Board of Boilers adopts by reference

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

10: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class A machinery room
  • Class M machinery room
  • Class T machinery room
  • Class B machinery room

11: The high side float assembly meters refrigerant into the evaporator through the

  • upper chamber of the high side
  • lower chamber of the low side
  • upper chamber of the low side
  • lower chamber of the high side

12: R22 and 410A operate at the same range of condensing and evaporating temperatures

  • true
  • false

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

  • Reciprocating
  • Screw
  • Centrifugal
  • Scroll

14: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 10,000
  • 1,000
  • 100,000
  • 100

15: What type of material can't be used on the outlet of a relief valve?

  • Magnesium alloy
  • PVC
  • Copper
  • Stainless steel

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

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

17: Heat cannot of itself, pass from a

  • cold to a warmer body
  • warm to a colder body
  • state of hot energy to a state of cold energy
  • None of the above

18: Capacitors are rated in

  • micro-farads
  • kelvins
  • volt - amperes
  • megaohms

19: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 66
  • 22
  • 25
  • 50

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

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

21: An electrical circuit has a 208V power supply and draws 47 amps total, What would be the wattage of the circuit

  • 9.776 watts
  • 9,776 watts
  • 977.6 watts
  • .9776 watts

22: Refrigerant restricted in 2004 but used for transition for decades:

  • R-22
  • R-11
  • R-134A
  • R-123

23: 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.

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

24: Name a reason that does not cause reduced condenser air quantity

  • Dirty fan blades
  • High ambient temperature
  • Prevailing winds
  • Dirty Coil

25: What is not a requirement of a Class T machine room?

  • Automatic ventilation
  • Self-closing doors
  • Tight fitting doors
  • Fire hose connected to the building fire protection system.