Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

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.