ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many gallons of water do you need per pound of ammonia?

  • 100
  • 10
  • 1
  • 50

2: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • design pressure
  • critical pressure
  • low pressure

3: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.25'
  • 7.00'
  • 9.00'
  • 8'4"

4: What type refrigerant is NOT ozone depleting?

  • Halon
  • HFC
  • HCFC
  • CFC

5: A relief valve discharge capacity is rated in

  • PSIG
  • PSIA
  • Pounds of air per minute.
  • temperature minus pounds of air per second divided by release rate squared

6: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

7: Name three things that must be done when changing refrigeration lubricant?

  • Place sign, check for leaks, insulate
  • You can't change lubricants.
  • Nothing must be done
  • Make sure it's compatible, notify owner, notify AHJ

8: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

9: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

10: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

11: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Stainless steel
  • Aluminum
  • Copper

12: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI

13: Class 3 refrigerants are

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

14: A High-Probablity system

  • 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
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space

15: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 800F
  • 700F
  • 600F
  • 1000F

16: When an inspection is needed, how often must it be done?

  • annually
  • every 18 months
  • every 24 months
  • every 36 months

17: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • tight fitting doors
  • self-closing doors
  • automatic ventilation

18: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 24
  • 18
  • 10
  • 15

19: The Board of Boilers adopts by reference

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

20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • nothing must be done
  • place sign, check for leaks, insulate
  • make sure it's compatible, notify owner, notify A.H.J
  • you can't change refrigerants

21: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

22: R-22 is considered a(n)

  • CFC
  • HCFC
  • HCFCH
  • HFC

23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • relief plug
  • fusion plug
  • rupture plug
  • fusible plug

24: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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

  • R-12
  • R-11
  • R-22
  • R-113