ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

2: Class A refrigerants are considered

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

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

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

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

5: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space

6: Who is permitted to access a refrigeration machine room?

  • Anyone, it's a completely safe area
  • Authorized persons only
  • Any employee
  • Contractors only

7: A relief valve discharge capacity is rated in

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

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

  • Magnesium
  • Copper
  • Zinc
  • Aluminum

9: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

10: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

11: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • A-1
  • B-2
  • B-1

12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 660 lbs
  • 330 lbs
  • 500 lbs
  • 55 lbs

13: What refrigerant is an inorganic compound?

  • R-410A
  • R-22
  • Ammonia
  • R-132A

14: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

15: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

16: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

17: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Copper
  • Stainless steel
  • Aluminum

18: Which refrigerant class listed below is the most flammable?

  • A3
  • A2
  • B2
  • C3

19: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

20: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

21: Liquid level gauges must be provided with what?

  • A relief valve
  • A red line
  • A low level mark
  • Automatic shut-offs

22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the return air ducted system
  • the outdoors
  • the mechanical room housing the refrigeration system
  • Machinery rooms need not be vented

23: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

24: B3 refrigerants are considered

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

25: Machinery rooms must be vented to ______?

  • basement
  • neutralizing tank
  • unoccupied spaces
  • outdoors