ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

2: A class B2 refrigerant is considered

  • toxic and non-flammable
  • non-toxic and non-flammable
  • non-toxic and highly flammable
  • toxic and somewhat flammable

3: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

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

  • 22
  • 18
  • 50
  • 33

5: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

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

  • PVC
  • Magnesium alloy
  • Stainless steel
  • Copper

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

  • 100
  • 1
  • 10
  • 50

8: The color code of a tank of ammonia is

  • silver
  • white
  • light green
  • lavender

9: What is the refrigerant dichlorodifluoromethane?

  • R-12
  • R-22
  • R-134A
  • R-123

10: How are refrigerant blends classified?

  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Based on the oil used

11: A relief valve discharge capacity is rated in

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

12: A High-Probablity system

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

13: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's a non-flammable refrigerant
  • Because it's water
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant

14: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Aluminum
  • Copper
  • Magnesium alloy

15: Fusible plugs shall not be used with pressure vessels of

  • 3 cubic feet or less
  • 15 cubic feet or more
  • 3 cubic feet or more
  • 15 square feet or less

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

  • R-22
  • R-113
  • R-11
  • R-12

17: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 65 lbs
  • 120 lbs
  • 110 lbs

18: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Magnesium alloy
  • Copper
  • Aluminum

19: 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.

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

20: B3 refrigerants are considered

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

21: Class 3 refrigerants are

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

22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

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

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

24: A relief valve shall be located at least ___ above grade.

  • 25'
  • 10'
  • 36'
  • 15'

25: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above