ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Indirect systems using Group II refrigerants

  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used in refrigeration system less than 1,000 lbs
  • shall be used for mechanical equipment only

2: Each machinery room shall contain

  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • high and low pressure controls
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

3: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • .5 CFM
  • 20 CFM
  • 5 CFM

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

  • R-11
  • R-12
  • R-22
  • R-113

5: What is a Category "M" fluid?

  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content

6: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

7: Class T machine room

  • shall include closets used for setting equipment
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room

8: What is Trichlorotrifluoromethane?

  • R-12
  • R-113
  • R-13
  • R-11

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

  • Copper
  • Magnesium alloy
  • Aluminum
  • Stainless Steel

10: What does safe access mean?

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

11: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

12: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

13: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 15
  • 10
  • 25

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

  • Zinc
  • Aluminum
  • Copper
  • Magnesium

15: What refrigerant doesn't have to be classified?

  • R-718
  • R-422A
  • R-717
  • R-134A

16: Ammonia is under what safety classification?

  • A3
  • B2
  • B1
  • B3

17: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

18: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Glove valve
  • Gate valve
  • Rupture disk

19: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 36
  • 18
  • 24

20: Name a CFC refrigerant(s):

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

21: NH3 is

  • ammonia
  • R-508A
  • lithium bromide
  • R-718

22: Which occupancy can ammonia be used in?

  • industrial
  • redifential
  • depends on the quantity of freon
  • commercial

23: A restaurant is classified as a

  • public assembly occupancy
  • commercial occupancy
  • large mercantile occupancy
  • mixed occupancy

24: Most CFC's are

  • inert but toxic
  • flammable
  • toxic
  • inert

25: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 100%
  • 80%
  • 90%
  • 75%