ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Can ammonia be used on domestic system?

  • no, unless there is proper ventilation system installed
  • no
  • yes, for systems under 10 tons
  • yes

2: Which refrigerant(s) is an HFC?

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

3: Machinery rooms must be vented to ______?

  • neutralizing tank
  • basement
  • outdoors
  • unoccupied spaces

4: What would be the classification for Stop & Shop grocery store?

  • Large mercantile
  • Place of assembly
  • Industrial
  • Instituional

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

  • True
  • False

6: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the compressor
  • on a conspicuous card located near the evaporator
  • inside the room, immediately adjacent to each door
  • outside the room, immediately adjacent to each door

7: Low temperature systems should have what?

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

8: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • mixed occupancy
  • commercial occupancy
  • public assembly occupancy
  • institutional occupancy

9: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • 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 form a failed connection or component of such system

10: What refrigerant is an inorganic compound?

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

11: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UR
  • UL and UM
  • UV or UR
  • UM or UL

12: What is the refrigerant dichlorodifluoromethane?

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

13: What is the minimum height refrigeration piping should be placed against walls?

  • 72"
  • 7.25'
  • Ceiling height
  • 6'

14: 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

15: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

16: R-11 belongs to Group

  • B-3
  • A-2
  • A-1
  • B-1

17: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • evaporator
  • outside the machinery room
  • compressor

18: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type L
  • Type N
  • Type K

19: Where must a refrigeration contractor's license number be displayed?

  • Truck, office, every job, and on all equipment
  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Trucks, invoices, and advertising

20: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.

21: B3 refrigerants are considered

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

22: 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

23: 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

24: What is a Category "M" fluid?

  • 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
  • Any fluid that exceeds 150 psig and has design temperatures over 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

25: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class M machinery room
  • Class A machinery room
  • Class T machinery room
  • Class B machinery room