ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 48
  • 18
  • 36
  • 24

2: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • welder qualified
  • licensed technician
  • competent welder
  • licensed welder

3: What refrigerant is an inorganic compound?

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

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

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

5: 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

6: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 1,000
  • 100
  • 100,000
  • 10,000

7: Joints in refrigeration piping must be _____ before being covered?

  • Inspected
  • Pressurized
  • Insulated
  • Leak tested

8: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 400
  • 100
  • 250
  • 350

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

  • 800F
  • 600F
  • 1000F
  • 700F

10: Low temperature systems should have what?

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

11: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Nickel
  • Zinc
  • Magnesium
  • Copper

12: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-502
  • R-113
  • R-12

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

  • A2
  • C3
  • B2
  • A3

14: What is an example of institutional occupancy?

  • Hospital
  • Dorms
  • Football stadium
  • Shopping mall

15: The Department that certifies the transportation of refrigerant is the

  • RSES
  • DOT
  • EPO
  • EPA

16: What type of relief valve is used on a CO2 system?

  • gate valve
  • fusible plug
  • glove disc
  • rupture disc

17: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall not be operated below prescribed pressures
  • it shall be approved by the owner for proper operation.

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

  • 10'
  • 15'
  • 25'
  • 36'

19: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 50
  • 100
  • 350

20: When air is ducted through a machine room that services occupied space, What must be done?

  • Ducted and sealed
  • Welded and seamed.
  • Insulated and cross broke
  • Flanged and gasketed

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

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

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

  • True
  • False

23: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Circuit Breaker
  • Relief valve
  • Temperature limiter device

24: A High-Probablity 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 occupied space
  • 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

25: A relief valve discharge capacity is rated in

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