ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 10'
  • 25'
  • 15'
  • 36'

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

  • 55 lbs
  • 660 lbs
  • 550 lbs
  • 330 lbs.

3: Evaporators within 18" of a heating coil must be equipped with a

  • high limit control
  • low limit control
  • pressure relief device
  • zone valve

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

  • True
  • False

5: What type refrigerant is NOT ozone depleting?

  • CFC
  • HCFC
  • Halon
  • HFC

6: Pressure vessels with an internal volume of 3 cubic feet or less

  • shall use pressure relief devices
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • do not need pressure relief protection

7: What is an egress?

  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • An escape route
  • A code violation

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

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

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

  • B2
  • A3
  • A2
  • C3

10: 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

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

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

12: What is a Category "D" fluid?

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

13: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.25'
  • 9.00'
  • 8'4"
  • 7.00'

14: What is not a requirement of a Class T machine room?

  • Self-closing doors
  • Tight fitting doors
  • Automatic ventilation
  • Fire hose connected to the building fire protection system.

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

  • Copper
  • Magnesium
  • Aluminum
  • Zinc

16: 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

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

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

18: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 330
  • 1,000
  • 6.6
  • 110

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

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

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

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

21: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

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

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

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

  • Leak tested
  • Inspected
  • Pressurized
  • Insulated

24: What would be the classification of a church?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Institutional

25: A hotel is considered a _______ occupancy.

  • institutional
  • commercial
  • residential
  • mercantile