ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Halogen refrigerants are corrosive to which type of metal?

  • magnesium
  • copper
  • stainless steel
  • black iron

2: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

3: What would be the classification of a prison?

  • Institutional
  • Place of assembly
  • Industrial
  • Large mercantile

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

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

5: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 50
  • 20
  • 75
  • 15

6: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

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

8: A class A3 refrigerant is considered

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

9: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 25
  • 10
  • 15
  • III

10: A hotel is considered a _______ occupancy.

  • institutional
  • residential
  • commercial
  • mercantile

11: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • explosion precautions must be taken
  • no flames shall be permitted
  • the owner shall be informed
  • gas masks must be worn

12: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 3/32"
  • 1/8"
  • 1/16"

13: 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

14: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

15: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1.2
  • 2.2
  • 1
  • 1.5

16: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • 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

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

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

18: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

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

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

20: R-11 belongs to Group

  • A-2
  • A-1
  • B-1
  • B-3

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

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

22: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

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

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

24: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 80
  • 100
  • 110
  • 90

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

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