ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: How many flammability classifications are refrigerants in?

  • 5
  • 3
  • 7
  • 2

3: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 25
  • 22
  • 66
  • 50

4: Who approves containers for refrigerants?

  • E.P.A
  • D.O.E
  • D.O.T
  • D.O.D

5: R-22 is considered a(n)

  • HCFCH
  • CFC
  • HFC
  • HCFC

6: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

7: Fusible plugs must have what marked on them?

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

8: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 75%
  • 80%
  • 90%
  • 100%

9: How many refrigerant classifications are there for toxicity?

  • 5
  • 2
  • 3
  • 1

10: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

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

  • RSES
  • EPO
  • EPA
  • DOT

12: Each machinery room shall contain

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

13: Pressure vessels with an internal volume of 3 cubic feet or more

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

14: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • the liquid side of the system
  • high side of the system
  • the vapor side of the system

15: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

16: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • commercial occupancy
  • public assembly occupancy.
  • mercantile occupancy
  • business occupancy

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

18: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system less than 1,000 lbs
  • 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 for mechanical equipment only

19: What is the refrigerant chlorodifluoromethane?

  • R-22
  • R-134a
  • R-123
  • R-12

20: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

21: 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
  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

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

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

23: Machinery rooms must be vented to ______?

  • basement
  • outdoors
  • neutralizing tank
  • unoccupied spaces

24: Stop valves shall not be permitted between the system and the

  • condenser
  • relief valve
  • bleed valve
  • service valve

25: What does safe access mean?

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