ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A High-Probablity system

  • is a system highly likely to leak from a failed connection or component of such 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 unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space

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

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

3: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • is a reciprocating type compressor with 2 or more pistons

4: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 30 days
  • 14 days
  • 1 week
  • 2 months

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

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

6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

7: 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

8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • critical pressure
  • design pressure
  • high pressure
  • low pressure

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

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

10: What section of ASHRAE-15 governs pressure vessels?

  • OSHA
  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired

11: What refrigerant were phased out in 2004?

  • R-22
  • R-11
  • R-12
  • R-134a

12: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-113
  • R-11
  • R-12

13: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

14: 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.

  • 100
  • 50
  • 350
  • 550

15: R-22 falls under which safety classification?

  • A-2
  • B-1
  • B-2
  • A-1

16: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

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

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

18: What is R-22?

  • Chlorofluoromethane
  • HFC
  • CCFCM
  • Chlorodifluoromethane

19: 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

  • outside the machinery room
  • evaporator
  • boiler
  • compressor

20: Most CFC's are

  • inert
  • flammable
  • inert but toxic
  • toxic

21: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room

22: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • refrigerant sensing
  • A group sensing
  • phosgene gas sening
  • CO Sensing

23: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

24: 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.

25: Name three things that must be done when changing refrigeration lubricant?

  • Make sure it's compatible, notify owner, notify AHJ
  • You can't change lubricants.
  • Place sign, check for leaks, insulate
  • Nothing must be done