ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • Magnesium
  • Copper
  • Zinc
  • Aluminum

2: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Muffler
  • Moisture indicator
  • Stop valve

3: R-22 is considered a(n)

  • HCFC
  • CFC
  • HCFCH
  • HFC

4: Where a refrigeration or air conditioning system is installed,

  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • it shall not be operated below prescribed pressuers
  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety

5: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs

6: What do you need to do when you install a new system?

  • Document the superheat and subcooling reading
  • Add refrigerant
  • Insulate the suction line before you take a superheat reading
  • Have it inspected

7: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 33
  • 18
  • 50

8: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

9: How many CFMs are required per square foot of commercial office occupied space

  • 20 CFM
  • 15 CFM
  • 5 CFM
  • .5 CFM

10: Pressure relief valves shall be marked with the data from

  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code

11: Most CFC's are

  • flammable
  • inert but toxic
  • toxic
  • inert

12: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

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

  • 36
  • 24
  • 48
  • 18

14: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

15: What pipe can not be used for refrigeration?

  • L
  • K
  • N
  • M

16: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

17: 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

18: 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

19: 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
  • 10,000
  • 100,000
  • 100

20: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • regularly
  • quarterly
  • annually
  • bi-annually

21: What is a Category "D" fluid?

  • 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
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact

22: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-711
  • R-717
  • R-718

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

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

24: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code

25: R-717 is

  • carbon dioxide
  • ammonia
  • trichloromethane
  • water