ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When should a relief valve start to function?

  • At it's set pressure
  • 10 psi before it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges

2: What would be the classification of a prison?

  • Institutional
  • Industrial
  • Large mercantile
  • Place of assembly

3: Ammonia can come in contact with _______ ?

  • Brass
  • Copper tubing
  • Copper
  • Aluminum

4: How many gallons of water per pound of ammonia do you need?

  • 15
  • 20
  • 1
  • 5

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

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

6: What is a Category "M" fluid?

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

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

  • 10'
  • 15'
  • 36'
  • 25'

8: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

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

  • 100%
  • 80%
  • 75%
  • 90%

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

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

11: How much clearance do you need around the perimeter of electrical panels?

  • 36"
  • 24"
  • 18"
  • 12"

12: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UV or UR
  • UL and UM
  • UM or UL
  • UL and UR

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

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

14: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

15: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

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

  • Foot valve
  • Stop valve
  • Muffler
  • Moisture indicator

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

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

18: What is the refrigerant dichlorodifluoromethane?

  • R-134A
  • R-12
  • R-123
  • R-22

19: Ammonia is under what safety classification?

  • B2
  • A3
  • B3
  • B1

20: Who authorizes changes to the safety codes?

  • Person in charge of the facility
  • Person who pulled the permit
  • Board of Boilers
  • Contractor who last serviced the system.

21: All electrical work done on refrigeration systems must comply with

  • NEC and Massachusetts Modifications
  • ASHREA-15 Section 9.2.1
  • Department of Energy
  • OSHA

22: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall not be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited

23: 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

24: R-22 falls under which safety classification?

  • B-2
  • A-2
  • A-1
  • B-1

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

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