ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What type of relief valve is used on a CO2 system?

  • glove disc
  • gate valve
  • rupture disc
  • fusible plug

2: R-11 belongs to Group

  • A-1
  • A-2
  • B-3
  • B-1

3: Ammonia (NH3) is a group III refrigerant

  • True
  • False

4: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

6: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the aggregate of the high side and low side
  • the high side
  • the low side
  • 2.5 times the design pressure

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

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

8: A professional or office building would be considered what type of occupancy?

  • mercantile
  • commercial
  • business
  • public assembly

9: Fusible plugs shall not be used with pressure vessels of

  • 3 cubic feet or less
  • 15 square feet or less
  • 3 cubic feet or more
  • 15 cubic feet or more

10: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

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

  • 1.2
  • 1
  • 1.5
  • 2.2

12: 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
  • A field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressuers
  • the form or certificate shall be authorized by the Department of Public Safety

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

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

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

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

15: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • Yes, Under certain condidtions
  • Yes, always
  • No, never

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

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

17: What is a Category "M" fluid?

  • A typical refrigerant used on newer air conditioning and heat pump systems
  • 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 toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content

18: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 75
  • 15
  • 50
  • 55

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

  • annually
  • quarterly
  • bi-annually
  • regularly

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

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

21: 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

  • evaporator
  • compressor
  • boiler
  • outside the machinery room

22: R-22 is considered a(n)

  • HCFCH
  • HFC
  • CFC
  • HCFC

23: When an inspection is needed, how often must it be done?

  • annually
  • every 36 months
  • every 18 months
  • every 24 months

24: Refrigerant restricted in 2004 but used for transition for decades:

  • R-123
  • R-11
  • R-134A
  • R-22

25: What is an example of institutional occupancy?

  • Football stadium
  • Shopping mall
  • Dorms
  • Hospital