ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 25
  • III
  • 15
  • 10

2: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection as well as a temperature protection device
  • over pressure protection
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection and a rupture disc

3: What type refrigerant is NOT ozone depleting?

  • HFC
  • CFC
  • Halon
  • HCFC

4: 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

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

  • 100
  • 50
  • 1
  • 10

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

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

7: Single compound Refrigerants are classified by what two criteria?

  • Temperature range and hazardousness
  • Weight and color
  • Flammability and temperature range
  • Flammability and toxicity

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

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

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

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

10: What section governs pressure vessels?

  • OSHA
  • Section ASHREA 34
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired

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

  • 1
  • 1.2
  • 2.2
  • 1.5

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

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

13: Fusible plugs must have what marked on them?

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

14: What pipe can not be used for refrigeration?

  • M
  • N
  • K
  • L

15: Can you use Ammonia in industrial applications?

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

16: A positive displacement compressor is

  • 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
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber

17: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 3
  • 5
  • 1
  • 2

18: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

  • R-22
  • R-113
  • R-11
  • R-12

20: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 6.6, 6.6
  • 2.5, 3.0
  • 2.5, 2.5
  • 3.0, 3.5

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

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

22: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

23: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

24: What is the minimum height refrigeration piping should be placed against walls?

  • 72"
  • 6'
  • 7.25'
  • Ceiling height

25: What is an egress?

  • An escape route
  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • A code violation