ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Copper
  • Nickel
  • Magnesium
  • Zinc

2: How far from the ground does a relief valve need to be?

  • Not more than 3' above grade
  • At least 20' above grade
  • At least 25' above grade
  • At least 15' above grade

3: NH3 is

  • R-718
  • ammonia
  • R-508A
  • lithium bromide

4: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

5: 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

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

  • 3
  • 1
  • 2
  • 5

7: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 120 lbs
  • 110 lbs
  • 65 lbs

8: The discharge relief valve is located (9.4.6)

  • between the compressor and reciever
  • on top of the condensor
  • between the compressor and oil separator
  • between the compressor and the stop valve

9: 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

10: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

11: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When its white
  • When it's used as part of a supply or return air system
  • When there are sprinklers above
  • When there is a space 6' or more above it

12: The certificate of inspection

  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be authorized by a notarized insurance company
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted and protected from dirt, water, and other elements

13: R-22 is considered a(n)

  • HFC
  • HCFC
  • HCFCH
  • CFC

14: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

15: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • welder qualified
  • licensed technician
  • licensed welder
  • competent welder

16: Halo-carbon refrigerants cannot be used with what material?

  • Copper
  • Stainless Steel
  • Magnesium alloy
  • Aluminum

17: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 1,000
  • 6.6
  • 110
  • 330

18: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • A-2
  • B-1
  • A-1

19: What kind of material can't be used on the outlet of a relief valve?

  • Stainless Steel
  • Aluminum
  • Copper
  • PVC

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

  • 22
  • 50
  • 33
  • 18

21: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusible plug
  • relief plug
  • fusion plug
  • rupture plug

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

  • 15
  • 5
  • 20
  • 1

23: 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

24: Stop valves shall not be permitted between the system and the

  • service valve
  • bleed valve
  • relief valve
  • condenser

25: Who authorizes changes to the safety codes?

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