ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A declaration test is needed when the system contains more than

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

2: 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

3: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

4: When air is ducted through a machine room that services occupied space, What must be done?

  • Ducted and sealed
  • Flanged and gasketed
  • Welded and seamed.
  • Insulated and cross broke

5: Who approves containers for refrigerants?

  • D.O.T
  • D.O.D
  • D.O.E
  • E.P.A

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

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

7: How many different groups of refrigerants are there?

  • 3
  • 15
  • 11
  • 7

8: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

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

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

10: Halogen refrigerants are corrosive to which type of metal?

  • copper
  • black iron
  • magnesium
  • stainless steel

11: 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
  • 55
  • 15
  • 50

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

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

13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 500 lbs
  • 660 lbs
  • 330 lbs

14: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 3.0
  • 2.5
  • 5.5
  • 2.0

15: How much refrigerant can be stored in a mechanical room outside of the system?

  • 150
  • 200
  • 330
  • 100

16: When should a relief valve start to function?

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

17: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Certified
  • Classifed
  • Insulated and installed in a pipe duct (Encased)
  • Leak checked

18: Class T machine room

  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall include closets used for setting equipment

19: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

20: All serviceable components of a refrigeration system shall be provided with

  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures
  • service manuals
  • safe access

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

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

22: What is an egress?

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

23: What is a Category "M" fluid?

  • 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
  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content

24: Which occupancy can ammonia be used in?

  • commercial
  • depends on the quantity of freon
  • redifential
  • industrial

25: Low temperature systems should have what?

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