ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

2: A class B2 refrigerant is considered

  • toxic and non-flammable
  • non-toxic and highly flammable
  • toxic and somewhat flammable
  • non-toxic and non-flammable

3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Place sign, check for leaks, and insulate suction line
  • Nothing must be done
  • you can never change refrigerants
  • Make sure its compatible, notify owner, and notify AHJ.

4: Class T machine room

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

5: No open flames are allowed in the machinery room unless?

  • Approved by the installing contractor
  • Approved by the authorized person
  • Only when combustion air is provided from outside of the machinery room
  • Never can be allowed

6: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

7: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 36
  • 18
  • 24

8: Who authorizes changes to the safety codes?

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

9: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

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

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

11: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • public assembly occupancy.
  • commercial occupancy
  • business occupancy

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

  • 15
  • 25
  • 10
  • III

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

  • Copper
  • PVC
  • Stainless Steel
  • Aluminum

14: Ammonia (NH3) is a group III refrigerant

  • True
  • False

15: What is R-22?

  • HFC
  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane

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

  • 2
  • 1
  • 3
  • 5

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

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

18: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 13.9 lbs
  • 6.6 lbs
  • 44 lbs

19: What would be the classification of a prison?

  • Large mercantile
  • Industrial
  • Place of assembly
  • Institutional

20: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

21: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space

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

  • A-1
  • A-2
  • B-1
  • B-2

23: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

24: What is the refrigerant dichlorodifluoromethane?

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

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

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