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

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

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

  • stainless steel
  • copper
  • magnesium
  • black iron

4: 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
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited
  • shall be prohibited

5: When should a relief valve start to function?

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

6: What type of pressure relief device is used on a CO2 system?

  • Rupture disk
  • Gate valve
  • Glove valve
  • Fusible plug

7: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

8: Class T machine room

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

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

  • commercial
  • business
  • mercantile
  • public assembly

10: What does safe access mean?

  • OSHA approved
  • Locked doors
  • Well-lit exit signs
  • A clear unobstructed path to the equipment and controls

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

  • 55 lbs
  • 660 lbs
  • 330 lbs.
  • 550 lbs

12: Ammonia belongs to Group

  • B-1
  • A-2
  • B-2
  • A-1

13: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

14: A class B1 refrigerant is considered

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

15: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

16: A restaurant is classified as a

  • commercial occupancy
  • public assembly occupancy
  • large mercantile occupancy
  • mixed occupancy

17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 600F
  • 700F
  • 800F
  • 1000F

18: 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

19: High pressure controls should be set no higher than

  • 90% of set point
  • 25% of set point
  • 10% of set point
  • 80% of set point

20: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

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

  • R-11
  • R-22
  • R-12
  • R-113

22: The color code of a tank of ammonia is

  • lavender
  • light green
  • silver
  • white

23: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • there is no Group B1 refrigerants
  • higher
  • lower
  • the same

24: What refrigerant doesn't have to be classified?

  • R-718
  • R-422A
  • R-134A
  • R-717

25: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Authorized persons only
  • Any employee
  • Anyone, it's a completely safe area