ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: An example of direct system is

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

2: 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

3: What is R-22?

  • Chlorofluoromethane
  • HFC
  • CCFCM
  • Chlorodifluoromethane

4: Who approves containers for refrigerants?

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

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

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

6: Ammonia is under what safety classification?

  • B2
  • A3
  • B1
  • B3

7: The color code of a tank of ammonia is

  • silver
  • white
  • light green
  • lavender

8: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • it shall not be operated below prescribed pressures
  • the form of certificate shall be authorized by the Department of Pubic safety

9: 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

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

10: High pressure controls should be set no higher than

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

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

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

12: 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

13: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

14: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

15: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system less than 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used for mechanical equipment only
  • shall be used in refrigeration system in excess of 1,000 lbs

16: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

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

  • 15
  • 25
  • 10
  • III

18: What would be the classification for Stop & Shop grocery store?

  • Place of assembly
  • Large mercantile
  • Industrial
  • Instituional

19: 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

20: What type of relief valve is used on a CO2 system?

  • fusible plug
  • rupture disc
  • glove disc
  • gate valve

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

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

22: 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.

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

23: Class T machine room

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

24: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

25: How are refrigerant blends classified?

  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Based on the oil used