ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited
  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited

2: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • regularly
  • annually
  • quarterly
  • bi-annually

3: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 8'4"
  • 7.25'
  • 7.00'
  • 9.00'

4: R-717 is

  • ammonia
  • carbon dioxide
  • trichloromethane
  • water

5: Refrigerants shall be classified by

  • maximum permissible quantities of each group
  • color codes
  • requirements for commercial, industrial, and residential occupancies
  • toxicity and flammability

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

  • 1000F
  • 700F
  • 800F
  • 600F

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

  • place sign, check for leaks, insulate
  • nothing must be done
  • make sure it's compatible, notify owner, notify A.H.J
  • you can't change refrigerants

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

  • relief valve
  • bleed valve
  • service valve
  • condenser

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

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

11: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system in excess of 1,000 lbs
  • 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

12: B3 refrigerants are considered

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

13: What refrigerant is an inorganic compound?

  • R-22
  • Ammonia
  • R-132A
  • R-410A

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

  • 25
  • III
  • 10
  • 15

15: 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

16: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • HCFC-123
  • CFC-11
  • Lithium bromide
  • ammonia

17: Which refrigerant class listed below is the most flammable?

  • A2
  • C3
  • A3
  • B2

18: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • insulated
  • moisture barrier
  • leak checked

19: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with R-718
  • Flush with RX-11
  • Flush with ammonia

20: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-718
  • R-717
  • R-711

21: 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

22: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall be installed in Class T machinery rooms
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ

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

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

24: A relief valve shall be located at least ___ above grade.

  • 10'
  • 25'
  • 36'
  • 15'

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

  • R-22
  • R-12
  • R-113
  • R-11