ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 99%
  • 80%
  • 75%
  • 90%

2: What must be done to refrigerant pipes before being buried?

  • Coated
  • Leaked checked
  • Certified
  • Encased

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 is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

5: What is the refrigerant dichlorodifluoromethane?

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

6: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

7: The color code of a tank of ammonia is

  • white
  • lavender
  • silver
  • light green

8: Class 3 refrigerants are

  • highly flammable
  • non-toxic
  • non-flammable
  • toxic

9: The Department that certifies the transportation of refrigerant is the

  • RSES
  • EPO
  • DOT
  • EPA

10: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 75
  • 50
  • 15
  • 20

11: Who approves containers for refrigerants?

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

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

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

13: How many different groups of refrigerants are there?

  • 7
  • 15
  • 3
  • 11

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

  • Instituional
  • Place of assembly
  • Large mercantile
  • Industrial

15: 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

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

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

17: High pressure controls should be set no higher than

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

18: When a refrigeration or air conditioning system is installed

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

19: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements

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

  • 5
  • 1
  • 3
  • 2

21: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

22: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusion plug
  • relief plug
  • rupture plug
  • fusible plug

23: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a fusible plug
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • either a fusible plug or a pressure relief device
  • a pressure relief device

24: When an inspection is needed, how often must it be done?

  • every 18 months
  • annually
  • every 24 months
  • every 36 months

25: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above