ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

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

• Stainless steel
• Magnesium alloy
• PVC
• Copper

2: A hotel is considered a _______ occupancy.

• mercantile
• commercial
• residential
• institutional

3: All machine rooms must be outfitted with a detector that _______?

• activates an audible alarm
• activates a visual alarm
• starts the ventilation system
• All of the above

4: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

• Because it's a non-flammable refrigerant
• R-718 is not rated unlimited because it's a dangerous refrigerant
• Because it's water
• Because it's cheap

5: 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

6: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

• 100,000
• 10,000
• 100
• 1,000

7: Where are the three places that the discharge from an ammonia relief valve be piped?

• atmosphere, tank containing water, where the A.H.J. indicates
• underground, into drain, into mechanical room
• to chemical neutralizing tank only
• none of the above

8: 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
• business occupancy
• commercial occupancy
• public assembly occupancy.

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

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

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

• III
• 10
• 15
• 25

11: Class A refrigerants are considered

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

12: How many different groups of refrigerants are there?

• 11
• 15
• 3
• 7

13: Ammonia is under what safety classification?

• A3
• B3
• B2
• B1

14: What is the refrigerant chlorodifluoromethane?

• R-12
• R-123
• R-134a
• R-22

15: R-12. R-22, and R-40 are considered Group I refrigerants.

• True
• False

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

• relief valve
• condenser
• bleed valve
• service valve

17: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

• institutional occupancy
• commercial occupancy
• public assembly occupancy
• illegal occupancy

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

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

19: What would be the classification of a prison?

• Institutional
• Industrial
• Place of assembly
• Large mercantile

20: R-717 is

• water
• carbon dioxide
• trichloromethane
• ammonia

21: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

• Pressure gauge
• Temperature gauge
• Sight glass gauge
• All of the above

22: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

• True
• False

23: 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

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

• 75%
• 99%
• 90%
• 80%

25: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

• the atmosphere
• a de-pressurized recovery tank with a silver top and yellow bottom
• a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
• All of the above