Topics: ASHRAE/CMR
1: How many different groups of refrigerants are there?
- 3
- 7
- 11
- 15
2: What must be done to refrigerant pipes before being buried?
- Encased
- Certified
- Leaked checked
- Coated
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 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
5: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Copper
- Zinc
6: Which refrigerant class listed below is the most flammable?
- C3
- A2
- B2
- A3
7: The color code of a tank of ammonia is
- lavender
- light green
- silver
- white
8: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
9: Large mercantile occupancy is
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
10: 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
11: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
12: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113
13: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 100%
- 90%
- 80%
14: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
15: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
16: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
17: The Board of Boilers adopts by reference
- MSCA Code
- the MACS Pressure Vessel Code of Massachusetts
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
18: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
19: How many refrigerant classifications are there for flammability?
- 3
- 1
- 7
- 2
20: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 20'
- At least 30'
- There is no minimum for relief valve and windows.
- At least 40'
21: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- HFC
- Halon
22: R-22 falls under which safety classification?
- A-1
- B-2
- A-2
- B-1
23: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
24: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
25: Ammonia can come in contact with _______ ?
- Aluminum
- Copper tubing
- Brass
- Copper