Topics: ASHRAE/CMR
1: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- At least 20'
- There is no minimum for relief valve and windows.
- At least 30'
2: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
3: 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
4: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-113
- R-12
5: 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, 3.0
- 3.0, 3.5
- 2.5, 2.5
- 6.6, 6.6
6: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade
- At least 20' above grade
7: 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
8: What is not a requirement of a Class T machine room?
- Tight fitting doors
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Automatic ventilation
9: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Magnesium alloy
- Copper
- Stainless Steel
10: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 25'
- 15'
- 30'
11: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Stop valve
- Muffler
- Moisture indicator
12: 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.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
13: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
14: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
15: 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
16: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
17: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
18: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Classifed
20: 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
21: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 3 cubic feet or less
- 15 cubic feet or more
- 15 square feet or less
22: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
23: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
24: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
25: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs