Topics: ASHRAE/CMR
1: What is R-290’s ASHRAE safety code?
- B1
- A3
- A2
- B2
2: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 90%
- 100%
- 75%
- 80%
3: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- 2.5 times the design pressure
- the high side
- the aggregate of the high side and low side
- the low side
4: What refrigerant is an inorganic compound?
- R-132A
- R-22
- R-410A
- Ammonia
5: All serviceable components of a refrigeration system shall be provided with
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- safe access
6: 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
7: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
8: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the outdoors
- the mechanical room housing the refrigeration system
- the return air ducted system
9: 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
10: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Stop valve
- Moisture indicator
- Foot valve
11: NH3 is
- ammonia
- R-508A
- R-718
- lithium bromide
12: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
13: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
14: Ammonia is under what safety classification?
- B3
- B1
- B2
- A3
15: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Stainless steel
- Copper
- Magnesium alloy
16: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 24 months
- every 18 months
17: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 1 week
- 14 days
18: Most CFC's are
- flammable
- inert but toxic
- toxic
- inert
19: What must be done to refrigerant pipes before being buried?
- Leaked checked
- Coated
- Certified
- Encased
20: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
21: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
22: A hotel is considered a _______ occupancy.
- mercantile
- institutional
- residential
- commercial
23: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- mixed occupancy
- institutional occupancy
- public assembly occupancy
24: A declaration test is needed when the system contains more than
- 120 lbs
- 110 lbs
- 65 lbs
- 55 lbs
25: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- there is no Group B1 refrigerants
- lower
- the same