Topics: ASHRAE/CMR
1: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- low pressure
- critical pressure
- design pressure
2: What would be the classification of a church?
- Place of assembly
- Institutional
- Industrial
- Large mercantile
3: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
4: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
5: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
6: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
- over pressure protection as well as a temperature protection device
7: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
8: A relief valve shall be located at least ___ above grade.
- 10'
- 36'
- 15'
- 25'
9: 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
10: Most CFC's are
- inert
- flammable
- toxic
- inert but toxic
11: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- A group sensing
- phosgene gas sening
- refrigerant sensing
12: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
13: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
14: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Copper
- Magnesium alloy
- Aluminum
15: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
16: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
17: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Circuit Breaker
- Temperature limiter device
- T&P device
18: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 5
- 3
19: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
20: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Pressurized
- Leak tested
- Inspected
21: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-12
- R-123
- R-134A
22: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- insulated
- installed through a pipe casing
- moisture barrier
23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- rupture plug
- fusion plug
- relief plug
24: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-2
- A-2
- B-1
25: The color code of a tank of ammonia is
- lavender
- light green
- silver
- white