Topics: ASHRAE/CMR
1: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
2: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
3: Can ammonia be used on domestic system?
- yes
- no
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
4: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 25
- 66
5: 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 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
- 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.
6: What pipe can not be used for refrigeration?
- M
- N
- K
- L
7: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
- shall be $20 and an additional fee of $1 for each tone above 20 tons
8: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Copper tubing
- Brass
9: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusion plug
- rupture plug
- relief plug
- fusible plug
10: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
11: How many flammability classifications are refrigerants in?
- 2
- 3
- 7
- 5
12: High pressure controls should be set no higher than
- 80% of set point
- 10% of set point
- 90% of set point
- 25% of set point
13: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
14: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
15: A professional or office building would be considered what type of occupancy?
- business
- mercantile
- commercial
- public assembly
16: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Approved by the installing contractor
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
17: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
18: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
19: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
20: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- mixed occupancy
- public assembly occupancy
- commercial occupancy
- institutional occupancy
21: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-22
- R-12
- R-134A
22: What would be the classification of a church?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
23: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed welder
- competent welder
- licensed technician
24: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
25: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
- the mechanical room housing the refrigeration system