Topics: ASHRAE/CMR
1: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 square feet or less
- 15 cubic feet or more
- 3 cubic feet or more
2: A class A3 refrigerant is considered
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
3: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
4: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
5: What pipe can not be used for refrigeration?
- N
- L
- M
- K
6: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Magnesium
- Copper
- Zinc
7: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
8: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
9: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Any employee
- Authorized persons only
10: Stop valves shall not be permitted between the system and the
- bleed valve
- service valve
- condenser
- relief valve
11: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
12: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
13: A movie theater would be considered a
- institutional occupancy
- public assembly occupancy
- mixed occupancy
- commercial occupancy
14: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
15: Direct systems using Group II refrigerants
- 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
- shall be installed per instruction of the AHJ
16: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-134A
- R-407A
17: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
18: 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
19: Each machinery room shall contain
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
20: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
21: What refrigerant doesn't have to be classifted?
- R-134a
- R-718
- R-717
- R-711
22: 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
23: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
24: 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
- competent welder
- welder qualified
- licensed welder
- licensed technician
25: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above