Topics: ASHRAE/CMR
1: A positive displacement compressor is
- is a reciprocating type compressor with 2 or more pistons
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
2: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
3: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- leak checked
- moisture barrier
- insulated
4: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-123
- R-11
- R-134A
5: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-134A
- R-123
- R-12
6: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- bi-annually
- regularly
- quarterly
- annually
7: 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
8: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
9: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- high pressure
- low pressure
- critical pressure
10: R-123 belongs to Group
- B-1
- B-2
- A-3
- B-3
11: Machinery rooms must be vented to ______?
- neutralizing tank
- outdoors
- unoccupied spaces
- basement
12: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
13: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 25
- III
- 15
14: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually and when installed
- Not required
- Annually
15: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200
16: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.0
- 2.5
- 3.0
17: What is R-22?
- Chlorofluoromethane
- HFC
- Chlorodifluoromethane
- CCFCM
18: Who approves containers for refrigerants?
- E.P.A
- D.O.D
- D.O.E
- D.O.T
19: A relief valve discharge capacity is rated in
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- Pounds of air per minute.
20: Can ammonia be used on domestic system?
- no
- yes, for systems under 10 tons
- yes
- no, unless there is proper ventilation system installed
21: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 1000F
- 600F
22: How many refrigerant classifications are there for toxicity?
- 2
- 3
- 5
- 1
23: R-22 falls under which safety classification?
- B-2
- A-2
- B-1
- A-1
24: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50
25: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- institutional occupancy
- illegal occupancy
- commercial occupancy