Topics: ASHRAE/CMR
1: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Aluminum
- Copper
2: What would be the classification of a church?
- Industrial
- Large mercantile
- Institutional
- Place of assembly
3: R-11 belongs to Group
- A-2
- B-1
- B-3
- A-1
4: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
5: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
6: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 66
- 22
- 25
7: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 660 lbs
- 55 lbs
- 550 lbs
8: How many refrigerant classifications are there for toxicity?
- 5
- 3
- 2
- 1
9: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
10: What would be the classification of a prison?
- Large mercantile
- Industrial
- Institutional
- Place of assembly
11: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.5
- 1.2
- 2.2
12: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
13: Which refrigerant class listed below is the most flammable?
- A2
- A3
- B2
- C3
14: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- OSHA
- Section 8 ASHREA 15 ASME unfired
15: Ammonia (NH3) is a group III refrigerant
- True
- False
16: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 1000F
- 600F
17: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- basement
- outdoors
18: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Place sign, check for leaks, insulate
- Nothing must be done
- Make sure it's compatible, notify owner, notify AHJ
19: What is an egress?
- An escape route
- A valve put on the low side of the system to prevent frosting
- A code violation
- An entrance or exit
20: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- Department of Energy
- OSHA
- NEC and Massachusetts Modifications
21: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- bi-annually
- regularly
- quarterly
22: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
23: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
24: R-22 falls under which safety classification?
- B-1
- A-1
- B-2
- A-2
25: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above