Topics: ASHRAE/CMR
1: What do you need to do when you install a new system?
- Have it inspected
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Document the superheat and subcooling reading
2: A restaurant is classified as a
- large mercantile occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
3: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- copper
- magnesium
- black iron
4: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Stop valve
- Muffler
- Foot valve
5: What is R-22?
- CCFCM
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
6: Ammonia is under what safety classification?
- B2
- B3
- A3
- B1
7: What is not a requirement of a Class T machine room?
- Self-closing doors
- Tight fitting doors
- Automatic ventilation
- Fire hose connected to the building fire protection system.
8: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- no flames shall be permitted
- gas masks must be worn
- explosion precautions must be taken
9: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
10: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 700F
- 1000F
11: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 110
- 100
- 80
- 90
12: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- 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 on the compressor shell or electrical panel at the unit
13: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
14: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 24
- 10
15: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-134A
- R-22
- R-123
16: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
17: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
18: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
19: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- public assembly occupancy
- commercial occupancy
- mixed occupancy
20: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 90%
- 80%
21: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 400
- 100
- 350
- 250
22: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 2
- 1
- 5
23: How many gallons of water per pound of ammonia do you need?
- 20
- 5
- 1
- 15
24: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms
25: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 110 lbs
- 120 lbs