Topics: ASHRAE/CMR
1: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-22
- R-12
- R-134A
2: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- B-1
- A-2
- A-1
3: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11
4: Which occupancy can ammonia be used in?
- industrial
- depends on the quantity of freon
- commercial
- redifential
5: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- no flames shall be permitted
- the owner shall be informed
- explosion precautions must be taken
6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's a non-flammable refrigerant
- Because it's cheap
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's water
7: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
8: 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
9: A declaration test is needed when the system contains more than
- 120 lbs
- 55 lbs
- 110 lbs
- 65 lbs
10: Ammonia belongs to Group
- B-2
- A-2
- A-1
- B-1
11: What type of copper is not permitted on refrigeration systems?
- Type M
- Type N
- Type L
- Type K
12: What does safe access mean?
- Locked doors
- A clear unobstructed path to the equipment and controls
- OSHA approved
- Well-lit exit signs
13: 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
14: A professional or office building would be considered what type of occupancy?
- commercial
- business
- public assembly
- mercantile
15: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
16: 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
17: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-22
- R-123
- R-11
18: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
19: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
20: What is a Category "D" fluid?
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
21: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
22: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- compressor
- evaporator
- boiler
- outside the machinery room
23: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “UM” and “UV”
- “U” or “UM”
- “UV”
24: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 36"
- 18"
- 12"
25: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above