Topics: ASHRAE/CMR
1: Ammonia belongs to Group
- A-2
- B-2
- B-1
- A-1
2: What refrigerant is an inorganic compound?
- R-22
- R-410A
- R-132A
- Ammonia
3: Ammonia (NH3) is a group III refrigerant
- True
- False
4: 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
5: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
6: A relief valve shall be located at least ___ above grade.
- 25'
- 10'
- 36'
- 15'
7: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
8: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- ammonia
- HCFC-123
- Lithium bromide
- CFC-11
9: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-2
- B-2
- A-1
10: 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
- commercial occupancy
- illegal occupancy
- institutional occupancy
11: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 80%
- 99%
- 75%
12: 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”
- “UV”
- “U” or “UM”
- “UM” and “UV”
13: 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
14: A professional or office building would be considered what type of occupancy?
- business
- mercantile
- commercial
- public assembly
15: How many gallons of water do you need per pound of ammonia?
- 1
- 50
- 10
- 100
16: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or more
17: B3 refrigerants are considered
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
- non-toxic but non-flammable
18: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Anyone, it's a completely safe area
- Contractors only
19: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Flammability and temperature range
- Temperature range and hazardousness
- Flammability and toxicity
20: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
21: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 square feet or less
- 3 cubic feet or more
- 15 cubic feet or more
22: What must be done to refrigerant pipes before being buried?
- Certified
- Coated
- Leaked checked
- Encased
23: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- You can't change lubricants.
- Nothing must be done
- Make sure it's compatible, notify owner, notify AHJ
24: How many CFMs are required per square foot of commercial office occupied space
- 20 CFM
- 5 CFM
- 15 CFM
- .5 CFM
25: 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