Topics: ASHRAE/CMR
1: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 330 lbs.
- 550 lbs
2: 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
3: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with ammonia
- Flush with RX-11
- Flush with R-11
- Flush with R-718
4: What does “ultimate strength” mean?
- Design strength of the vessel or piping in a refrigeration system
- Stress at which rupture will occur
- Highest or design pressure allowed inside a machinery room
- None of the above
5: Most CFC's are
- flammable
- inert but toxic
- toxic
- inert
6: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
7: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- service manuals
- safe access
8: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- bleed valve
- condenser
9: What refrigerant is an inorganic compound?
- R-132A
- Ammonia
- R-410A
- R-22
10: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
11: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
12: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Aluminum
- Copper
13: 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
14: 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.
- 7.25'
- 7.00'
- 8'4"
- 9.00'
15: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- public assembly
- commercial
16: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
17: What is the intention of the word “should” as used in the code?
- A mandatory requirement
- A recommendation or advisory guideline
- A technician’s choice of how it should be done
- None of the Above
18: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
19: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on best case Fractionation
- Based on the oil used
- Blends don't have to be classified
20: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
21: Which refrigerant replaced R-12?
- R-410A
- R-407A
- R-134A
- R-22
22: How many refrigerant classifications are there for flammability?
- 1
- 7
- 2
- 3
23: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- B-2
- A-2
- A-1
24: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-113
- R-11
25: What is a Category "M" fluid?
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A typical refrigerant used on newer air conditioning and heat pump systems
- 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