Topics: ASHRAE/CMR
1: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
2: A positive displacement compressor is
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
3: What type of copper is not permitted on refrigeration systems?
- Type L
- Type N
- Type K
- Type M
4: What is a Category "M" fluid?
- 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 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
5: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
6: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 50
- 22
- 66
7: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
8: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 14 days
- 30 days
- 1 week
9: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 75
- 15
- 20
- 50
10: Who is permitted to access a refrigeration machine room?
- Anyone, it's a completely safe area
- Any employee
- Contractors only
- Authorized persons only
11: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1.2
- 1
- 1.5
12: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
13: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Zinc
- Copper
14: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Copper
- Zinc
- Magnesium
15: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 50
- 550
- 350
16: Large mercantile occupancy is
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
17: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
- Flammability and temperature range
18: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UV or UR
- UL and UR
- UL and UM
- UM or UL
19: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- there is no Group B1 refrigerants
- lower
- higher
20: A professional or office building would be considered what type of occupancy?
- commercial
- mercantile
- business
- public assembly
21: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
22: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
23: 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)
- illegal occupancy
- public assembly occupancy
- institutional occupancy
- commercial occupancy
24: 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
- outside the machinery room
- compressor
- boiler
- evaporator
25: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b