Topics: ASHRAE/CMR
1: What type of material can't be used on the outlet of a relief valve?
- PVC
- Magnesium alloy
- Stainless steel
- Copper
2: 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
3: 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
- institutional occupancy
- public assembly occupancy
- commercial occupancy
4: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
5: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 30 days
- 1 week
- 2 months
6: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 55
- 50
- 75
7: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
8: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-2
- A-1
- B-1
9: 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
10: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Copper
- Aluminum
11: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 3
- 1
- 5
12: What would be the classification of a church?
- Large mercantile
- Place of assembly
- Institutional
- Industrial
13: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
14: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
15: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
16: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
17: What is a Category "M" fluid?
- 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
- 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
18: 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.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
19: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
20: Who approves containers for refrigerants?
- E.P.A
- D.O.T
- D.O.D
- D.O.E
21: R-11 belongs to Group
- A-2
- B-3
- B-1
- A-1
22: Ammonia (NH3) is a group III refrigerant
- True
- False
23: How many gallons of water per pound of ammonia do you need?
- 1
- 20
- 15
- 5
24: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Zinc
- Nickel
- Magnesium
25: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 24
- 18
- 15