Topics: ASHRAE/CMR
1: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 15
- 24
- 18
2: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
3: 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
- 75
- 55
- 50
4: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but flammable
5: 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
6: 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
7: 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.
- 7.00'
- 9.00'
- 7.25'
- 8'4"
8: Which refrigerant class listed below is the most flammable?
- A-3
- C-3
- B-2
- A-1
9: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
10: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
11: Who authorizes changes to the safety codes?
- Board of Boilers
- Person in charge of the facility
- Person who pulled the permit
- Contractor who last serviced the system.
12: 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)
- institutional occupancy
- illegal occupancy
- public assembly occupancy
- commercial occupancy
13: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Rupture disk
- Fusible plug
- Glove valve
14: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- high limit control
- zone valve
15: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 7.25'
- 72"
- Ceiling height
16: 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
- CFC-11
- Lithium bromide
17: A High-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
18: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-22
- R-134A
- R-12
19: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
20: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
- No, never
21: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
22: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's cheap
- Because it's water
23: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
24: 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
25: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above