Topics: ASHRAE/CMR
1: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Welded and seamed.
- Ducted and sealed
2: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- insulated
- moisture barrier
- installed through a pipe casing
3: The Board of Boilers adopts by reference
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- MSCA Code
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: Relief valves are rated in
- pounds of air per hour
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
6: 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.
- 8'4"
- 7.00'
- 7.25'
- 9.00'
7: Class 3 refrigerants are
- toxic
- non-toxic
- highly flammable
- non-flammable
8: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
9: Which refrigerant replaced R-12?
- R-22
- R-407A
- R-134A
- R-410A
10: 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.
- 75
- 55
- 50
- 15
11: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
12: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
13: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- Circuit Breaker
- Relief valve
- T&P device
14: A movie theater would be considered a
- institutional occupancy
- mixed occupancy
- commercial occupancy
- public assembly occupancy
15: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
16: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-502
- R-113
- R-11
17: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 25'
- 20'
- 30'
18: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 18
- 36
- 24
19: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 80%
- 100%
- 75%
20: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 20'
- At least 40'
- At least 30'
21: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UL and UR
- UM or UL
- UV or UR
22: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Copper
- Zinc
- Nickel
23: High pressure controls should be set no higher than
- 80% of set point
- 10% of set point
- 25% of set point
- 90% of set point
24: How many groups of refrigerants are there?
- 5
- 7
- 3
- 1
25: A High-Probablity system
- is a system highly likely to leak from 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 failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space