Topics: ASHRAE/CMR
1: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Fusible plug
- Gate valve
2: What refrigerant is an inorganic compound?
- R-132A
- R-22
- Ammonia
- R-410A
3: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- relief plug
- rupture plug
4: The color code of a tank of ammonia is
- lavender
- silver
- white
- light green
5: 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"
- 7.00'
- 7.25'
6: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Temperature limiter device
- Relief valve
- Circuit Breaker
7: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
8: 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
9: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
10: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Large mercantile
- Instituional
- Industrial
11: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
12: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/16"
- 1/8"
- 3/32"
13: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class T machinery room
- Class B machinery room
- Class M machinery room
14: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
15: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 6.6
- 330
- 1,000
16: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
17: What refrigerant doesn't have to be classified?
- R-422A
- R-718
- R-134A
- R-717
18: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
- 15 cubic feet or more
19: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 1
- 5
- 3
20: 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
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
22: A hotel is considered a _______ occupancy.
- mercantile
- residential
- institutional
- commercial
23: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Zinc
- Nickel
- Copper
24: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 5 CFM
- 20 CFM
25: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above