Topics: ASHRAE/CMR
1: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 15'
- 36'
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 550 lbs
- 330 lbs.
3: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- low limit control
- pressure relief device
- zone valve
4: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
5: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- Halon
- HFC
6: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
7: What is an egress?
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- An escape route
- A code violation
8: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 100,000
- 1,000
- 100
9: Which refrigerant class listed below is the most flammable?
- B2
- A3
- A2
- C3
10: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
11: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- Ceiling height
- 6'
- 7.25'
12: What is a Category "D" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- Any fluid that exceeds 150 psig and has design temperature of over 366F
13: 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.
- 7.25'
- 9.00'
- 8'4"
- 7.00'
14: What is not a requirement of a Class T machine room?
- Self-closing doors
- Tight fitting doors
- Automatic ventilation
- Fire hose connected to the building fire protection system.
15: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Aluminum
- Zinc
16: 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
17: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Flanged and gasketed
- Insulated and cross broke
- Welded and seamed.
18: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 1,000
- 6.6
- 110
19: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Any employee
- Authorized persons only
20: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- Because it's water
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
21: 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
22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
- the return air ducted system
23: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Inspected
- Pressurized
- Insulated
24: What would be the classification of a church?
- Industrial
- Place of assembly
- Large mercantile
- Institutional
25: A hotel is considered a _______ occupancy.
- institutional
- commercial
- residential
- mercantile