Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
- 65 lbs
- 120 lbs
- 55 lbs
- 110 lbs
2: A High-Probablity 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 unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
3: Class A refrigerants are considered
- toxic
- non-flammable
- non-toxic
- flammable
4: 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
5: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
6: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per hour
- pounds of air per minute
9: What refrigerant is an inorganic compound?
- Ammonia
- R-132A
- R-22
- R-410A
10: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1
- 1.2
- 1.5
11: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications
12: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 100%
- 90%
13: What type of copper is not permitted on refrigeration systems?
- Type K
- Type L
- Type N
- Type M
14: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 50
- 22
- 25
15: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Leak tested
- Pressurized
- Insulated
16: A relief valve discharge capacity is rated in
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- Pounds of air per minute.
17: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 50
- 350
- 550
- 100
18: Ammonia (NH3) is a group III refrigerant
- True
- False
19: What is not a requirement of a class T machine room?
- automatic ventilation
- self-closing doors
- tight fitting doors
- fire hose connection to the building fire protection system
20: What section governs pressure vessels?
- Section 8 ASHREA 15 ASME unfired
- OSHA
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
21: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
22: 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
23: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 350
- 250
- 400
- 100
24: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 3 cubic feet or less
- 15 square feet or less
- 15 cubic feet or more
25: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above