Topics: ASHRAE/CMR
1: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
2: Can ammonia be used on domestic system?
- yes
- no
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
3: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Fusible plug
- Rupture disk
4: A movie theater would be considered a
- commercial occupancy
- public assembly occupancy
- mixed occupancy
- institutional occupancy
5: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
6: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
7: Pipe identification labels are required when the system contains more than
- 110 lbs
- 120 lbs
- 55 lbs
- 65 lbs
8: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
9: Industrial occupancy is
- a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
- is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- Both a and b are correct
10: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 66
- 22
- 25
11: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-22
- R-12
- R-134A
12: Class A refrigerants are considered
- non-toxic
- toxic
- flammable
- non-flammable
13: How are refrigerant blends classified?
- Based on the oil used
- Based on best case Fractionation
- Blends don't have to be classified
- Based on worst case fractionation
14: Large mercantile occupancy is
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
15: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Aluminum
- Copper
16: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- annually
- every 18 months
17: 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
18: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
- Approved by the authorized person
19: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
20: What refrigerant doesn't have to be classified?
- R-422A
- R-717
- R-718
- R-134A
21: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
22: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
23: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
24: 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
- 400
- 250
- 100
25: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 3.0
- 2.0
- 5.5