Topics: ASHRAE/CMR
1: A professional or office building would be considered what type of occupancy?
- commercial
- public assembly
- mercantile
- business
2: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless Steel
- Magnesium alloy
3: What is the refrigerant chlorodifluoromethane?
- R-12
- R-123
- R-134a
- R-22
4: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
5: NH3 is
- R-718
- R-508A
- ammonia
- lithium bromide
6: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- Nothing must be done
- Place sign, check for leaks, insulate
- You can't change lubricants.
7: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
8: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 15
- 25
- 10
- 20
9: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- no flames shall be permitted
- gas masks must be worn
- explosion precautions must be taken
- the owner shall be informed
10: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 44 lbs
- 22 lbs
- 6.6 lbs
11: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- PSIA
- Pounds of air per minute.
12: Which occupancy can ammonia be used in?
- redifential
- depends on the quantity of freon
- industrial
- commercial
13: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
14: 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
15: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 6.6
- 1,000
- 330
16: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1.2
- 1
- 1.5
17: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- mercantile occupancy
- commercial occupancy
- business occupancy
18: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- high side of the system
- the liquid side of the system
- the vapor side of the system
19: When should a relief valve start to function?
- At it's set pressure
- Two times it's working pressure
- Before the purge station discharges
- 10 psi before it's set pressure
20: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and oil separator
- between the compressor and the stop valve
- between the compressor and reciever
21: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
22: 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.
- 50
- 55
- 75
- 15
23: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
24: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Leak tested
- Insulated
- Pressurized
25: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors