Topics: ASHRAE/CMR
1: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Moisture indicator
- Foot valve
- Muffler
2: Ammonia (NH3) is a group III refrigerant
- True
- False
3: 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
- the owner shall be informed
- explosion precautions must be taken
4: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
5: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- leak checked
- insulated
- moisture barrier
6: How many refrigerant classifications are there for flammability?
- 1
- 3
- 7
- 2
7: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- illegal occupancy
- commercial occupancy
- institutional occupancy
8: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be $20 and an additional fee of $1 for each tone above 20 tons
9: 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
10: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 1000F
- 700F
11: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
12: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
13: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
14: 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
15: R-717 is
- water
- trichloromethane
- carbon dioxide
- ammonia
16: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
17: Most CFC's are
- toxic
- inert but toxic
- flammable
- inert
18: What is an example of institutional occupancy?
- Football stadium
- Dorms
- Hospital
- Shopping mall
19: Class A refrigerants are considered
- non-toxic
- flammable
- non-flammable
- toxic
20: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
21: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- low pressure
- critical pressure
- high pressure
22: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
23: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class M machinery room
- Class A machinery room
- Class T machinery room
24: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
25: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Glove valve
- Rupture disk