Topics: ASHRAE/CMR
1: Most CFC's are
- inert but toxic
- toxic
- inert
- flammable
2: 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.
- 250
- 100
- 350
- 400
3: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
4: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
5: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
6: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Rupture disk
- Glove valve
- Fusible plug
7: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and oil separator
- between the compressor and reciever
- between the compressor and the stop valve
8: Which occupancy can ammonia be used in?
- commercial
- industrial
- depends on the quantity of freon
- redifential
9: Can ammonia be used on domestic system?
- no
- yes
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons
10: How many gallons of water do you need per pound of ammonia?
- 10
- 1
- 50
- 100
11: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-718
- Flush with ammonia
- Flush with RX-11
- Flush with R-11
12: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
13: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Magnesium alloy
- Stainless Steel
- Copper
14: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class B machinery room
- Class A machinery room
- Class T machinery room
15: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- critical pressure
- high pressure
16: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-11
- R-113
17: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 75%
- 90%
- 100%
18: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
19: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
20: Halogenated refrigerants cannot be used with what material?
- Stainless steel
- Magnesium alloy
- Aluminum
- Copper
21: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices
22: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
23: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Muffler
- Moisture indicator
- Stop valve
24: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
25: How many refrigerant classifications are there for toxicity?
- 2
- 1
- 3
- 5