Topics: ASHRAE/CMR
1: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UM” and “UV”
- “UV”
- “UL”
- “U” or “UM”
2: Which refrigerant class listed below is the most flammable?
- A-3
- B-2
- A-1
- C-3
3: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 1
- 15
4: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- boiler
- outside the machinery room
- compressor
- evaporator
5: 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
6: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
- the mechanical room housing the refrigeration system
7: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
- you can't change refrigerants
- nothing must be done
8: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- 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
9: When an inspection is needed, how often must it be done?
- annually
- every 24 months
- every 36 months
- every 18 months
10: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- annually
- bi-annually
- quarterly
11: Name three things that must be done when changing refrigeration lubricant?
- Nothing must be done
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Place sign, check for leaks, insulate
12: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Pressurized
- Leak tested
- Insulated
13: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- insulated
- leak checked
- moisture barrier
14: R-123 belongs to Group
- B-1
- A-3
- B-2
- B-3
15: R-717 is
- water
- trichloromethane
- carbon dioxide
- ammonia
16: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 20
- 50
- 75
- 15
17: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
18: 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
19: How many gallons of water do you need per pound of ammonia?
- 10
- 100
- 50
- 1
20: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
21: What would be the classification of a prison?
- Large mercantile
- Institutional
- Place of assembly
- Industrial
22: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Copper
- Nickel
- Zinc
23: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or more
24: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-11
- R-134A
- R-123
25: 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