Topics: ASHRAE/CMR
1: When a refrigeration or air conditioning system is installed
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
2: R-22 is considered a(n)
- HCFCH
- HCFC
- HFC
- CFC
3: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 5/16"
- 3/32"
- 1/16"
4: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- quarterly
- bi-annually
- annually
5: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 2.5, 2.5
- 6.6, 6.6
- 3.0, 3.5
- 2.5, 3.0
6: NH3 is
- R-718
- R-508A
- ammonia
- lithium bromide
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: Who approves containers for refrigerants?
- D.O.T
- E.P.A
- D.O.E
- D.O.D
9: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 3
- 5
10: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
- OSHA approved
11: Pipe identification labels are required when the system contains more than
- 110 lbs
- 65 lbs
- 55 lbs
- 120 lbs
12: The color code of a tank of ammonia is
- light green
- silver
- white
- lavender
13: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 7.25'
- 72"
- 6'
14: What is the refrigerant chlorodifluoromethane?
- R-123
- R-134a
- R-22
- R-12
15: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
16: How many flammability classifications are refrigerants in?
- 5
- 2
- 7
- 3
17: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-2
- A-1
- B-1
- B-2
18: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
19: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 30'
- At least 20'
- There is no minimum for relief valve and windows.
- At least 40'
20: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
21: Halogenated refrigerants cannot be used with what material?
- Copper
- Aluminum
- Stainless steel
- Magnesium alloy
22: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
23: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- 2.5 times the design pressure
- the high side
- the low side
- the aggregate of the high side and low side
24: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
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
- 5.5
- 3.0
- 2.0