Topics: ASHRAE/CMR
1: A declaration test is needed when the system contains more than
- 65 lbs
- 110 lbs
- 55 lbs
- 120 lbs
2: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
3: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
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
- evaporator
- compressor
5: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- HCFC-123
- Lithium bromide
- CFC-11
- ammonia
6: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D
7: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-113
- R-502
- R-11
8: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- nothing must be done
- make sure it's compatible, notify owner, notify A.H.J
9: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
10: What pipe can not be used for refrigeration?
- L
- M
- N
- K
11: How many refrigerant classifications are there for flammability?
- 3
- 7
- 1
- 2
12: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- rupture plug
- fusion plug
- fusible plug
13: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
14: Which refrigerant class listed below is the most flammable?
- B2
- A3
- C3
- A2
15: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
16: Liquid level gauges must be provided with what?
- A relief valve
- A red line
- A low level mark
- Automatic shut-offs
17: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Instituional
- Place of assembly
18: 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.
- “U” or “UM”
- “UL”
- “UM” and “UV”
- “UV”
19: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
20: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- B-2
- A-2
21: The color code of a tank of ammonia is
- white
- silver
- light green
- lavender
22: 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
23: Setting a pressure relief device shall not exceed ___ of the design pressure
- 100%
- 75%
- 80%
- 90%
24: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
25: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort