Topics: ASHRAE/CMR
1: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
2: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall be installed per instruction of the AHJ
3: How many different groups of refrigerants are there?
- 11
- 7
- 15
- 3
4: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
5: What type of copper is not permitted on refrigeration systems?
- Type K
- Type M
- Type L
- Type N
6: Class 3 refrigerants are
- non-flammable
- highly flammable
- toxic
- non-toxic
7: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- competent welder
- licensed technician
- welder qualified
- licensed welder
8: 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
- 2.5, 3.0
- 6.6, 6.6
- 3.0, 3.5
9: 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
10: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 550
- 50
- 350
11: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- 20 CFM
- 15 CFM
- .5 CFM
12: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 44 lbs
- 13.9 lbs
- 6.6 lbs
13: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 25
- 66
- 50
14: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 30'
- At least 20'
15: How many groups of refrigerants are there?
- 5
- 3
- 1
- 7
16: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
17: What refrigerant were phased out in 2004?
- R-11
- R-22
- R-134a
- R-12
18: What type refrigerant is NOT ozone depleting?
- HFC
- CFC
- Halon
- HCFC
19: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
20: 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
21: Which refrigerant class listed below is the most flammable?
- C3
- A3
- A2
- B2
22: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When there are sprinklers above
- When its white
- When it's used as part of a supply or return air system
23: 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
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: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113