Topics: ASHRAE/CMR
1: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
2: What refrigerant is an inorganic compound?
- R-132A
- R-22
- R-410A
- Ammonia
3: 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.
- 350
- 50
- 550
- 100
4: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
5: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
6: What pipe can not be used for refrigeration?
- N
- K
- L
- M
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
- licensed technician
- licensed welder
- welder qualified
- competent welder
8: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
9: The color code of a tank of ammonia is
- lavender
- silver
- light green
- white
10: How far from the ground does a relief valve need to be?
- At least 25' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
11: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
12: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
13: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- the same
- there is no Group B1 refrigerants
- lower
- higher
14: 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
15: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Nothing must be done
16: Halogen refrigerants are corrosive to which type of metal?
- copper
- black iron
- stainless steel
- magnesium
17: How many different groups of refrigerants are there?
- 7
- 15
- 3
- 11
18: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
19: NH3 is
- ammonia
- R-508A
- lithium bromide
- R-718
20: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Large mercantile
- Industrial
- Instituional
21: 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
22: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
23: R-22 falls under which safety classification?
- A-2
- A-1
- B-1
- B-2
24: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Ducted and sealed
- Welded and seamed.
- Insulated and cross broke
25: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above