Topics: ASHRAE/CMR
1: 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 welder
- competent welder
- welder qualified
- licensed technician
2: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
3: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
4: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 18"
- 24"
- 12"
5: 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 20'
- At least 40'
- At least 30'
6: The color code of a tank of ammonia is
- lavender
- white
- light green
- silver
7: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 5 CFM
- 20 CFM
8: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
9: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
10: What type of copper is not permitted on refrigeration systems?
- Type K
- Type N
- Type L
- Type M
11: How many refrigerant classifications are there for flammability?
- 3
- 7
- 2
- 1
12: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless Steel
- Magnesium alloy
13: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 50
- 22
- 33
14: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
15: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- MSCA Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
16: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
17: Halogen refrigerants are corrosive to which type of metal?
- copper
- stainless steel
- black iron
- magnesium
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: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-407A
- R-134A
20: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 80%
- 75%
21: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
22: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- higher
- there is no Group B1 refrigerants
- the same
23: Ammonia belongs to Group
- A-2
- B-2
- B-1
- A-1
24: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
25: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 50
- 75
- 55