Topics: ASHRAE/CMR
1: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Copper
- Aluminum
- Zinc
2: Large mercantile occupancy is
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
3: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
4: How many gallons of water do you need per pound of ammonia?
- 50
- 10
- 1
- 100
5: What refrigerant doesn't have to be classified?
- R-134A
- R-422A
- R-718
- R-717
6: 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.
7: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Magnesium alloy
- PVC
- Copper
8: A movie theater would be considered a
- commercial occupancy
- institutional occupancy
- public assembly occupancy
- mixed occupancy
9: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24
10: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
11: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Copper
- Zinc
- Magnesium
12: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- B-2
- A-1
- A-2
13: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
14: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-22
- R-123
- R-12
15: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the outdoors
- the return air ducted system
- the mechanical room housing the refrigeration system
16: 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
17: How many different groups of refrigerants are there?
- 7
- 3
- 11
- 15
18: The gauge thickness required on a CO2 tank construction is
- 3/32"
- 5/16"
- 1/16"
- 1/8"
19: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- illegal occupancy
- commercial occupancy
- institutional occupancy
20: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- the same
- there is no Group B1 refrigerants
- lower
21: A hotel is considered a _______ occupancy.
- residential
- mercantile
- commercial
- institutional
22: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
23: The Board of Boilers adopts by reference
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
24: R-22 falls under which safety classification?
- A-1
- A-2
- B-1
- B-2
25: 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