Topics: ASHRAE/CMR
1: A class B2 refrigerant is considered
- non-toxic and non-flammable
- toxic and somewhat flammable
- toxic and non-flammable
- non-toxic and highly flammable
2: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Aluminum
- Copper
3: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- PVC
- Copper
- Aluminum
4: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
5: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
6: Machinery rooms must be vented to ______?
- basement
- outdoors
- neutralizing tank
- unoccupied spaces
7: When an inspection is needed, how often must it be done?
- annually
- every 36 months
- every 18 months
- every 24 months
8: R-22 falls under which safety classification?
- B-1
- B-2
- A-2
- A-1
9: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- zone valve
- high limit control
- low limit control
10: What is Trichlorotrifluoromethane?
- R-12
- R-13
- R-11
- R-113
11: What type refrigerant is NOT ozone depleting?
- HFC
- HCFC
- CFC
- Halon
12: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 15
- 24
- 10
13: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 6'
- 72"
- Ceiling height
14: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Muffler
- Moisture indicator
- Stop valve
15: Class 3 refrigerants are
- non-flammable
- toxic
- highly flammable
- non-toxic
16: What pipe can not be used for refrigeration?
- K
- M
- L
- N
17: What would be the classification for Stop & Shop grocery store?
- Industrial
- Large mercantile
- Instituional
- Place of assembly
18: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
19: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there is a space 6' or more above it
- When there are sprinklers above
- When it's used as part of a supply or return air system
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
22: 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
23: 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 low side
- the high side
- 2.5 times the design pressure
- the aggregate of the high side and low side
24: 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.
- “UV”
- “UM” and “UV”
- “UL”
- “U” or “UM”
25: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Locked doors
- Well-lit exit signs