Topics: ASHRAE/CMR
1: 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
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 55 lbs
- 550 lbs
- 330 lbs.
3: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 50
- 25
4: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- B-1
- A-2
5: The color code of a tank of ammonia is
- light green
- silver
- white
- lavender
6: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
7: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
8: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
9: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- high pressure
- design pressure
- low pressure
10: When an inspection is needed, how often must it be done?
- every 18 months
- every 36 months
- annually
- every 24 months
11: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
12: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 25
- 10
13: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there are sprinklers above
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
14: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices
15: What refrigerant were phased out in 2004?
- R-134a
- R-22
- R-12
- R-11
16: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
17: A restaurant is classified as a
- large mercantile occupancy
- mixed occupancy
- commercial occupancy
- public assembly occupancy
18: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
19: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24
20: A class A3 refrigerant is considered
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
21: What is an example of institutional occupancy?
- Hospital
- Dorms
- Shopping mall
- Football stadium
22: When must refrigeration system covered by the code be inspected?
- Not required
- Annually and when installed
- Upon installation
- Annually
23: What would be the classification for Stop & Shop grocery store?
- Industrial
- Large mercantile
- Instituional
- Place of assembly
24: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Stainless steel
- Copper
25: What type of copper is not permitted on refrigeration systems?
- Type L
- Type M
- Type N
- Type K