Topics: ASHRAE/CMR
1: NH3 is
- R-508A
- ammonia
- lithium bromide
- R-718
2: How many refrigerant classifications are there for flammability?
- 2
- 1
- 3
- 7
3: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
4: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100,000
- 100
- 10,000
5: 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
6: 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
7: What is an example of institutional occupancy?
- Football stadium
- Shopping mall
- Dorms
- Hospital
8: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs
- 55 lbs
- 660 lbs
- 500 lbs
9: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- A-2
- B-1
10: 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 40'
- At least 30'
- At least 20'
11: The color code of a tank of ammonia is
- silver
- white
- light green
- lavender
12: Pipe identification labels are required when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
13: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
14: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- every 18 months
- annually
15: 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
16: A movie theater would be considered a
- commercial occupancy
- institutional occupancy
- mixed occupancy
- public assembly occupancy
17: 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
18: A positive displacement compressor is
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
19: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
20: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
21: Machinery rooms must be vented to ______?
- unoccupied spaces
- neutralizing tank
- basement
- outdoors
22: A Low-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
23: 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
24: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
25: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 550 lbs
- 660 lbs
- 55 lbs