Topics: ASHRAE/CMR
1: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Copper
- Aluminum
- PVC
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 55 lbs
- 660 lbs
3: High pressure controls should be set no higher than
- 10% of set point
- 25% of set point
- 90% of set point
- 80% of set point
4: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 5/16"
- 3/32"
- 1/16"
5: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- higher
- the same
- there is no Group B1 refrigerants
6: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 30 days
- 2 months
- 1 week
7: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
8: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
- Flammability and temperature range
9: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with RX-11
- Flush with R-718
- Flush with ammonia
- Flush with R-11
10: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
11: 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
12: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Nothing must be done
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
13: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
14: R-123 belongs to Group
- A-3
- B-3
- B-2
- B-1
15: R-717 is
- carbon dioxide
- trichloromethane
- ammonia
- water
16: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 110
- 100
- 80
17: What would be the classification of a prison?
- Large mercantile
- Place of assembly
- Industrial
- Institutional
18: What is not a requirement of a class T machine room?
- self-closing doors
- tight fitting doors
- automatic ventilation
- fire hose connection to the building fire protection system
19: What is an egress?
- An escape route
- A code violation
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
20: 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
21: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
- do not need pressure relief protection
22: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- A group sensing
- phosgene gas sening
- CO Sensing
23: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- condenser
- bleed valve
24: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Muffler
- Foot valve
- Stop valve
25: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 7.25'
- 72"
- 6'