Topics: ASHRAE/CMR
1: What type of material can't be used on the outlet of a relief valve?
- PVC
- Copper
- Stainless steel
- Magnesium alloy
2: R-22 falls under which safety classification?
- B-2
- A-2
- B-1
- A-1
3: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- mixed occupancy
- institutional occupancy
- commercial occupancy
4: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
5: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-502
- R-113
6: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- business occupancy
- commercial occupancy
- public assembly occupancy.
7: A hotel is considered a _______ occupancy.
- residential
- commercial
- mercantile
- institutional
8: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
9: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
- Place sign, check for leaks, insulate
- Nothing must be done
10: When an inspection is needed, how often must it be done?
- every 24 months
- annually
- every 18 months
- every 36 months
11: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- 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 an unoccupied space
- is a system highly likely to leak form a failed connection or component of such system
12: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
13: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
14: 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 R-718
- Flush with RX-11
- Flush with R-11
- Flush with ammonia
15: How many different groups of refrigerants are there?
- 11
- 7
- 15
- 3
16: A professional or office building would be considered what type of occupancy?
- business
- commercial
- public assembly
- mercantile
17: How many flammability classifications are refrigerants in?
- 7
- 2
- 5
- 3
18: What is an egress?
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- An escape route
- A code violation
19: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
20: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
21: Ammonia can come in contact with _______ ?
- Copper tubing
- Brass
- Aluminum
- Copper
22: 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.
- 80
- 100
- 90
- 110
23: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Classifed
- Certified
24: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Foot valve
- Muffler
- Stop valve
25: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11