Topics: ASHRAE/CMR
1: What type of copper is not permitted on refrigeration systems?
- Type K
- Type M
- Type N
- Type L
2: Who is permitted to access a refrigeration machine room?
- Authorized persons only
- Any employee
- Anyone, it's a completely safe area
- Contractors only
3: B3 refrigerants are considered
- non-toxic but non-flammable
- non-toxic but flammable
- toxic and highly flammable
- toxic but non-flammable
4: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- the same
- there is no Group B1 refrigerants
- lower
5: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
6: What refrigerant doesn't have to be classified?
- R-718
- R-422A
- R-717
- R-134A
7: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
8: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Leak tested
- Inspected
- Pressurized
9: 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
- 15
- 75
- 50
10: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An escape route
- A code violation
- An entrance or exit
11: 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
12: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 110 lbs
- 120 lbs
13: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 1,000
- 100
- 100,000
14: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 50
- 25
16: Large mercantile occupancy is
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
17: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
18: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
19: NH3 is
- R-718
- ammonia
- R-508A
- lithium bromide
20: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- every 18 months
- annually
21: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
22: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- self-closing doors
- automatic ventilation
- tight fitting doors
23: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
24: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
25: A class A3 refrigerant is considered
- non-toxic but highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable