Topics: ASHRAE/CMR
1: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- compressor
- boiler
- outside the machinery room
- evaporator
2: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.5
- 3.0
- 2.0
3: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100
- 1,000
- 100,000
- 10,000
4: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
5: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Football stadium
- Hospital
6: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the liquid side of the system
- high side of the system
- the vapor side of the system
7: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Encased
- Certified
8: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
9: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- zone valve
- high limit control
10: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- installed through a pipe casing
- moisture barrier
- leak checked
11: Large mercantile occupancy is
- 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 or that portion of a premise where more than 1500 persons congregate on levels above or 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 200 persons congregate on levels above or below street level to purchase personal merchandise
12: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such 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 can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
13: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
14: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
15: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
16: 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
17: R-22 falls under which safety classification?
- A-2
- A-1
- B-2
- B-1
18: What pipe can not be used for refrigeration?
- L
- K
- M
- N
19: R-123 belongs to Group
- B-3
- B-2
- B-1
- A-3
20: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
21: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
22: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on best case Fractionation
- Based on worst case fractionation
- Based on the oil used
23: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
24: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 15'
- 25'
- 20'
25: 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
- you can never change refrigerants
- Make sure its compatible, notify owner, and notify AHJ.