Topics: ASHRAE/CMR
1: What is an egress?
- An escape route
- A code violation
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
2: How many refrigerant classifications are there for flammability?
- 2
- 7
- 1
- 3
3: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
4: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
5: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- Halon
- CFC
6: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
7: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Copper
- Magnesium
- Aluminum
8: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
9: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusion plug
- fusible plug
- relief plug
10: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
11: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 25
- 22
- 66
12: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually and when installed
- Annually
- Not required
13: How many groups of refrigerants are there?
- 3
- 7
- 1
- 5
14: How many different groups of refrigerants are there?
- 7
- 3
- 11
- 15
15: What pipe can not be used for refrigeration?
- M
- L
- N
- K
16: R-22 is considered a(n)
- HFC
- HCFCH
- CFC
- HCFC
17: 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.
- 75
- 50
- 55
- 15
18: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- PSIA
- PSIG
- temperature minus pounds of air per second divided by release rate squared
19: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on the oil used
- Blends don't have to be classified
- Based on best case Fractionation
20: Ammonia (NH3) is a group III refrigerant
- True
- False
21: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
22: R-22 falls under which safety classification?
- A-1
- B-1
- A-2
- B-2
23: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
- shall use fusible plugs
24: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
25: Ammonia belongs to Group
- A-2
- B-1
- A-1
- B-2