Topics: ASHRAE/CMR
1: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- PSIG
- PSIA
- temperature minus pounds of air per second divided by release rate squared
2: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
3: Ammonia can come in contact with _______ ?
- Brass
- Copper
- Aluminum
- Copper tubing
4: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- rupture plug
- relief plug
5: A High-Probability 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 will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
6: B3 refrigerants are considered
- non-toxic but flammable
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but non-flammable
7: How are refrigerant blends classified?
- Based on best case Fractionation
- Blends don't have to be classified
- Based on worst case fractionation
- Based on the oil used
8: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
9: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 6.6 lbs
- 44 lbs
- 22 lbs
10: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs
- 55 lbs
- 500 lbs
11: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually
- Annually and when installed
- Not required
12: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 72"
- Ceiling height
- 7.25'
13: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
14: Who authorizes changes to the safety codes?
- Contractor who last serviced the system.
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
15: How many flammability classifications are refrigerants in?
- 5
- 7
- 2
- 3
16: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 25'
- 20'
- 15'
17: What pipe can not be used for refrigeration?
- L
- K
- N
- M
18: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's cheap
- Because it's a non-flammable refrigerant
- Because it's water
19: 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
20: R-11 belongs to Group
- B-1
- B-3
- A-2
- A-1
21: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 25'
- 15'
22: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or more
23: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
24: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
25: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices