Topics: ASHRAE/CMR
1: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
2: How many refrigerant classifications are there for flammability?
- 2
- 1
- 7
- 3
3: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per minute
- pounds of air per hour
4: Class 3 refrigerants are
- non-toxic
- highly flammable
- toxic
- non-flammable
5: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
6: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- HCFC-123
- CFC-11
- ammonia
- Lithium bromide
7: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 600F
- 800F
- 700F
8: R-22 falls under which safety classification?
- B-1
- A-2
- A-1
- B-2
9: What refrigerant were phased out in 2004?
- R-12
- R-134a
- R-11
- R-22
10: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 18
- 48
- 24
- 36
11: All electrical work done on refrigeration systems must comply with
- Department of Energy
- OSHA
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
12: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 18
- 33
13: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
14: Most CFC's are
- inert
- flammable
- toxic
- inert but toxic
15: R-11 belongs to Group
- B-3
- B-1
- A-2
- A-1
16: What is Trichlorotrifluoromethane?
- R-13
- R-113
- R-11
- R-12
17: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
18: A Low-Probability System
- 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 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
19: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Copper
- Magnesium alloy
- Aluminum
20: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
21: What type of copper is not permitted on refrigeration systems?
- Type M
- Type K
- Type L
- Type N
22: Which refrigerant class listed below is the most flammable?
- C-3
- A-1
- B-2
- A-3
23: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class M machinery room
- Class A machinery room
- Class T machinery room
24: How many refrigerant classifications are there for toxicity?
- 1
- 3
- 5
- 2
25: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less