Topics: ASHRAE/CMR
1: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24
2: Which refrigerant class listed below is the most flammable?
- A-3
- A-1
- B-2
- C-3
3: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
4: What refrigerant is an inorganic compound?
- Ammonia
- R-132A
- R-22
- R-410A
5: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
- OSHA approved
6: When should a relief valve start to function?
- Before the purge station discharges
- At it's set pressure
- 10 psi before it's set pressure
- Two times it's working pressure
7: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
8: What is Trichlorotrifluoromethane?
- R-13
- R-113
- R-11
- R-12
9: R-123 belongs to Group
- A-3
- B-3
- B-2
- B-1
10: Who is permitted to access a refrigeration machine room?
- Any employee
- Anyone, it's a completely safe area
- Authorized persons only
- Contractors only
11: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-113
- R-12
- R-11
12: Class 3 refrigerants are
- non-flammable
- toxic
- non-toxic
- highly flammable
13: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- A group sensing
- phosgene gas sening
- CO Sensing
14: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
15: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
16: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 1000F
- 600F
- 800F
17: R-717 is
- carbon dioxide
- trichloromethane
- ammonia
- water
18: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 50
- 100
- 350
19: A movie theater would be considered a
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
20: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UR
- UL and UM
- UM or UL
- UV or UR
21: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
22: Halogen refrigerants are corrosive to which type of metal?
- magnesium
- copper
- black iron
- stainless steel
23: A declaration test is needed when the system contains more than
- 55 lbs
- 65 lbs
- 120 lbs
- 110 lbs
24: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 1
- 20
25: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 50
- 25
- 66