Topics: ASHRAE/CMR
1: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
2: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 75%
- 90%
3: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
4: What does safe access mean?
- Locked doors
- A clear unobstructed path to the equipment and controls
- OSHA approved
- Well-lit exit signs
5: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 20'
- There is no minimum for relief valve and windows.
- At least 30'
- At least 40'
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
7: How many gallons of water do you need per pound of ammonia?
- 10
- 50
- 1
- 100
8: A restaurant is classified as a
- commercial occupancy
- large mercantile occupancy
- public assembly occupancy
- mixed occupancy
9: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
10: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type K
- Type N
11: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
12: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Copper
- Zinc
- Nickel
13: The color code of a tank of ammonia is
- lavender
- light green
- white
- silver
14: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
15: The Department that certifies the transportation of refrigerant is the
- EPO
- DOT
- EPA
- RSES
16: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
17: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
18: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
19: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
20: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
21: R-22 is considered a(n)
- HCFCH
- HCFC
- CFC
- HFC
22: NH3 is
- lithium bromide
- R-718
- R-508A
- ammonia
23: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
24: What type of material can't be used on the outlet of a relief valve?
- PVC
- Copper
- Stainless steel
- Magnesium alloy
25: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system