Topics: ASHRAE/CMR
1: What is R-22?
- HFC
- Chlorodifluoromethane
- CCFCM
- Chlorofluoromethane
2: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Nothing must be done
4: R-22 is considered a(n)
- HFC
- HCFCH
- CFC
- HCFC
5: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 30'
- At least 40'
- There is no minimum for relief valve and windows.
- At least 20'
6: How many flammability classifications are refrigerants in?
- 5
- 2
- 7
- 3
7: Machinery rooms must be vented to ______?
- basement
- outdoors
- unoccupied spaces
- neutralizing tank
8: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
9: How many different groups of refrigerants are there?
- 7
- 15
- 3
- 11
10: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 80%
- 90%
- 100%
11: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the vapor side of the system
- the liquid side of the system
- low side of the system
12: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 1000F
- 700F
13: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- A group sensing
- phosgene gas sening
- refrigerant sensing
14: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
15: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
- When there are sprinklers above
16: 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.
- 50
- 15
- 75
- 55
17: All electrical work done on refrigeration systems must comply with
- Department of Energy
- NEC and Massachusetts Modifications
- OSHA
- ASHREA-15 Section 9.2.1
18: What section governs pressure vessels?
- Section 8 ASHREA 15 ASME unfired
- Section 1 ASHREA 15 ASME fired
- OSHA
- Section ASHREA 34
19: What refrigerant doesn't have to be classifted?
- R-134a
- R-711
- R-718
- R-717
20: 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
21: R-717 is
- water
- carbon dioxide
- ammonia
- trichloromethane
22: Ammonia can come in contact with _______ ?
- Copper
- Copper tubing
- Aluminum
- Brass
23: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
24: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
25: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- condenser
- service valve