Topics: ASHRAE/CMR
1: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
2: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 6'
- 7.25'
- 72"
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- place sign, check for leaks, insulate
4: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs
- 500 lbs
- 55 lbs
- 660 lbs
5: The Board of Boilers adopts by reference
- the MACS Pressure Vessel Code of Massachusetts
- Montreal Protocol Safety Code
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
6: What type of relief valve is used on a CO2 system?
- rupture disc
- fusible plug
- gate valve
- glove disc
7: How many groups of refrigerants are there?
- 3
- 7
- 5
- 1
8: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
9: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Insulated
- Inspected
10: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 330
- 6.6
- 1,000
11: What pipe can not be used for refrigeration?
- M
- K
- L
- N
12: What does safe access mean?
- Well-lit exit signs
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Locked doors
13: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
14: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 1.5
- 2.2
- 1
15: A class B1 refrigerant is considered
- toxic but non-flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
16: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 1000F
- 800F
- 600F
18: 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
19: What would be the classification of a church?
- Institutional
- Industrial
- Place of assembly
- Large mercantile
20: How many different groups of refrigerants are there?
- 7
- 11
- 3
- 15
21: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
22: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
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: Halogen refrigerants are corrosive to which type of metal?
- copper
- magnesium
- black iron
- stainless steel
25: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 30'
- 25'
- 15'