Topics: ASHRAE/CMR
1: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 25'
- 20'
- 30'
2: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 8'4"
- 7.25'
- 7.00'
- 9.00'
3: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
4: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Certified
- Classifed
- Insulated and installed in a pipe duct (Encased)
5: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- critical pressure
- high pressure
- low pressure
6: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- quarterly
- bi-annually
- regularly
7: 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.
8: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
9: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
10: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
11: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 15
- 75
- 20
12: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
13: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- fusible plug
- fusion plug
- rupture plug
14: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
15: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
16: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and toxicity
- Weight and color
- Flammability and temperature range
17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 1000F
- 700F
18: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- the same
- lower
- there is no Group B1 refrigerants
19: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- nothing must be done
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- place sign, check for leaks, insulate
21: Most CFC's are
- toxic
- flammable
- inert
- inert but toxic
22: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 20
- 1
23: Class A refrigerants are considered
- flammable
- non-toxic
- non-flammable
- toxic
24: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Aluminum
- Copper
- Magnesium alloy
25: What does safe access mean?
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved