Topics: ASHRAE/CMR
1: 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
2: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
- does not require a pressure-limiting device
- shall be inspected by the Boiler of Inspectors bi-annually
3: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
4: What refrigerant were phased out in 2004?
- R-22
- R-134a
- R-11
- R-12
5: 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
6: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
7: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 1000F
- 600F
- 800F
8: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
9: Who is permitted to access a refrigeration machine room?
- Any employee
- Contractors only
- Anyone, it's a completely safe area
- Authorized persons only
10: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 24
- 15
- 10
11: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Nothing must be done
12: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
13: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection and a rupture disc
- over pressure protection
14: Who approves containers for refrigerants?
- D.O.T
- E.P.A
- D.O.D
- D.O.E
15: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 110
- 90
- 100
- 80
16: What is an example of institutional occupancy?
- Hospital
- Dorms
- Shopping mall
- Football stadium
17: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
18: Large mercantile occupancy is
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
19: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 1
- 15
20: What refrigerant is an inorganic compound?
- R-132A
- R-410A
- R-22
- Ammonia
21: Relief valves are rated in
- pounds of air per hour
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
22: R-22 falls under which safety classification?
- A-2
- B-1
- B-2
- A-1
23: How many groups of refrigerants are there?
- 5
- 7
- 3
- 1
24: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 20
- 15
- 10
- 25
25: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation