Topics: ASHRAE/CMR
1: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When its white
- When there is a space 6' or more above it
- When there are sprinklers above
2: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 12"
- 18"
- 24"
3: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UL and UR
- UV or UR
5: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 660 lbs
- 55 lbs
- 550 lbs
6: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
7: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
8: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- fusion plug
- rupture plug
- fusible plug
9: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
10: 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
11: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
12: Most CFC's are
- inert but toxic
- flammable
- toxic
- inert
13: 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
14: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 50
- 25
15: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
16: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 10
- 18
- 24
17: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- nothing must be done
- make sure it's compatible, notify owner, notify A.H.J
- you can't change refrigerants
18: Liquid level gauges must be provided with what?
- A low level mark
- A red line
- Automatic shut-offs
- A relief valve
19: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
20: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
21: What section of ASHRAE-15 governs pressure vessels?
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
- OSHA
22: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- every 18 months
- annually
23: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- basement
- outdoors
24: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
25: What is Trichlorotrifluoromethane?
- R-11
- R-13
- R-12
- R-113