Topics: ASHRAE/CMR
1: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
2: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
3: 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
4: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
5: What refrigerant doesn't have to be classified?
- R-134A
- R-717
- R-718
- R-422A
6: What pipe can not be used for refrigeration?
- L
- K
- M
- N
7: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.2
- 1.5
- 2.2
8: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
9: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
10: Refrigerant restricted in 2004 but used for transition for decades:
- R-11
- R-123
- R-134A
- R-22
11: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the outdoors
12: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 80%
- 75%
13: What is Trichlorotrifluoromethane?
- R-113
- R-13
- R-12
- R-11
14: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Stop valve
- Foot valve
- Moisture indicator
15: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 3/32"
- 1/8"
- 5/16"
16: When should a relief valve start to function?
- Before the purge station discharges
- At it's set pressure
- Two times it's working pressure
- 10 psi before it's set pressure
17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 22
- 66
- 50
18: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
19: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
20: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
21: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
22: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Encased
- Certified
23: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-711
- R-718
24: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
25: How many groups of refrigerants are there?
- 7
- 1
- 5
- 3