Topics: ASHRAE/CMR
1: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
2: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 350
- 50
- 550
3: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UR
- UV or UR
- UM or UL
- UL and UM
5: Large mercantile occupancy is
- 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 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 200 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.
6: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 1,000
- 100
- 10,000
7: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
8: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class B machinery room
- Class A machinery room
- Class M machinery room
9: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
10: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 3.0, 3.5
- 2.5, 2.5
- 6.6, 6.6
- 2.5, 3.0
11: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on best case Fractionation
- Blends don't have to be classified
- Based on the oil used
12: How many refrigerant classifications are there for flammability?
- 2
- 3
- 1
- 7
13: A movie theater would be considered a
- commercial occupancy
- institutional occupancy
- mixed occupancy
- public assembly occupancy
14: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 80%
- 90%
- 99%
15: R-11 belongs to Group
- A-1
- B-1
- B-3
- A-2
16: What is not a requirement of a Class T machine room?
- Tight fitting doors
- Automatic ventilation
- Fire hose connected to the building fire protection system.
- Self-closing doors
17: What refrigerant were phased out in 2004?
- R-134a
- R-11
- R-12
- R-22
18: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 550 lbs
- 330 lbs.
- 660 lbs
19: R-22 falls under which safety classification?
- B-2
- A-1
- B-1
- A-2
20: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 50
- 18
- 33
21: When an inspection is needed, how often must it be done?
- annually
- every 18 months
- every 24 months
- every 36 months
22: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless steel
- Aluminum
- Copper
23: Which refrigerant class listed below is the most flammable?
- A-3
- C-3
- B-2
- A-1
24: 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
25: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above