Topics: ASHRAE/CMR
1: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
2: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
3: Ammonia is under what safety classification?
- B1
- B2
- B3
- A3
4: 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
5: When should a relief valve start to function?
- Two times it's working pressure
- 10 psi before it's set pressure
- At it's set pressure
- Before the purge station discharges
6: 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
7: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 1
- 5
8: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- over pressure protection
- 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
9: All serviceable components of a refrigeration system shall be provided with
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- service manuals
10: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
11: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
12: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- OSHA
- Department of Energy
13: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
14: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- lower
- higher
- the same
15: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UV”
- “UL”
- “U” or “UM”
- “UM” and “UV”
16: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/16"
- 3/32"
- 1/8"
17: Ammonia belongs to Group
- A-2
- B-1
- A-1
- B-2
18: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
19: The color code of a tank of ammonia is
- white
- lavender
- light green
- silver
20: NH3 is
- R-508A
- ammonia
- lithium bromide
- R-718
21: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-134a
- R-717
22: 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.
- 80
- 100
- 110
- 90
23: 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.
24: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- OSHA
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
25: How far from the ground does a relief valve need to be?
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade