Topics: ASHRAE/CMR
1: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
- public assembly occupancy
2: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 2.5
- 5.5
- 3.0
3: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
4: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 7.25'
- Ceiling height
- 72"
5: How many gallons of water per pound of ammonia do you need?
- 1
- 5
- 20
- 15
6: Can ammonia be used on domestic system?
- yes
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons
- no
7: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
8: 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
9: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 20'
- At least 40'
- There is no minimum for relief valve and windows.
- At least 30'
10: 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
11: The gauge thickness required on a CO2 tank construction is
- 3/32"
- 5/16"
- 1/16"
- 1/8"
12: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
13: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- outside the machinery room
- evaporator
- boiler
- compressor
14: What would be the classification of a prison?
- Place of assembly
- Industrial
- Institutional
- Large mercantile
15: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-22
- R-123
- R-12
16: How many flammability classifications are refrigerants in?
- 7
- 2
- 3
- 5
17: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
18: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
19: Ammonia belongs to Group
- B-1
- A-1
- B-2
- A-2
20: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- PVC
- Copper
- Aluminum
21: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- the same
- there is no Group B1 refrigerants
- lower
22: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
23: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
24: 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
25: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-123
- R-22
- R-11