Topics: ASHRAE/CMR
1: A movie theater would be considered a
- commercial occupancy
- institutional occupancy
- public assembly occupancy
- mixed occupancy
2: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- nothing must be done
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- place sign, check for leaks, insulate
3: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually
- Annually and when installed
- Not required
4: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices
5: 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
6: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- mercantile occupancy
- commercial occupancy
7: A professional or office building would be considered what type of occupancy?
- commercial
- mercantile
- business
- public assembly
8: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-2
- A-1
- B-2
9: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- insulated
- installed through a pipe casing
- moisture barrier
10: What would be the classification of a church?
- Place of assembly
- Industrial
- Large mercantile
- Institutional
11: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
- Flammability and temperature range
12: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
13: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100,000
- 100
- 10,000
14: Ammonia can come in contact with _______ ?
- Brass
- Copper
- Aluminum
- Copper tubing
15: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 250
- 400
- 350
- 100
16: Which refrigerant class listed below is the most flammable?
- A2
- A3
- C3
- B2
17: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- 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 unoccupied space
18: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs.
- 550 lbs
- 55 lbs
19: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 50
- 22
- 66
20: 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.
- 90
- 80
- 110
- 100
21: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- there is no Group B1 refrigerants
- lower
- higher
22: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
23: Ammonia (NH3) is a group III refrigerant
- True
- False
24: Which refrigerant replaced R-12?
- R-407A
- R-22
- R-410A
- R-134A
25: NH3 is
- R-718
- R-508A
- lithium bromide
- ammonia