Topics: ASHRAE/CMR
1: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
2: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 20'
- At least 30'
3: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
4: Large mercantile occupancy is
- 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 of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- 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 or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
5: How many gallons of water do you need per pound of ammonia?
- 100
- 10
- 50
- 1
6: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 50
- 18
- 22
7: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
8: Pipe identification labels are required when the system contains more than
- 110 lbs
- 55 lbs
- 120 lbs
- 65 lbs
9: 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, 3.0
- 6.6, 6.6
- 2.5, 2.5
10: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- illegal occupancy
- institutional occupancy
- public assembly occupancy
- commercial occupancy
11: How far from the ground does a relief valve need to be?
- At least 25' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
12: When an inspection is needed, how often must it be done?
- annually
- every 18 months
- every 36 months
- every 24 months
13: R-123 belongs to Group
- B-2
- B-1
- B-3
- A-3
14: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
- color codes
15: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 2.5
- 5.5
16: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- T&P device
- Circuit Breaker
- Relief valve
17: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and non-flammable
18: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
19: A professional or office building would be considered what type of occupancy?
- public assembly
- commercial
- business
- mercantile
20: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
21: Relief valves are rated in
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
- pounds of air per hour
22: What refrigerant were phased out in 2004?
- R-12
- R-11
- R-134a
- R-22
23: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
24: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
25: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/16"
- 1/8"
- 3/32"