Topics: ASHRAE/CMR
1: What is Trichlorotrifluoromethane?
- R-12
- R-11
- R-113
- R-13
2: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
3: How many gallons of water per pound of ammonia do you need?
- 1
- 5
- 15
- 20
4: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 20
- 10
- 15
- 25
5: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
6: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 25
- 50
7: 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
8: High pressure controls should be set no higher than
- 90% of set point
- 25% of set point
- 10% of set point
- 80% of set point
9: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's water
10: 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
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- design pressure
- high pressure
- low pressure
12: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 1,000
- 110
- 330
- 6.6
13: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
14: How many gallons of water do you need per pound of ammonia?
- 10
- 100
- 50
- 1
15: When must refrigeration system covered by the code be inspected?
- Not required
- Annually and when installed
- Annually
- Upon installation
16: Large mercantile occupancy is
- 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 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 or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
17: No open flames are allowed in the machinery room unless?
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
- Approved by the authorized person
- Approved by the installing contractor
18: What is not a requirement of a class T machine room?
- self-closing doors
- fire hose connection to the building fire protection system
- automatic ventilation
- tight fitting doors
19: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Aluminum
- Copper
20: What refrigerant doesn't have to be classified?
- R-718
- R-422A
- R-134A
- R-717
21: What is an example of institutional occupancy?
- Shopping mall
- Dorms
- Football stadium
- Hospital
22: The color code of a tank of ammonia is
- lavender
- light green
- silver
- white
23: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 18
- 36
24: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Copper
- Magnesium alloy
- PVC
25: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.