Topics: ASHRAE/CMR
1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 36
- 18
2: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Zinc
- Nickel
- Magnesium
3: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
4: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- low pressure
- high pressure
- design pressure
5: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
6: A class A3 refrigerant is considered
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
7: A hotel is considered a _______ occupancy.
- residential
- commercial
- institutional
- mercantile
8: High pressure controls should be set no higher than
- 25% of set point
- 10% of set point
- 90% of set point
- 80% of set point
9: Which refrigerant replaced R-12?
- R-134A
- R-407A
- R-410A
- R-22
10: How many gallons of water do you need per pound of ammonia?
- 100
- 50
- 1
- 10
11: 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
12: A movie theater would be considered a
- mixed occupancy
- institutional occupancy
- commercial occupancy
- public assembly occupancy
13: A Low-Probability System
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
14: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- 20 CFM
- .5 CFM
- 5 CFM
15: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 100
- 10,000
- 1,000
16: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.2
- 2.2
- 1.5
17: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
18: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
19: Pipe identification labels are required when the system contains more than
- 120 lbs
- 55 lbs
- 65 lbs
- 110 lbs
20: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
21: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Foot valve
- Moisture indicator
- Stop valve
22: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
23: Most CFC's are
- inert but toxic
- toxic
- flammable
- inert
24: What is an egress?
- An escape route
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- A code violation
25: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Stainless Steel
- Copper
- Magnesium alloy