Topics: ASHRAE/CMR
1: R-11 belongs to Group
- A-2
- B-1
- A-1
- B-3
2: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Have it inspected
- Document the superheat and subcooling reading
3: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Stainless Steel
- Magnesium alloy
- Copper
4: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
5: Stop valves shall not be permitted between the system and the
- service valve
- bleed valve
- condenser
- relief valve
6: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When there are sprinklers above
- When it's used as part of a supply or return air system
- When its white
7: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Aluminum
- Zinc
- Magnesium
8: When must refrigeration system covered by the code be inspected?
- Not required
- Annually
- Annually and when installed
- Upon installation
9: How many groups of refrigerants are there?
- 1
- 7
- 5
- 3
10: What is an egress?
- A code violation
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- An escape route
11: What would be the classification for Stop & Shop grocery store?
- Industrial
- Instituional
- Large mercantile
- Place of assembly
12: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
13: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
14: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- PVC
- Copper
- Aluminum
15: 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.
- 25
- 10
- 15
- 20
16: 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.
- 2.5, 2.5
- 6.6, 6.6
- 2.5, 3.0
- 3.0, 3.5
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 55 lbs
- 660 lbs
- 330 lbs
18: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's water
- Because it's cheap
19: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-113
- R-502
- R-11
20: High pressure controls should be set no higher than
- 25% of set point
- 80% of set point
- 10% of set point
- 90% of set point
21: R-123 belongs to Group
- A-3
- B-1
- B-2
- B-3
22: What is not a requirement of a class T machine room?
- self-closing doors
- fire hose connection to the building fire protection system
- tight fitting doors
- automatic ventilation
23: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 100%
- 90%
24: What is the intention of the word “shall” as used in the code?
- A mandatory requirement
- A recommendation or advisory guideline
- A technician’s choice of how it should be done
- None of the above
25: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- mixed occupancy
- institutional occupancy
- public assembly occupancy