Topics: ASHRAE/CMR
1: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-2
- A-1
- B-1
- B-2
2: What is an egress?
- An escape route
- A code violation
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
3: What type of relief valve is used on a CO2 system?
- glove disc
- rupture disc
- fusible plug
- gate valve
4: How many flammability classifications are refrigerants in?
- 5
- 2
- 7
- 3
5: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200
6: What would be the classification for Stop & Shop grocery store?
- Industrial
- Instituional
- Large mercantile
- Place of assembly
7: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- mixed occupancy
- large mercantile occupancy
8: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
- Flammability and temperature range
9: Which refrigerant class listed below is the most flammable?
- A2
- A3
- B2
- C3
10: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
11: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- industrial
- redifential
- commercial
12: Which refrigerant replaced R-12?
- R-407A
- R-410A
- R-22
- R-134A
13: What must be done to refrigerant pipes before being buried?
- Certified
- Encased
- Leaked checked
- Coated
14: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
15: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
16: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 50
- 25
- 66
17: What happens after your initial inspection of a pressure vessel?
- Notify the AHJ to let them know that the system been inspected
- 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 Fire Marshal that the system has been inspected and approved
18: What is an example of institutional occupancy?
- Football stadium
- Shopping mall
- Dorms
- Hospital
19: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
20: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- 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 can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
21: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Have it inspected
- Insulate the suction line before you take a superheat reading
- Add refrigerant
22: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
23: Joints in refrigeration piping must be _____ before being covered?
- Pressurized
- Leak tested
- Insulated
- Inspected
24: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
25: Pipe identification labels are required when the system contains more than
- 110 lbs
- 65 lbs
- 55 lbs
- 120 lbs