Topics: ASHRAE/CMR
1: 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
- 10,000
- 100
- 1,000
2: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
3: Which refrigerant class listed below is the most flammable?
- A2
- C3
- A3
- B2
4: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Copper
- Magnesium alloy
- Stainless Steel
5: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- 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
- is such that any leak will cause injury or death to anyone within a 100 square foot area
6: When must refrigeration system covered by the code be inspected?
- Not required
- Annually and when installed
- Upon installation
- Annually
7: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
8: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- first disconnect in
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
9: Can you use Ammonia in industrial applications?
- When mixed with R-718
- Yes, Under certain condidtions
- Yes, always
- No, never
10: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the outdoors
- the return air ducted system
- the mechanical room housing the refrigeration system
11: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Board of Boilers
- Contractor who last serviced the system.
- Person who pulled the permit
12: What is Trichlorotrifluoromethane?
- R-13
- R-12
- R-11
- R-113
13: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
14: What do you need to do when you install a new system?
- Add refrigerant
- Have it inspected
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
15: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- B-1
- A-2
- A-1
16: When should a relief valve start to function?
- Two times it's working pressure
- At it's set pressure
- Before the purge station discharges
- 10 psi before it's set pressure
17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 25
- 66
- 22
18: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 10'
- 15'
19: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
20: 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
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
22: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
23: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
24: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
25: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above