Topics: ASHRAE/CMR
1: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 50
- 55
- 75
- 15
2: Ammonia (NH3) is a group III refrigerant
- True
- False
3: How many flammability classifications are refrigerants in?
- 2
- 7
- 5
- 3
4: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
5: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 120 lbs
- 110 lbs
6: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
7: Ammonia belongs to Group
- A-1
- A-2
- B-1
- B-2
8: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices
9: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Classifed
- Certified
10: How many groups of refrigerants are there?
- 1
- 5
- 3
- 7
11: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
12: A High-Probablity 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 failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
13: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Contractor who last serviced the system.
- Board of Boilers
- Person who pulled the permit
14: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or more
- 3 cubic feet or less
- 15 square feet or less
15: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Have it inspected
16: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there are sprinklers above
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
17: How many gallons of water do you need per pound of ammonia?
- 1
- 50
- 10
- 100
18: What pipe can not be used for refrigeration?
- K
- L
- M
- N
19: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24
20: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UM” and “UV”
- “UV”
- “U” or “UM”
- “UL”
21: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.25'
- 7.00'
- 8'4"
- 9.00'
22: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
23: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 1 week
- 14 days
24: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- the form or certificate shall be authorized by the Department of Public Safety
25: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-134A
- R-12
- R-22