Topics: ASHRAE/CMR
1: Can you use Ammonia in industrial applications?
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
- No, never
2: A declaration test is needed when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
3: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
4: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Have it inspected
- Add refrigerant
5: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
6: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
7: 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
8: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- PVC
- Copper
9: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 75%
- 80%
10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 3.0
- 5.5
- 2.5
- 2.0
11: 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.
- 10
- 20
- 25
- 15
12: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
13: 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
- 2.5, 3.0
- 3.0, 3.5
- 6.6, 6.6
14: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When it's used as part of a supply or return air system
- When its white
- When there is a space 6' or more above it
15: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
16: A movie theater would be considered a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- institutional occupancy
17: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- nothing must be done
- place sign, check for leaks, insulate
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
18: What type of material can't be used on the outlet of a relief valve?
- Copper
- Magnesium alloy
- PVC
- Stainless steel
19: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- safe access
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
21: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
22: 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
23: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
24: 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
25: Can ammonia be used on domestic system?
- no
- yes
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons