Topics: ASHRAE/CMR
1: A declaration test is needed when the system contains more than
- 65 lbs
- 120 lbs
- 55 lbs
- 110 lbs
2: 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
3: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
4: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Flanged and gasketed
- Welded and seamed.
- Insulated and cross broke
5: Who approves containers for refrigerants?
- D.O.T
- D.O.D
- D.O.E
- E.P.A
6: What type of copper is not permitted on refrigeration systems?
- Type N
- Type K
- Type L
- Type M
7: How many different groups of refrigerants are there?
- 3
- 15
- 11
- 7
8: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When there are sprinklers above
- When its white
10: Halogen refrigerants are corrosive to which type of metal?
- copper
- black iron
- magnesium
- stainless steel
11: 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.
- 75
- 55
- 15
- 50
12: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- 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
- A field inspection shall be made before it is put into service
13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 500 lbs
- 660 lbs
- 330 lbs
14: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 3.0
- 2.5
- 5.5
- 2.0
15: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
16: When should a relief valve start to function?
- 10 psi before it's set pressure
- Before the purge station discharges
- At it's set pressure
- Two times it's working pressure
17: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Classifed
- Insulated and installed in a pipe duct (Encased)
- Leak checked
18: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
19: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
20: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- service manuals
- safe access
21: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
22: 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
23: What is a Category "M" fluid?
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
24: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial
25: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above