Topics: ASHRAE/CMR
1: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
2: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- PSIA
- Pounds of air per minute.
3: R-22 falls under which safety classification?
- A-2
- A-1
- B-2
- B-1
4: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
- At least 25' above grade
5: What is not a requirement of a class T machine room?
- tight fitting doors
- fire hose connection to the building fire protection system
- self-closing doors
- automatic ventilation
6: What type of relief valve is used on a CO2 system?
- fusible plug
- glove disc
- gate valve
- rupture disc
7: 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 will enter the occupied space
- 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
8: What is Trichlorotrifluoromethane?
- R-11
- R-12
- R-13
- R-113
9: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with RX-11
- Flush with R-11
- Flush with R-718
- Flush with ammonia
10: 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
11: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Insulated and installed in a pipe duct (Encased)
- Certified
- Leak checked
- Classifed
12: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Any employee
- Authorized persons only
13: A declaration test is needed when the system contains more than
- 120 lbs
- 65 lbs
- 55 lbs
- 110 lbs
14: Refrigerants shall be classified by
- toxicity and flammability
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- color codes
15: 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.
- 25
- 10
- 20
- 15
16: Doors communicating with outside from a mechanical room must be?
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
17: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Copper
- Stainless steel
18: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
19: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Make sure its compatible, notify owner, and notify AHJ.
- Place sign, check for leaks, and insulate suction line
- you can never change refrigerants
- Nothing must be done
20: How many refrigerant classifications are there for flammability?
- 7
- 1
- 2
- 3
21: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or less
- 3 cubic feet or more
- 15 square feet or less
22: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- commercial occupancy
- mercantile occupancy
23: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- zone valve
- pressure relief device
- high limit control
24: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
25: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-410A
- R-132A