Topics: ASHRAE/CMR
1: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-11
- R-12
- R-22
2: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- leak checked
- moisture barrier
- installed through a pipe casing
3: What type of material can't be used on the outlet of a relief valve?
- PVC
- Stainless steel
- Magnesium alloy
- Copper
4: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
5: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
6: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
7: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D
8: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
9: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Magnesium
- Zinc
- Copper
10: Which occupancy can ammonia be used in?
- industrial
- depends on the quantity of freon
- commercial
- redifential
11: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
12: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
13: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- the return air ducted system
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
14: How many different groups of refrigerants are there?
- 15
- 3
- 7
- 11
15: What is Trichlorotrifluoromethane?
- R-11
- R-113
- R-13
- R-12
16: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- HCFC-123
- Lithium bromide
- CFC-11
- ammonia
17: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
18: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 14 days
- 1 week
19: What does safe access mean?
- OSHA approved
- Locked doors
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
20: How are refrigerant blends classified?
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
- Blends don't have to be classified
21: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
22: How many flammability classifications are refrigerants in?
- 5
- 2
- 7
- 3
23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- rupture plug
- fusion plug
- fusible plug
24: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
25: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line