Topics: ASHRAE/CMR
1: A declaration test is needed when the system contains more than
- 120 lbs
- 65 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: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
4: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 25
- 10
- 15
5: 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
6: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
7: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-12
- R-113
8: What is Trichlorotrifluoromethane?
- R-11
- R-12
- R-13
- R-113
9: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Moisture indicator
- Foot valve
- Stop valve
10: How many groups of refrigerants are there?
- 5
- 7
- 3
- 1
11: Which refrigerant replaced R-12?
- R-407A
- R-134A
- R-22
- R-410A
12: 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
13: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
14: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
15: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- CCFCM
- HFC
16: What type of material can't be used on the outlet of a relief valve?
- Magnesium alloy
- PVC
- Stainless steel
- Copper
17: 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
18: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- phosgene gas sening
- CO Sensing
- refrigerant sensing
19: R-22 falls under which safety classification?
- A-2
- A-1
- B-2
- B-1
20: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
21: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 50
- 18
- 22
22: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
23: 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.
- 7.00'
- 7.25'
- 8'4"
- 9.00'
24: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
25: Refrigerants shall be classified by
- toxicity and flammability
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- color codes