Topics: ASHRAE/CMR
1: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Aluminum
- Zinc
2: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Rupture disk
- Gate valve
- Glove valve
3: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 400
- 100
- 350
- 250
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-22
- R-11
- R-12
5: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
6: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- Temperature limiter device
- Relief valve
- T&P device
7: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
8: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-134A
- R-22
- R-123
9: A positive displacement compressor is
- is a reciprocating type compressor with 2 or more pistons
- 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 pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
10: Can you use Ammonia in industrial applications?
- When mixed with R-718
- Yes, Under certain condidtions
- Yes, always
- No, never
11: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Board of Boilers
- Person in charge of the facility
- Contractor who last serviced the system.
12: A High-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 an unoccupied 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 will enter the occupied space
13: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 13.9 lbs
- 22 lbs
- 44 lbs
14: How many groups of refrigerants are there?
- 7
- 5
- 1
- 3
15: 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 R-718
- Flush with RX-11
- Flush with ammonia
- Flush with R-11
16: Class 3 refrigerants are
- non-flammable
- highly flammable
- toxic
- non-toxic
17: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 90%
- 80%
18: Most CFC's are
- flammable
- inert but toxic
- inert
- toxic
19: R-22 falls under which safety classification?
- B-1
- A-2
- B-2
- A-1
20: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 50
- 22
- 33
21: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 15'
- 20'
- 30'
22: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 550 lbs
- 330 lbs.
23: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
24: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- color codes
- requirements for commercial, industrial, and residential occupancies
25: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 200
- 150
- 100