Topics: ASHRAE/CMR
1: Indirect systems using Group II refrigerants
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
2: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
3: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- .5 CFM
- 20 CFM
- 5 CFM
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-12
- R-22
- R-113
5: What is a Category "M" fluid?
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
- 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
6: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
7: Class T machine room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
8: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
9: Halo-carbon refrigerants cannot be used with what material?
- Copper
- Magnesium alloy
- Aluminum
- Stainless Steel
10: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved
- Well-lit exit signs
11: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
12: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
13: 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.
- 20
- 15
- 10
- 25
14: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Aluminum
- Copper
- Magnesium
15: What refrigerant doesn't have to be classified?
- R-718
- R-422A
- R-717
- R-134A
16: Ammonia is under what safety classification?
- A3
- B2
- B1
- B3
17: 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
18: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Glove valve
- Gate valve
- Rupture disk
19: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 18
- 24
20: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
21: NH3 is
- ammonia
- R-508A
- lithium bromide
- R-718
22: Which occupancy can ammonia be used in?
- industrial
- redifential
- depends on the quantity of freon
- commercial
23: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- large mercantile occupancy
- mixed occupancy
24: Most CFC's are
- inert but toxic
- flammable
- toxic
- inert
25: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 90%
- 75%