Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Who approves containers for refrigerants?
D.O.T
D.O.E
E.P.A
D.O.D
2: Which refrigerant class listed below is the most flammable?
A3
B2
A2
C3
3: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
50
550
350
100
4: When an inspection is needed, how often must it be done?
annually
every 18 months
every 24 months
every 36 months
5: Industrial occupancy is
a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
Both a and b are correct
6: Ammonia (NH3) is a group III refrigerant
True
False
7: What was the main reason for enacting the no venting rule of July 1, 1992?
Ozone depletion
Green house effect
Global warming potential
All of the above
8: What refrigerant were phased out in 2004?
R-12
R-134a
R-11
R-22
9: What is a Category "M" fluid?
Any fluid that exceeds 150 psig and has design temperatures over 366F
A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
A typical refrigerant used on newer air conditioning and heat pump systems
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
10: What would be the classification of a prison?
Large mercantile
Institutional
Industrial
Place of assembly
11: What is an example of institutional occupancy?
Hospital
Football stadium
Dorms
Shopping mall
12: What is the minimum height refrigeration piping should be placed against walls?
6'
Ceiling height
72"
7.25'
13: Pressure vessels with an internal volume of 10 cubic feet or more
shall use pressure relief devices or fusible plugs
shall use pressure relief devices
shall use rupture discs or duel pressure relief valves
shall use fusible plugs
14: Methyl Chloride is a halogenated refrigerant and should not come in contact with
aluminum
zinc
magnesium
all of the above
15: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
14 days
2 months
1 week
30 days
16: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
75%
100%
90%
80%
17: Pressure vessels of 10 cubic feet or more gross volume shall use
at least one rupture member
a dual pressure-relief valve if charging into the atmosphere
at least three means of discharge and/or rupture discs
both a and b are correct
18: What is not a requirement of a class T machine room?
tight fitting doors
fire hose connection to the building fire protection system
automatic ventilation
self-closing doors
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
Leak checked
Certified
Classifed
Insulated and installed in a pipe duct (Encased)
20: All serviceable components of a refrigeration system shall be provided with
service manuals
name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
safe access
manufactures instructions on start-up procedures
21: R-11 belongs to Group
A-2
B-1
A-1
B-3
22: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
3.0
2.0
5.5
2.5
23: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
fusible plug
relief valve
rupture disc
all of the above
24: _____ alloys shall not be used in contact with an halogenated refrigerants.
Copper
Zinc
Magnesium
Nickel
25: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.