Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: _____ alloys shall not be used in contact with an halogenated refrigerants.
Zinc
Magnesium
Nickel
Copper
2: How many gallons of water do you need per pound of ammonia?
50
100
10
1
3: A professional or office building would be considered what type of occupancy?
business
mercantile
commercial
public assembly
4: A declaration test is needed when the system contains more than
65 lbs
55 lbs
110 lbs
120 lbs
5: Who is permitted to access a refrigeration machine room?
Contractors only
Anyone, it's a completely safe area
Any employee
Authorized persons only
6: How many different groups of refrigerants are there?
3
11
7
15
7: 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
8: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Classifed
Leak checked
Insulated and installed in a pipe duct (Encased)
9: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
“UV”
“U” or “UM”
“UL”
“UM” and “UV”
10: The discharge relief valve is located (9.4.6)
on top of the condensor
between the compressor and reciever
between the compressor and the stop valve
between the compressor and oil separator
11: R-12. R-22, and R-40 are considered Group I refrigerants.
True
False
12: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
75
50
15
55
13: Pressure vessels with an internal volume of 3 cubic feet or more
shall use fusible plugs
do not need pressure relief protection
shall use pressure relief devices
shall use pressure relief devices or fusible plugs
14: NH3 is
R-508A
ammonia
R-718
lithium bromide
15: Fusible plugs shall not be used with pressure vessels of
3 cubic feet or more
3 cubic feet or less
15 cubic feet or more
15 square feet or less
16: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
18
50
22
33
17: The gauge thickness required on a CO2 tank construction is
3/32"
1/8"
1/16"
5/16"
18: Which refrigerant class listed below is the most flammable?
A-1
A-3
C-3
B-2
19: When air is ducted through a machine room that services occupied space, What must be done?
Ducted and sealed
Flanged and gasketed
Insulated and cross broke
Welded and seamed.
20: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
shall be prohibited
of Group B2 refrigerant shall be prohibited
shall not be prohibited
containing R-11, R-123 & R-717 exclusively shall not be prohibited
21: What type of material can't be used on the outlet of a relief valve?
Stainless steel
PVC
Magnesium alloy
Copper
22: What is the minimum height refrigeration piping should be placed against walls?
72"
Ceiling height
6'
7.25'
23: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
24: What section of ASHRAE-15 governs pressure vessels?
Section 6 ASHRAE-34 ASME VIII unfired
Section 9 ASHRAE-15 ASME VIII unfired
Section 7 ASHRAE-15 ASME VIII fired
OSHA
25: A room having machinery but no flame producing apparatus permanently installed and operated is considered a