Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
65 lbs
110 lbs
120 lbs
55 lbs
2: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
3: Ammonia belongs to Group
A-2
B-1
A-1
B-2
4: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
36
24
48
18
5: Halo-carbon refrigerants cannot be used with what material?
Aluminum
Magnesium alloy
Copper
Stainless Steel
6: A High-Probablity system
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
is such that a leak of refrigerant from failed connections will enter the occupied space
is such that a leak of refrigerant from failed connections will enter the unoccupied space
7: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1.2
2.2
1.5
1
8: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
the vapor side of the system
high side of the system
the liquid side of the system
low side of the system
9: Where are the three places that the discharge from an ammonia relief valve be piped?
atmosphere, tank containing water, where the A.H.J. indicates
underground, into drain, into mechanical room
to chemical neutralizing tank only
none of the above
10: The 522 CMR 9.00 has adopted for reference ASHRAE ____
10
15
III
25
11: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
20
75
50
15
12: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
22
50
18
33
13: 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
14: Pressure relief valves shall be marked with the data from
Section XIII Division of the ASME Boiler & Pressure Code
Section VIII Division of the ASME Boiler & Pressure Code
Section IV Division of the ASME Boiler & Pressure Code
Section I Division VIII of ASME Boiler & Pressure Code
15: A High-Probability System
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 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 a leak of refrigerant from a failed connection will enter the occupied space
16: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
you can never change refrigerants
Nothing must be done
Place sign, check for leaks, and insulate suction line
Make sure its compatible, notify owner, and notify AHJ.
17: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
shall be prohibited
containing R-11, R-123 & R-717 exclusively shall not be prohibited
of Group B2 refrigerant shall be prohibited
shall not be prohibited
18: 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
19: What is the refrigerant dichlorodifluoromethane?
R-123
R-12
R-22
R-134A
20: What refrigerant were phased out in 2004?
R-134a
R-11
R-12
R-22
21: A 3-cubic foot receiver must have what type of relief valve?
fusible plug
relief valve
rupture device
none of the above
22: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
2.5
5.5
3.0
2.0
23: _____ and its alloys are suitable for use with ammonia systems.
Magnesium
Zinc
Copper
Aluminum
24: 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.