Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What is Trichlorotrifluoromethane?
R-113
R-13
R-11
R-12
2: What type of copper is not permitted on refrigeration systems?
Type N
Type K
Type M
Type L
3: 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
4: A relief valve shall be located at least ___ above grade.
25'
10'
15'
36'
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: Pressure vessels with an internal volume of 3 cubic feet or less
shall use pressure relief devices or fusible plugs
shall use fusible plugs
shall use pressure relief devices
do not need pressure relief protection
7: 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
8: R-22 falls under which safety classification?
A-1
B-1
B-2
A-2
9: 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.
100
400
250
350
10: A pressure relief should be located at least _______ from windows and doors.
30'
20'
15'
25'
11: Ammonia belongs to Group
A-1
A-2
B-1
B-2
12: What type of relief valve is used on low pressure centrifugal compressor systems?
Spring-loaded relief valve
Rupture disc
Purge relief
None of the above
13: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
1,000
330
6.6
110
14: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
75%
80%
90%
100%
15: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class B machinery room
Class M machinery room
Class A machinery room
Class T machinery room
16: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
17: How many refrigerant classifications are there for toxicity?
2
3
5
1
18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
first disconnect in
breaker panel in
load-side of the contactor in
24 volt secondary side of the Class 2 transformer to the thermostat
19: Large mercantile occupancy is
a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
20: Refrigerants shall be classified by
requirements for commercial, industrial, and residential occupancies
color codes
toxicity and flammability
maximum permissible quantities of each group
21: What would be the classification of a church?
Industrial
Institutional
Place of assembly
Large mercantile
22: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
make sure it's compatible, notify owner, notify A.H.J
nothing must be done
you can't change refrigerants
place sign, check for leaks, insulate
23: What type refrigerant is NOT ozone depleting?
CFC
HFC
HCFC
Halon
24: 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
15
50
55
25: What type of pressure relief device is used on a CO2 system?