Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
the atmosphere
a de-pressurized recovery tank with a silver top and yellow bottom
a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
All of the above
2: How many refrigerant classifications are there for toxicity?
3
1
2
5
3: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
4: What must be done to refrigerant pipes before being buried ?(8.10.4)
Leak checked
Insulated and installed in a pipe duct (Encased)
Classifed
Certified
5: R-717 is
trichloromethane
water
carbon dioxide
ammonia
6: Ammonia (NH3) is a group III refrigerant
True
False
7: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
8: Institutional occupancy is
a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
None of the above
9: Which refrigerant class listed below is the most flammable?
B-2
A-3
C-3
A-1
10: What type refrigerant is NOT ozone depleting?
Halon
HFC
HCFC
CFC
11: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
30 days
2 months
1 week
14 days
12: 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
24 volt secondary side of the Class 2 transformer to the thermostat
load-side of the contactor in
breaker panel in
first disconnect in
13: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
commercial occupancy
public assembly occupancy
institutional occupancy
illegal occupancy
14: What type of relief valve is used on a CO2 system?
glove disc
gate valve
fusible plug
rupture disc
15: The Board of Boilers adopts by reference
the MACS Pressure Vessel Code of Massachusetts
the 1997 ANSI/ASHRAE Safety Code
Montreal Protocol Safety Code
MSCA Code
16: Trichlorofluoromethane is the name of what refrigerant?
R-12
R-502
R-113
R-11
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: Name a CFC refrigerant(s):
R-11
R-12
R-123
both a & b
19: 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
20: Class 3 refrigerants are
non-toxic
highly flammable
non-flammable
toxic
21: _____ and its alloys are suitable for use with ammonia systems.
Copper
Aluminum
Magnesium
Zinc
22: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Stop valve
Foot valve
Moisture indicator
Muffler
23: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
100%
75%
90%
80%
24: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
110
90
100
80
25: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.