Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
low pressure
design pressure
high pressure
critical pressure
2: Can ammonia be used on domestic system?
no, unless there is proper ventilation system installed
no
yes
yes, for systems under 10 tons
3: A relief valve shall be located at least ___ above grade.
10'
15'
25'
36'
4: Large mercantile occupancy is
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 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 or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
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
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: How many different groups of refrigerants are there?
3
7
11
15
7: How much refrigerant can be stored in a mechanical room outside of the system?
150
100
330
200
8: Which occupancy can ammonia be used in?
industrial
redifential
depends on the quantity of freon
commercial
9: Where must a refrigeration contractor's license number be displayed?
Uniforms, checks, and invoices.
Truck, office, every job, and on all equipment
Trucks, invoices, and advertising
Trucks, license plates, and uniforms
10: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
District Engineering Inspectors
Commissioned Inspectors
Master licensed Technician
both a or b
11: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
12: What must be done to all doors and access points in duct work going through a mechanical room?
Must be hindged
Must be screwed shut
Must be sealed and gasketed
All of the above
13: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
10
24
15
18
14: How many gallons of water do you need per pound of ammonia?
100
50
1
10
15: Pressure vessels with an internal volume of 3 cubic feet or less
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
shall use pressure relief devices
shall use fusible plugs
16: The main purpose of a refrigerant detector in a machinery room is to
inform there is a refrigerant leak int he system
detect toxins in the air caused by a refrigerant leak
to set off an alarm when there is refrigerant present inside the room
all of the above
17: What is the minimum height refrigeration piping should be placed against walls?
72"
Ceiling height
6'
7.25'
18: Ammonia is under what safety classification?
B3
B2
B1
A3
19: Pressure relief valves shall be marked with the data from
Section VIII Division of the ASME Boiler & Pressure Code
Section XIII 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
20: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
21: How many flammability classifications are refrigerants in?
7
5
3
2
22: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
2.5, 3.0
6.6, 6.6
3.0, 3.5
2.5, 2.5
23: Dual-pressure relief devices should be installed on
vessels of 10 cubic feet or more
vessels of 3 cubic feet or less
vessels of 3 cubic feet or more
vessels of 10 cubic feet or less
24: Stop valves shall not be permitted between the system and the