Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
2: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection and a rupture disc
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
over pressure protection as well as a temperature protection device
over pressure protection
3: Dual-pressure relief devices should be installed on
vessels of 10 cubic feet or less
vessels of 3 cubic feet or more
vessels of 3 cubic feet or less
vessels of 10 cubic feet or more
4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UM or UL
UL and UR
UV or UR
UL and UM
5: Which refrigerant class listed below is the most flammable?
C3
B2
A3
A2
6: How many refrigerant classifications are there for flammability?
1
7
3
2
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class A machinery room
Class B machinery room
Class T machinery room
Class M machinery room
8: 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
9: Refrigerants shall be classified by
requirements for commercial, industrial, and residential occupancies
toxicity and flammability
color codes
maximum permissible quantities of each group
10: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
33
50
18
22
11: R-12. R-22, and R-40 are considered Group I refrigerants.
True
False
12: Systems containing more than 110 pounds must have stop valves located at the
compressor suction inlet
compressor discharge outlet
receiver inlet and outlet
All of the above
13: What type of relief valve is used on a CO2 system?
rupture disc
fusible plug
gate valve
glove disc
14: 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-11
Flush with ammonia
Flush with R-718
Flush with RX-11
15: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
16: Evaporators within 18" of a heating coil must be equipped with a
low limit control
pressure relief device
zone valve
high limit control
17: 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
18: What happens after your initial inspection of a pressure vessel?
Notify the AHJ to let them know that the system been inspected
Notify the Fire Marshal that the system has been inspected and approved
There is a temporary shut-down until a final inspection can be performed.
Inspector leaves a metal tag with a certification listed on it
19: Halogenated refrigerants cannot be used with what material?
Magnesium alloy
Stainless steel
Aluminum
Copper
20: Single compound Refrigerants are classified by what two criteria?
Temperature range and hazardousness
Flammability and toxicity
Weight and color
Flammability and temperature range
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
22: 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.
400
350
100
250
23: Fusible plugs shall not be used with pressure vessels of
15 cubic feet or more
3 cubic feet or more
15 square feet or less
3 cubic feet or less
24: Where must a refrigeration contractor's license number be displayed?
Uniforms, checks, and invoices.
Trucks, license plates, and uniforms
Truck, office, every job, and on all equipment
Trucks, invoices, and advertising
25: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.