Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: A High-Probability System
is such that a leak of refrigerant from a failed connection will enter the occupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
is such that a leak of refrigerant from a failed connection will enter an unoccupied space
is a system highly likely to leak form a failed connection or component of such system
2: What would be the classification of a church?
Institutional
Industrial
Large mercantile
Place of assembly
3: Halo-carbon refrigerants cannot be used with what material?
Magnesium alloy
Copper
Stainless Steel
Aluminum
4: Halogenated refrigerants cannot be used with what material?
Magnesium alloy
Stainless steel
Copper
Aluminum
5: When should a relief valve start to function?
Before the purge station discharges
Two times it's working pressure
At it's set pressure
10 psi before it's set pressure
6: 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
55
50
15
7: Defined process piping by code CMR (528)
Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
Any piping in an industrial space
Any piping in an industrial or commercial space
All of the above
8: Fusible plugs shall not be used with pressure vessels of
3 cubic feet or less
15 square feet or less
3 cubic feet or more
15 cubic feet or more
9: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
90%
80%
99%
75%
10: 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 R-11
Flush with ammonia
Flush with RX-11
11: 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
12: Refrigerant restricted in 2004 but used for transition for decades:
R-11
R-22
R-134A
R-123
13: 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.
100
80
110
90
14: What does safe access mean?
OSHA approved
Well-lit exit signs
Locked doors
A clear unobstructed path to the equipment and controls
15: What refrigerant were phased out in 2004?
R-134a
R-12
R-22
R-11
16: 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
17: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
18: What pipe can not be used for refrigeration?
M
N
K
L
19: 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
Inspector leaves a metal tag with a certification listed on it
There is a temporary shut-down until a final inspection can be performed.
20: 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
21: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection
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 and a rupture disc
22: A professional or office building would be considered what type of occupancy?
business
mercantile
commercial
public assembly
23: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
ammonia
HCFC-123
Lithium bromide
CFC-11
24: Single compound Refrigerants are classified by what two criteria?
Weight and color
Flammability and temperature range
Temperature range and hazardousness
Flammability and toxicity
25: What must be done to all doors and access points in duct work going through a mechanical room?