INTERNATIONAL RESIDENTIAL CODE
MECHANICAL CODE MASTER SET
EXAM QUESTIONS WITH CORRECT
ANSWERS
IMC/Residential
A domestic open-top broiler unit shall be provided with a minimum clearance of ______
between the hood and the underside of the combustible material or cabinets. -
ANSWER-1/4 inch
M1505.1
IMC/Residential
For a domestic open-top boiler unit, a minimum of ______ shall be maintained between
the cooking surface and combustible material or cabinet. - ANSWER-24 inches
M1505.1
IMC/Residential
Heating equipment connected to an above-ground duct system shall be designed to
limit discharge air temperature to a maximum of ______. - ANSWER-250* F
M1601.1.1 #1
IMC/Residential
When serving heating, cooling or ventilation equipment, above-ground factory-made
duct systems shall be constructed of materials classified as ______ . - ANSWER-Class
0 or Class 1
M1601.1.1 #2
IMC/Residential
A 16-inch exposed retangular duct that is a portion of an above-ground duct system
shall have a minimum equivalent galvanized sheet gage of ______ . - ANSWER-No. 26
Table M1601.1.1 (2)
IMC/Residential
Gypsum board may be used in the construction of a return air plenum in an above-
ground duct system, provided the maximum air temperature is ______ and the exposed
surfaces are not subject to condensation. - ANSWER-125* F
,M1601.1.1 #5
IMC/Residential
What is the maximum flame spread index permitted for materials used to construct
above-ground duct systems? - ANSWER-200
M1601.1.1 #6
IMC/Residential
Where used in an underground duct system, the maximum permitted duct temperature
for plastic ducts shall be ______ . - ANSWER-150* F
IMC/Residential
When protected by concrete, metal ducts installed in an underground duct system shall
be encased with a minimum thickness of ______ . - ANSWER-2 inches
M1601.1.2
IMC/Residential
Duct coverings and linings for factory-made ducts shall have a maximum flame spread
index of ______ and a maximum smake-developed index of ______ . - ANSWER-25,
50
M1601.3 #1
IMC/Residential
Factory-insulated flexible factory-made ducts shall be identified at a maximum intervals
of ______ with the name of the manufacturer, the thermal resistance R-value, the flame
spread index and the smoke-developed index. - ANSWER-3 feet
M1601.3 #3
IMC/Residential
Where vibration isolators are installed between mechanical equipment and metal ducts,
they shall have a maximum length of ______ . - ANSWER-10 inches
M1601.2.1
IMC/Residential
Where metal ducts are supported by 1/2 inch wide metal straps, the straps shall be
minimum ______ and located a maximum of ______ on center. - ANSWER-18-gage, 10
feet
M1601.4.3
, IMC/Residential
In an existing structure, an under-floor space used as a supply plenum shall be formed
by meterials having a maximum flame spread raiting of ______ . - ANSWER-200
M1601.5.2
IMC/Residential
Where the under-floor space is permitted to be used as a supply plenum, a duct shall
extend from the furnace supply outlet to a minimum of ______ inches below the
combustible framing. - ANSWER-6
M1601.5.3
IMC/Residential
Unless the discharge outlet is a minimum of ______ above the outside air inlet,outside
air for forced-air heating system shall be taken a minimum of ______ from an appliance
vent outlet, a vent opening from a plumbing drainage system, or the discharge outlet of
an exhaust fan. - ANSWER-3 feet, 10 feet
M1602.2 #1
IMC/Residential
Which one of the following spaces is acceptable as a source for return air for a forced-
air heating system?
sleeping room
bathroom
kitchen closet - ANSWER-sleeping room
M1602.2 #4
IMC/Residential
Outdoor air inlets for a return air system shall be covered with screens having a
minimum opening size of ______ and a maximum opening size of ______ . - ANSWER-
1/4 inch, 1/2 inch
M1602.3
IMC/Residential
Built-in or freestanding ranges shall have a minimum vertical clearance of ______
above the cooking top to an unprotected combustible construction. - ANSWER-30
inches
M1901.1
IMC/Residential
MECHANICAL CODE MASTER SET
EXAM QUESTIONS WITH CORRECT
ANSWERS
IMC/Residential
A domestic open-top broiler unit shall be provided with a minimum clearance of ______
between the hood and the underside of the combustible material or cabinets. -
ANSWER-1/4 inch
M1505.1
IMC/Residential
For a domestic open-top boiler unit, a minimum of ______ shall be maintained between
the cooking surface and combustible material or cabinet. - ANSWER-24 inches
M1505.1
IMC/Residential
Heating equipment connected to an above-ground duct system shall be designed to
limit discharge air temperature to a maximum of ______. - ANSWER-250* F
M1601.1.1 #1
IMC/Residential
When serving heating, cooling or ventilation equipment, above-ground factory-made
duct systems shall be constructed of materials classified as ______ . - ANSWER-Class
0 or Class 1
M1601.1.1 #2
IMC/Residential
A 16-inch exposed retangular duct that is a portion of an above-ground duct system
shall have a minimum equivalent galvanized sheet gage of ______ . - ANSWER-No. 26
Table M1601.1.1 (2)
IMC/Residential
Gypsum board may be used in the construction of a return air plenum in an above-
ground duct system, provided the maximum air temperature is ______ and the exposed
surfaces are not subject to condensation. - ANSWER-125* F
,M1601.1.1 #5
IMC/Residential
What is the maximum flame spread index permitted for materials used to construct
above-ground duct systems? - ANSWER-200
M1601.1.1 #6
IMC/Residential
Where used in an underground duct system, the maximum permitted duct temperature
for plastic ducts shall be ______ . - ANSWER-150* F
IMC/Residential
When protected by concrete, metal ducts installed in an underground duct system shall
be encased with a minimum thickness of ______ . - ANSWER-2 inches
M1601.1.2
IMC/Residential
Duct coverings and linings for factory-made ducts shall have a maximum flame spread
index of ______ and a maximum smake-developed index of ______ . - ANSWER-25,
50
M1601.3 #1
IMC/Residential
Factory-insulated flexible factory-made ducts shall be identified at a maximum intervals
of ______ with the name of the manufacturer, the thermal resistance R-value, the flame
spread index and the smoke-developed index. - ANSWER-3 feet
M1601.3 #3
IMC/Residential
Where vibration isolators are installed between mechanical equipment and metal ducts,
they shall have a maximum length of ______ . - ANSWER-10 inches
M1601.2.1
IMC/Residential
Where metal ducts are supported by 1/2 inch wide metal straps, the straps shall be
minimum ______ and located a maximum of ______ on center. - ANSWER-18-gage, 10
feet
M1601.4.3
, IMC/Residential
In an existing structure, an under-floor space used as a supply plenum shall be formed
by meterials having a maximum flame spread raiting of ______ . - ANSWER-200
M1601.5.2
IMC/Residential
Where the under-floor space is permitted to be used as a supply plenum, a duct shall
extend from the furnace supply outlet to a minimum of ______ inches below the
combustible framing. - ANSWER-6
M1601.5.3
IMC/Residential
Unless the discharge outlet is a minimum of ______ above the outside air inlet,outside
air for forced-air heating system shall be taken a minimum of ______ from an appliance
vent outlet, a vent opening from a plumbing drainage system, or the discharge outlet of
an exhaust fan. - ANSWER-3 feet, 10 feet
M1602.2 #1
IMC/Residential
Which one of the following spaces is acceptable as a source for return air for a forced-
air heating system?
sleeping room
bathroom
kitchen closet - ANSWER-sleeping room
M1602.2 #4
IMC/Residential
Outdoor air inlets for a return air system shall be covered with screens having a
minimum opening size of ______ and a maximum opening size of ______ . - ANSWER-
1/4 inch, 1/2 inch
M1602.3
IMC/Residential
Built-in or freestanding ranges shall have a minimum vertical clearance of ______
above the cooking top to an unprotected combustible construction. - ANSWER-30
inches
M1901.1
IMC/Residential
