International Mechanical Code Study Guide Exam Questions
With Accurate Answers
What is the clearance reduction above the appliance for a horizontal 24 gage
sheet metal connector over 1-inch glass fiber reinforced with wire on rear
face with vented airspace? - accurate answers-18 inches
[IFGC-T-308.4.2]
Working clearance of passageways around all sides of boilers shall have an
unobstructed width of not less than ____ inches. - accurate answers-18
[IMC-1004.3]
Safety or relief valves shall be installed directly into the safety or relief valve
opening on the boiler. The relief valve shall discharge _______ . - accurate
answers-by gravity
[IMC-1006.5]
Low-water cutoff controls and flow sensing controls shall automatically stop
the _____ of the appliance when the water level drops below the lowest safe
water level. - accurate answers-combustion operation
[IMC-1007.2]
You do not need a permit when you _____ a mechanical system. - accurate
answers-replace any minor part 106.1, IMC 2018 page 3
[IMC-106.1]
How much mechanical ventilation exhaust air is needed if you have a
refrigerant detector alarm in a Central Plant where you have one chiller with
775# of R-11 refrigerant and another chiller with 1225# of R-123 refrigerant?
- accurate answers-3500 cfm
[IMC-1105.6.3.2]
,Refrigerant piping that crosses an open space that affords passageway in any
building shall be not less than ____ above the floor unless the piping is located
against the ceiling of such space. - accurate answers-7 feet 3 inches
[IMC-1107.2]
The use of air as a Test Gas is allowed to test _______ , ammonia, systems
provided that they are subsequently evacuated before charging with
refrigerant. - accurate answers-R-717
[IMC-1108.2]
The IMC now ______ the use of PP (polypropylene) piping materials for
hydronic applications, using what method of conjoining joints? - accurate
answers-Heat Fusion
[IMC-1203.13]
A pipe in a hydronic pipe system in which the exterior temperature exceeds
_____ shall have a minimum clearance of 1 inch to combustible materials. -
accurate answers-250 degree F
[IMC-1206.5]
Hydronic piping systems shall be tested hydrostatically at one and one-half
times the maximum system design pressure, but not less than ______ . The
duration of each test shall be not less than 15 minutes. - accurate answers-100
psi
[IMC-1208.1]
The piping for a Fuel Oil system shall be sized where the minimum size of a
supply line shall be _____ inch inside diameter nominal pipe or _____ inch
outside diameter tubing. - accurate answers-3/8 and 3/8
[IMC-1305.1]
Flammable liquids that have a flash point below 73 degrees F. and a boiling
point at or above 100 degrees F. is known as: - accurate answers-Class 1B
, [IMC-202]
Low pressure steam boilers operate at pressure less than ___ pounds /sq. inch.
- accurate answers-15
[IMC-202]
One occupiable space or several occupiable spaces with similar occupancy
classification occupant density, air distribution effectiveness, and primary
airflow rate per unit area refers to?A.Zone 202 Definitions IMC 2018 page 19 -
accurate answers-Zone
[IMC-202]
"Piping" as used in the Mechanical Code refers to: - accurate answers-rigid
conduit of iron, steel, copper, brass or plastic
[IMC-202]
Soldered joints are made with metallic mixtures of alloys, which melt at
temperatures between ____ and ____ degrees F. - accurate answers-400 and
1000
[IMC-202]
In exterior walls and bearing partitions, any wood stud is permitted to be cut
or notched only if it does not exceed ___% of its depth. - accurate answers-25
[IMC-302.3.2]
An appliance in a pit location where the depth is 16 inch below grade, the
walls shall be lined with concrete or masonry which shall extend not less than
___ inches above adjoining grade. - accurate answers-4
[IMC-303.7]
Appliances installed at grade level shall be supported on a level concrete slab
or other approved material extending not less than _____ inches above
With Accurate Answers
What is the clearance reduction above the appliance for a horizontal 24 gage
sheet metal connector over 1-inch glass fiber reinforced with wire on rear
face with vented airspace? - accurate answers-18 inches
[IFGC-T-308.4.2]
Working clearance of passageways around all sides of boilers shall have an
unobstructed width of not less than ____ inches. - accurate answers-18
[IMC-1004.3]
Safety or relief valves shall be installed directly into the safety or relief valve
opening on the boiler. The relief valve shall discharge _______ . - accurate
answers-by gravity
[IMC-1006.5]
Low-water cutoff controls and flow sensing controls shall automatically stop
the _____ of the appliance when the water level drops below the lowest safe
water level. - accurate answers-combustion operation
[IMC-1007.2]
You do not need a permit when you _____ a mechanical system. - accurate
answers-replace any minor part 106.1, IMC 2018 page 3
[IMC-106.1]
How much mechanical ventilation exhaust air is needed if you have a
refrigerant detector alarm in a Central Plant where you have one chiller with
775# of R-11 refrigerant and another chiller with 1225# of R-123 refrigerant?
- accurate answers-3500 cfm
[IMC-1105.6.3.2]
,Refrigerant piping that crosses an open space that affords passageway in any
building shall be not less than ____ above the floor unless the piping is located
against the ceiling of such space. - accurate answers-7 feet 3 inches
[IMC-1107.2]
The use of air as a Test Gas is allowed to test _______ , ammonia, systems
provided that they are subsequently evacuated before charging with
refrigerant. - accurate answers-R-717
[IMC-1108.2]
The IMC now ______ the use of PP (polypropylene) piping materials for
hydronic applications, using what method of conjoining joints? - accurate
answers-Heat Fusion
[IMC-1203.13]
A pipe in a hydronic pipe system in which the exterior temperature exceeds
_____ shall have a minimum clearance of 1 inch to combustible materials. -
accurate answers-250 degree F
[IMC-1206.5]
Hydronic piping systems shall be tested hydrostatically at one and one-half
times the maximum system design pressure, but not less than ______ . The
duration of each test shall be not less than 15 minutes. - accurate answers-100
psi
[IMC-1208.1]
The piping for a Fuel Oil system shall be sized where the minimum size of a
supply line shall be _____ inch inside diameter nominal pipe or _____ inch
outside diameter tubing. - accurate answers-3/8 and 3/8
[IMC-1305.1]
Flammable liquids that have a flash point below 73 degrees F. and a boiling
point at or above 100 degrees F. is known as: - accurate answers-Class 1B
, [IMC-202]
Low pressure steam boilers operate at pressure less than ___ pounds /sq. inch.
- accurate answers-15
[IMC-202]
One occupiable space or several occupiable spaces with similar occupancy
classification occupant density, air distribution effectiveness, and primary
airflow rate per unit area refers to?A.Zone 202 Definitions IMC 2018 page 19 -
accurate answers-Zone
[IMC-202]
"Piping" as used in the Mechanical Code refers to: - accurate answers-rigid
conduit of iron, steel, copper, brass or plastic
[IMC-202]
Soldered joints are made with metallic mixtures of alloys, which melt at
temperatures between ____ and ____ degrees F. - accurate answers-400 and
1000
[IMC-202]
In exterior walls and bearing partitions, any wood stud is permitted to be cut
or notched only if it does not exceed ___% of its depth. - accurate answers-25
[IMC-302.3.2]
An appliance in a pit location where the depth is 16 inch below grade, the
walls shall be lined with concrete or masonry which shall extend not less than
___ inches above adjoining grade. - accurate answers-4
[IMC-303.7]
Appliances installed at grade level shall be supported on a level concrete slab
or other approved material extending not less than _____ inches above
