IC Engine - Internal Combustion Engine.
Idle - Internal combustion engine operating at no load and minimum engine speed.
Ignition Timing - The time of occurrence of ignition measured in degrees of crankshaft rotation relative to TDC (Top Dead
Center).
Imbalance - Unequal radial weight distribution on a rotor system.
IMAP - Internet Message Access Protocol. A system used to retrieve mail, where the mail resides on the server instead of the
client application.
IMEP - During the cycle of an engine useful work is only done on the power stroke.
Impact Test - A test to determine the behavior of materials when subjected to high rates of loading, usually in bending,
tension or torsion.
Impeller - A device that imparts motion to a fluid.
Implosion - A violent inward collapse.
Independent Chuck - A chuck in which each jaw may be moved independently of the others.
Independent Power Producer - A producer of electricity that is not regulated as a utility by state or federal authority.
Indicated Mean Effective Pressure - During the cycle of an engine useful work is only done on the power stroke.
Indicator Diagram - A plot of pressure vs. volume.
Induction Brazing - Bonding is produced by the heat obtained from the resistance of the work to the flow of induced electric
current and by using a nonferrous filler metal.
Induction Hardening - Quench hardening in which the heat is generated by electrical induction.
Inert Gas - A gas which does not normally combine chemically with other elements.
Influent The fluid entering a system, process, tank, etc.
Ingot - A steel casting that is cast into a mould which when solidified will be rolled in a blooming mill to plates and slabs for
sheets.
Inner Dead Center - Also known as top dead centre.
Inside Caliper - An instrument used to measure the inside dimension of an object.
Incident Light - Light that shines onto the face of a solar cell or module.
Instant Glue - More formally known as Cyanoacrylate.
Insulator - A material that does not allow the passage of electric charge or is a poor conductor of thermal energy.
Internal Combustion Engine - Any engine, either reciprocating or rotary, in which the fuel is consumed in the interior of the
engine rather than outside of the engine.
Internal Force - Forces which hold an object together when external forces or other loads are applied.
Interrupted Quenching - Quenching in which the metal object being quenched is removed from the quenching medium while
the object is at a temperature substantially higher than that of the quenching medium.
Invector - Dry scrubbing clean up of flue gases and absorbtion of free oil
Investment Casting - Also known as lost wax and precision casting, it is based on the use of a mould that is only used once.
Ion exchange - An adsorption process in which one ion is exchanged for another ion of like charge. There is an equivalence
of exchanged charge.
Iron Foundry - A place where iron castings are made.
Isomers - Two or more different compounds with the same chemical formula but different structure and characteristics.
ISO Metric Threads - Table of ISO Metric Thread standards.
Isothermal Annealing - Austenitizing a ferrous alloy and then cooling to and holding at a temperature at which austenite
transforms to a relatively soft ferrite carbide aggregate.
Isothermal Transformation - A change in phase at any constant temperature.
Izod Test - A pendulum type of single-blow impact test in which the specimen, usually notched, is fixed at one end and
broken by a falling pendulum.
Idle - Internal combustion engine operating at no load and minimum engine speed.
Ignition Timing - The time of occurrence of ignition measured in degrees of crankshaft rotation relative to TDC (Top Dead
Center).
Imbalance - Unequal radial weight distribution on a rotor system.
IMAP - Internet Message Access Protocol. A system used to retrieve mail, where the mail resides on the server instead of the
client application.
IMEP - During the cycle of an engine useful work is only done on the power stroke.
Impact Test - A test to determine the behavior of materials when subjected to high rates of loading, usually in bending,
tension or torsion.
Impeller - A device that imparts motion to a fluid.
Implosion - A violent inward collapse.
Independent Chuck - A chuck in which each jaw may be moved independently of the others.
Independent Power Producer - A producer of electricity that is not regulated as a utility by state or federal authority.
Indicated Mean Effective Pressure - During the cycle of an engine useful work is only done on the power stroke.
Indicator Diagram - A plot of pressure vs. volume.
Induction Brazing - Bonding is produced by the heat obtained from the resistance of the work to the flow of induced electric
current and by using a nonferrous filler metal.
Induction Hardening - Quench hardening in which the heat is generated by electrical induction.
Inert Gas - A gas which does not normally combine chemically with other elements.
Influent The fluid entering a system, process, tank, etc.
Ingot - A steel casting that is cast into a mould which when solidified will be rolled in a blooming mill to plates and slabs for
sheets.
Inner Dead Center - Also known as top dead centre.
Inside Caliper - An instrument used to measure the inside dimension of an object.
Incident Light - Light that shines onto the face of a solar cell or module.
Instant Glue - More formally known as Cyanoacrylate.
Insulator - A material that does not allow the passage of electric charge or is a poor conductor of thermal energy.
Internal Combustion Engine - Any engine, either reciprocating or rotary, in which the fuel is consumed in the interior of the
engine rather than outside of the engine.
Internal Force - Forces which hold an object together when external forces or other loads are applied.
Interrupted Quenching - Quenching in which the metal object being quenched is removed from the quenching medium while
the object is at a temperature substantially higher than that of the quenching medium.
Invector - Dry scrubbing clean up of flue gases and absorbtion of free oil
Investment Casting - Also known as lost wax and precision casting, it is based on the use of a mould that is only used once.
Ion exchange - An adsorption process in which one ion is exchanged for another ion of like charge. There is an equivalence
of exchanged charge.
Iron Foundry - A place where iron castings are made.
Isomers - Two or more different compounds with the same chemical formula but different structure and characteristics.
ISO Metric Threads - Table of ISO Metric Thread standards.
Isothermal Annealing - Austenitizing a ferrous alloy and then cooling to and holding at a temperature at which austenite
transforms to a relatively soft ferrite carbide aggregate.
Isothermal Transformation - A change in phase at any constant temperature.
Izod Test - A pendulum type of single-blow impact test in which the specimen, usually notched, is fixed at one end and
broken by a falling pendulum.
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Engineering Glossary, Engineering Dictionary I
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