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Common terms and definitions

Basic Plumbing CEU Technical Learning College Course  PDF

Review of water distribution plumbing and related fundamentals.

This course will cover the basics of piping, valves, backflow prevention, water quality and hydraulic fundamentals.

Remote Electrical Grid Basics

Intro Vocabulary

ALTERNATOR - A device which converts mechanical energy into electrical energy.


ALTERNATING CURRENT (AC) - A flow of electrons which reverses its direction of flow at regul


AMPERE - A unit of measure for the flow of current in a circuit. One ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance. The ampere is used to measure electricity much as "gallons per minute" is used to measure water intervals in a conductor.


CURRENT - Movement of electricity along a conductor. Current is measured in amperes


DIRECT CURRENT (DC) - A steady flow of electrons moving steadily and continually in the same direction along a conductor from a point of high potential to one of lower potential. It is produced by a battery, generator, or rectifier. 

FUSE - A replaceable safety device for an electrical circuit. A fuse consists of a fine wire or a thin metal strip encased in glass or some fireresistant material. When an overload occurs in the circuit, the wire or metal strip melts, breaking the circuit. 


GENERATOR - A device which converts mechanical energy into electrical energy.


GROUND - A ground occurs when any part of a wiring circuit unintentionally touches a metallic part of the machine frame.


GROUNDED CIRCUIT - A connection of any electrical unit to the frame, engine, or any part of the tractor or machine, completing the electrical circuit to its source. 


OHM - The standard unit for measuring resistance to flow of an electrical current. Every electrical
conductor offers resistance to the flow of current, just as a tube through which water flows offers resistance to the current of water. One ohm is the amount of resistance that limits current flow to one ampere in a circuit with one volt of electrical pressure. 


PARALLEL CIRCUIT - A circuit in which the circuit components are arranged in branches so that there is a separate path to each unit along which electrical current can flow. 


TRANSFORMER - A device made of two coil windings that transfers voltage from one coil to the next through electromagnetic induction. Depending upon the number of windings per coil, a transformer can be designed to step - up or step - down its output voltage from its input voltage. Transformers can only function with alternating current (AC).


VOLT - A unit of electrical pressure (or electromotive force) which causes current to flow in a circuit. One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.


VOLTAGE - That force which is generated to cause current to flow in an electrical circuit. It is also referred to as electromotive force or electrical potential. Voltage is measured in volts. 


WATT - A unit of measure for indicating the electrical power applied in a circuit. It is obtained by multiplying the current (in amperes) by the electrical pressure (in volts) which cause it to flow. That is: watts = amperes x volts.

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