Lesson 3

Interpret Technical Drawings and Plans

LEARNING OUTCOMES: At the end of this Lesson, you are expected to do the following:

Ampere (I) - the unit of electrical current (coulombs per second)
Caution - indicates some precautionary measures against potential hazardous situation which, if not avoided, may result to a minor or moderate injury
Danger - specifies hazardous situation which, if not avoided, will result to a serious injury or even death
Isometric - a kind of drawing which shows the object in 3 dimensional views
Joule (J) - a metric unit of energy: watt per second. 1 Kw hr = 2,655,000 ft-lb = 1.341 hp-hr = 3413 Btu = 3,600,000 joules
Kilovolt-ampere (KVA) - a measurement of apparent electric power
Kilowatt hour (Kwhr) - a unit of electrical energy or work performed Ohm - the unit of electrical resistance (volts/ampere) Orthographic - a drawing which shows the front top and side view of the object
Volt (E) - the unit of electric pressure or electromotive force which will produce a current of 1 ampere through a resistance of 1 ohm Watts (W) and kilowatts (KW) - are units of electric power