A technician often has to sketch or design ductwork and the other parts of an HVAC system. Sometimes you have to sketch the room or building you are working with. This means working with lines, angles ...

In order to derive the formula to calculate the angle at the centre of the sector, the formulae for the arc length and area of a sector can be rearranged so that we can calculate the fraction of ...

The electrical industry has much to gain from incorporating arc-rated (AR), flame resistant (FR) garments to help mitigate the impacts of arc flash hazards. AR/FR daily wear balances the comfort and ...