T2 Part 1 Flashcards
A transformer works on the principle of
Mutual inductance
The mechanism connecting the rotating windings in a dc motor is called :
The commutator
In a capacitor the term dielectric describes
The material between the
plates
In large industrial installations one of the reasons why discharge lighting
is divided over 3 phases is to overcome
The stroboscopic effect
Compact fluorescent lamps are much less expensive to operate then
filament lamps because :
Their efficiency is higher with a longer working
life
One of the factors that can influence the size of a cable conductor selected
for a particular application is
The length of run
Which of the following illustrates the stroboscopic effect :
Rotating machinery appears stationary
The first digit in the IP classification system for enclosures means :
The degree of protection against ingress of solid bodies
Which type of supply produces a sinusoidal waveform
A.C Generator
Conduit boxes are galvanised to
Prevent corrosion
The capacitance of a capacitor increases with
A larger plate area and less
distance between the plates
The type of rotor used in a three-phase induction motor is
A squirrel cage rotor
