Engineering Studies $(8080074)$

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QP

$4\mathrm{.}3$ Since transformers has no moving parts, it won't have some other types of losses. Name TWO of those losses.

$[10]$

QUESTION $5$: AC MACHINES

$5\mathrm{.}1$ A $525V,50Hz$ three phase induction motor has a synchronous speed of $1500$r$/$min$.$

Calculate the following:

$5\mathrm{.}1\mathrm{.}1$ The rotor speed if the induction motor is operating at a slip of $20\%$

$5\mathrm{.}1\mathrm{.}2$ The number of poles of the induction motor

$5\mathrm{.}2$ Show by means of a circuit diagram, a capacitor$-$start, induction$-$run singlephase induction motor.

QUESTION $6$: GENERATION AND SUPPLY OF AC POWER AND MEASURING INSTRUMENTS

$6\mathrm{.}1$ Artisans, Technicians and Engineers are working tirelessly to keep power stations up and running. Make use of FIGURE $1$ below to show how electricity is generated using a Coal$-$fired power station and answer the question that follow.