ETO ETO Exam papers 📅 Sep 2025

Exam Question

(a) Explain the significance of the root-mean-square value of an alternating current or voltage waveform. Define the form factor of such a wave form. (6)

(b) A total load of 8000 kW at 0.8 power factor is supplied by two alternators in parallel. One alternator supplies 6000kW at 0.9 power factor. Find the KVA rating of the other alternator and the power factor. (10)

Reference Answer

(a) answer will be here soon
(b) Total active load P = 8000kW;
Power factor = $\cos \phi$ = 0.8
so, $\phi$ = $\cos^{-1}$ 0.8 = 36.87°

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