ETO ETO Exam papers 📅 Feb 2024

Exam Question

(a) What are the factors which determine the synchronous speed of a motor? (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) The synchronous speed of an AC motor is determined by two primary factors:
Supply Frequency (f)
Number of Poles (P)
The relationship between these factors and the synchronous speed (Ns) is given by the formula:

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