Question 115Electricity & Electronics - 1st Asst/Chief

The correct answer is A) The generators are of the alternating current type running at constant frequency and delivering a constant voltage. This is the correct answer because modern silicon controlled rectified diesel-electric drive systems utilize alternating current (AC) generators that run at a constant frequency (e.g. 60 Hz) and deliver a constant voltage. This is necessary to power the propulsion motors which are also AC and require a stable input to operate efficiently. The generators are not direct current (DC) types, nor do they run at variable frequency or deliver variable voltage, which would be the characteristics of the other answer options.