Question 115Electricity/Electronics - 1st Asst/Chief70% to pass
On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?
AI Explanation
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.
Related Questions
#113 Upon loss of field excitation of a generator operating in parallel with others, what must be done? #114 When a self-excited DC generator's field has lost its residual magnetism due to a prolonged idle period, it will fail to produce a voltage. Flashing the field is the procedure used to restore the residual magnetism. Using a 12 volt storage battery, how is this performed? #116 On an older two-generator, two-motor DC diesel-electric drive system as shown in the illustration, what are the characteristics of the main propulsion generators? Illustration EL-0141 #117 How is speed control of a DC propulsion motor accomplished? #118 On DC diesel-electric drives, how is the speed of the DC propulsion motor primarily controlled?