1. The speed time curve for urban service locomotive has no
Answer : free running period
Explanation:-
2. Long distance railways operate on
Answer : 25kv three phase ac
Explanation:-
3. The machine having heavy fluctuations of load is
Answer : printing machine
Explanation:-
4. The best suited motor for rolling mills is
Answer : DC Cummulative compound motor
Explanation:-
5. PLC Stands for
Answer : Programmable logic controller
Explanation:-
6. The commutator segments of a dc machine are insulated from each other by a thin layer of
Answer : B. mica
Explanation:-
7. A 200V DC machine has an armature resistance of 0.02 ohms. The difference in the induced voltages when the machine is running as a motor and as a generator and carrying a full load current of 200A, is
Answer : B. 8 volts
Explanation:-
8. Negative voltage regulation is obtained in the following DC generator
Answer : A. flat compound generator
Explanation:-
9. In a 4-pole, 36 slot dc armature, the coil span of 180 electrical degrees will be obtained when the coil occupies
Answer : B. 1 and 10 slots
Explanation:-
10. The essential condition for stable parallel operation of two identical DC generators is that, they should have
Answer : A. same no-load and full-load speed
Explanation:-
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