The main factor which leads to unstable parallel operation of flat and over compounded generators is_____________?
Correct answer: A. their rising voltage characteristics
- A. their rising voltage characteristics
- B. unequal number of turns in their series field windings
- C. unequal speed regulation of their primemovers
- D. unequal series field resistances
Explanation
Flat and over-compounded generators have voltage characteristics that do not share load stably, particularly because the over-compounded unit has a rising terminal voltage with load. Such rising characteristics can cause one machine to take progressively more load.
Last updated
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
5 H.P., 50-Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest ?
A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be_____________?
A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be____________?
A 3-phase induction motor delta connected is carrying too heavy load and one of its fuses blows out. Then the motor______________?
A 3-phase induction motor stator delta connected, is carrying full load and one of its fuses blows out. Then the motor_______________?