OBJECTIVE TESTS – 281. The external characteristic of a shunt generatorcan be obtained directly from itscharacteristic.(a) shunt(b) series(c) short shunt7. If a self-excited d.c. generator after beinginstalled, fails to build up on its first trial run,the first thing to do is to(a) increase the field resistance(d) long shunt(a) internal(c) load-saturation (d) performance2. Load saturation characteristic of a d.c. genera-tor gives relation between(a) V and I(c) E, and I3. The slight curvature at the lower end of theO.C.C. of a self-excited d.c. generator is due(b) open-circuit(b) check armature insulation(b) E and Ia(d) Vand I(c) reverse field connections(d) increase the speed of prime mover.8. If residual magnetism of a shunt generator isdestroyed accidentally, it may be restored byconnecting its shunt fieldto(a) residual pole flux(b) high armature speed(c) magnetic inertia(d) high field circuit resistance.4. For the voltage built-up of a self-excited d.c.generator, which of the following is not anessential condition ?(a) to earth(b) to an a.c. source(b) in reverse(d) to a d.c. source.9. The three factors which cause decrease in theterminal voltage of a shunt generator are(a) There must be some residual flux(a) armature reactances(b) Field winding mmf must aid the residualflux(b) armature resistance(c) armature leakages(d) armature reaction(c) Total field circuit resistance must be lessthan the critical value(e) reduction in field current(d) Armature speed must be very high.5. The voltage build-up process of a d.c. genera-10. If field resistance of a d.c. shunt generator isincreased beyond its critical value, thetor is(b) delayed(d) infinite(a) difficult(c) cumulative6. Which of the following d.c. generator cannotbuild up on open-circuit ?generator(a) output voltage will exceed its name-platerating(b) will not build up

1) Open - circuit the external characteristics of a shunt generator can be obtained directly from…

The external characteristic of a shunt general can be obtained directly from its characteristic. (a) internal (c) load-saturation (d) performance Load saturation characteristic of a d.c. gener tor gives relation between (a) V and I. (c) E, and I The slight curvature at the lower end of t O.C.C. of a self-excited d.c. generator is di (b) open-circuit (b) E and I (d) Vand I to (a) residual pole flux (b) high armature speed (c) magnetic inertia (d) high field circuit resistance. For the voltage built-up of a self-excited d

The external characteristic of a shunt general can be obtained directly from its characteristic. (a) internal (c) load-saturation (d) performance Load saturation characteristic of a d.c. gener tor gives relation between (a) V and I. (c) E, and I The slight curvature at the lower end of t O.C.C. of a self-excited d.c. generator is di (b) open-circuit (b) E and I (d) Vand I to (a) residual pole flux (b) high armature speed (c) magnetic inertia (d) high field circuit resistance. For the voltage built-up of a self-excited d

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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