In armature characteristic, nature of If at lower values of armature current is ______(a) Very large(b) Almost constant(c) Decreasing rapidly(d) Increasing then decreasingThis question was posed to me in a job interview.The doubt is from External and Armature Characteristics of DC Generator in division DC Generator of DC Machines

In armature characteristic, nature of If at lower values of armature c

1.	In armature characteristic, nature of If at lower values of armature current is ______(a) Very large(b) Almost constant(c) Decreasing rapidly(d) Increasing then decreasingThis question was posed to me in a job interview.The doubt is from External and Armature Characteristics of DC Generator in division DC Generator of DC Machines
Answer» The CORRECT option is (b) Almost constant The explanation: It is seen from the CHARACTERISTIC that at low values of Ia, the INCREASE in If is very SMALL to provide for increasing Ia *Ra drop. At large values of Ia there is a sharp increase in If to compensate for voltage drop caused by ARMATURE reaction.

Discussion

No Comment Found

Related InterviewSolutions

External Characteristic is a plot of _____________(a) Generated emf and load current(b) Terminal voltage and load current(c) Generated voltage and field current(d) Armature current and field currentI have been asked this question in final exam.My enquiry is from External and Armature Characteristics of DC Generator topic in chapter DC Generator of DC Machines
Which of the following is the correct formula for cumulative compound generator?(a) Nse= Nf (ΔIa/If)(b) Nse= Nf (ΔIf/Ia)(c) Nse= 2Nf (ΔIa/If)(d) Nse= Nf (ΔIa/If)/2The question was posed to me during an online interview.I'm obligated to ask this question of External and Armature Characteristics of DC Generator in section DC Generator of DC Machines
When two DC series motors are connected in parallel, the resultant speed is __________(a) More than the normal speed(b) Loss than the normal speed(c) Normal speed(d) ZeroI have been asked this question in class test.This is a very interesting question from Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines
While running two compound motors in parallel, we connect equalizer ring between ___________(a) Two armatures(b) Two fields(c) Two load points(d) AnywhereI have been asked this question in an interview for internship.The above asked question is from Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines
When two compound generators are connected in parallel, when load current in generator 1 is increased __________(a) Both generator will share same load(b) Generator 1 will start running as motor(c) Generator 2 will be overloaded(d) Generator 2 will start running as motorI got this question in homework.Asked question is from Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines
Load sharing of two generators connected in parallel is determined by __________(a) Internal characteristics(b) External characteristics(c) Both internal and external characteristics(d) It doesn’t depend on load sharingI had been asked this question during an interview for a job.Origin of the question is Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines
For a parallel operation of 2 DC shunt generators, we get net external characteristics ___________(a) Starting from the same no-load point and between generator 1 and generator 2(b) Starting from the same no-load point and below generator 1 and generator 2(c) Starting from the same no-load point and above generator 1 and generator 2(d) Can’t be determinedThis question was posed to me in an interview for job.I'm obligated to ask this question of Parallel Operation of DC Generator topic in division DC Generator of DC Machines
We connect two generators in parallel _____________(a) For large DC load(b) For small DC load(c) For any DC load(d) For any AC or DC loadI got this question in class test.The query is from Parallel Operation of DC Generator in portion DC Generator of DC Machines
While connecting two DC generators in parallel, which of the following is not a desirable condition?(a) Same voltage rating(b) Same percentage voltage regulation(c) Same percentage speed regulation of the prime movers(d) Same current ratingI had been asked this question in an internship interview.My enquiry is from Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines
For a given compound DC machine, Net field current obtained from characteristic is equal to 7.5 A, where shunt field current is equal to 5 A, armature current is 505 A, demagnetizing current equal to 0.95 A and shunt field winding of 1000 turns at rated speed of 1000 rpm. What will be the series field turns?(a) 7(b) 8(c) 5(d) 9I got this question during an internship interview.The above asked question is from Graphical Representation of External Characteristics in section DC Generator of DC Machines

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment