D_C_ Generators — Part 2 MCQs with Explanations

Voltage remains constant irrespective of the load is the correct answer to “In case of a flat compounded generator”. This question is standard in competitive examination syllabi for D_C_ Generators.

All of the above is the correct answer to “The e.m.f. generated in a D.C. generator is directly proportional to”. This question is standard in competitive examination syllabi for D_C_ Generators.

About 2 V is the correct answer to “A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be”. This question is standard in competitive examination syllabi for D_C_ Generators.

Blv is the correct answer to “If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by”. This question is standard in competitive examination syllabi for D_C_ Generators.

Magnetic flux, direction of motion and the direction of e.m.f. induced is the correct answer to “Fleming's right-hand rule regarding direction of induced e.m.f., correlates”. This question is standard in competitive examination syllabi for D_C_ Generators.

To neutralize the cross-magnetizing effect of the armature reaction is the correct answer to “Compensating windings are used in D.C. generators”. This question is standard in competitive examination syllabi for D_C_ Generators.

Creating residual magnetism by a D.C. source is the correct answer to “Flashing the field of D.C. generator means”. This question is standard in competitive examination syllabi for D_C_ Generators.

Is always present is the correct answer to “In a separately excited generator supplying rated load the armature reaction:”. This question is standard in competitive examination syllabi for D_C_ Generators.

Field resistance less than the critical resistance is the correct answer to “If a D.C. generator fails to build up the probable cause could not be”. This question is standard in competitive examination syllabi for D_C_ Generators.

All above is the correct answer to “D.C. generators are connected to the bus-bars or disconnected from them only under the floating condition”. This question is standard in competitive examination syllabi for D_C_ Generators.

That generator takes large share of loads is the correct answer to “Two generators are running in parallel. One of the generators may run as motor for which of the following reasons”. This question is standard in competitive examination syllabi for D_C_ Generators.

To discharge all the above functions is the correct answer to “The function of pole shoes in the case of D.C. machine is”. This question is standard in competitive examination syllabi for D_C_ Generators.

Series fields of all generators should be either on positive side or negative side of the armature is the correct answer to “For the parallel operation of two or more D.C. compound generators, we should ensure that”. This question is standard in competitive examination syllabi for D_C_ Generators.

Wave winding is the correct answer to “For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f.”. This question is standard in competitive examination syllabi for D_C_ Generators.

armature is the correct answer to “In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called”. This question is standard in competitive examination syllabi for D_C_ Generators.

Armature is the correct answer to “In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilized is called”. This question is standard in competitive examination syllabi for D_C_ Generators.

All of the above is the correct answer to “The resistance of armature winding depends on”. This question is standard in competitive examination syllabi for D_C_ Generators.

Lap winding is the correct answer to “A D.C. welding generator has”. This question is standard in competitive examination syllabi for D_C_ Generators.

Load is the correct answer to “Iron losses in a D.C. machine are independent of variations in”. This question is standard in competitive examination syllabi for D_C_ Generators.

saturation of iron is the correct answer to “In a shunt generator the voltage build up is generally restricted by”. This question is standard in competitive examination syllabi for D_C_ Generators.

load current is the correct answer to “The series field of a short-shunt D.C. generator is excited by”. This question is standard in competitive examination syllabi for D_C_ Generators.

None of the above is the correct answer to “Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles”. This question is standard in competitive examination syllabi for D_C_ Generators.

2E is the correct answer to “The e.m.f. generated by a shunt wound D.C. generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be”. This question is standard in competitive examination syllabi for D_C_ Generators.

Difference of front and back pitches is the correct answer to “In the case of lap winding resultant pitch is”. This question is standard in competitive examination syllabi for D_C_ Generators.

Demagnetization of leading pole tip and magnetization of trailing pole tip is the correct answer to “Armature reaction in a generator results in”. This question is standard in competitive examination syllabi for D_C_ Generators.

Equalizing bus bars are used with parallel running of D.C. shunt generators is the correct answer to “Which of the following statement about D.C. generators is false”. This question is standard in competitive examination syllabi for D_C_ Generators.

Self-excited generator is the correct answer to “Following D.C. generator will be in a position to build up without any residual magnetism in the poles”. This question is standard in competitive examination syllabi for D_C_ Generators.

All of the above is the correct answer to “The following constitute short-circuit in the armature winding.”. This question is standard in competitive examination syllabi for D_C_ Generators.

all of the above is the correct answer to “In a D.C. generator the actual flux distribution depends upon”. This question is standard in competitive examination syllabi for D_C_ Generators.

Any of the above is the correct answer to “In D.C. generators, the cause of rapid brush wear may be”. This question is standard in competitive examination syllabi for D_C_ Generators.

Number of poles is 2 is the correct answer to “In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when”. This question is standard in competitive examination syllabi for D_C_ Generators.

Mica is harder than copper is the correct answer to “In a commutator”. This question is standard in competitive examination syllabi for D_C_ Generators.

External characteristic = magnetization characteristic ohmic drop armature reaction is the correct answer to “In a D.C. generator”. This question is standard in competitive examination syllabi for D_C_ Generators.

Greater than 150 V is the correct answer to “The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be”. This question is standard in competitive examination syllabi for D_C_ Generators.

580 V is the correct answer to “The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be”. This question is standard in competitive examination syllabi for D_C_ Generators.

Reluctance is the correct answer to “Permeance is the reciprocal of”. This question is standard in competitive examination syllabi for D_C_ Generators.

Field is the correct answer to “The critical resistance of the D.C. generator is the resistance of”. This question is standard in competitive examination syllabi for D_C_ Generators.

Lie under interpolar region is the correct answer to “In D.C. generators, the brushes on commutator remain in contact with conductors which”. This question is standard in competitive examination syllabi for D_C_ Generators.

There is no load on the generator is the correct answer to “In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when”. This question is standard in competitive examination syllabi for D_C_ Generators.

Has all above features is the correct answer to “A separately excited generator as compared to a self-excited generator”. This question is standard in competitive examination syllabi for D_C_ Generators.