menu search
person
thumb_up_alt 0 like thumb_down_alt 0 dislike
70 views

1 Answer

In case of a flat compounded generator voltage remains constant irrespective of the load.

thumb_up_alt 0 like thumb_down_alt 0 dislike
← Prev Question Next Question →

Related questions

Description :

Answer :

In a level compounded D.C. generator, full load terminal voltage is equal to no-load terminal voltage.

thumb_up_alt 0 like thumb_down_alt 0 dislike
90 views 1 answer
Description :

Answer :

In over compounded generator, full load terminal voltage is more than no load terminal voltage.

thumb_up_alt 0 like thumb_down_alt 0 dislike
66 views 1 answer
Description :

Answer :

A cumulatively compounded long shunt generator when operating as a motor would be differentially compounded long shunt.

thumb_up_alt 0 like thumb_down_alt 0 dislike
85 views 1 answer
Description :

Answer :

In the case of lap winding resultant pitch is difference of front and back pitches.

thumb_up_alt 0 like thumb_down_alt 0 dislike
99 views 1 answer
Description :

Answer :

In a D.C. generator in case the resistance of the field winding is increased, then output voltage will decrease.

thumb_up_alt 0 like thumb_down_alt 0 dislike
171 views 1 answer
Description :

Answer :

In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be 8.

thumb_up_alt 0 like thumb_down_alt 0 dislike
144 views 1 answer
Description :

Answer :

Armature reaction in a generator results in demagnetisation of leading pole tip and magnetisation of trailing pole tip.

thumb_up_alt 0 like thumb_down_alt 0 dislike
90 views 1 answer
Description :

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?

Answer :

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be zero.

thumb_up_alt 0 like thumb_down_alt 0 dislike
221 views 1 answer
Description :

Answer :

In a separately excited generator supplying rated load the armature reaction is always present.

thumb_up_alt 0 like thumb_down_alt 0 dislike
100 views 1 answer
Description :

Answer :

In a D.C. generator, the critical resistance refers to the resistance of field.

thumb_up_alt 0 like thumb_down_alt 0 dislike
96 views 1 answer
Description :

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?

Answer :

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 580 V.

thumb_up_alt 0 like thumb_down_alt 0 dislike
411 views 1 answer
thumb_up_alt 0 like thumb_down_alt 0 dislike
136 views 0 answers
Description :

Answer :

The purpose of providing dummy coils in a generator is to provide mechanical balance for the rotor.

thumb_up_alt 0 like thumb_down_alt 0 dislike
268 views 1 answer
Description :

Answer :

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when there is no load on|he generator.

thumb_up_alt 0 like thumb_down_alt 0 dislike
155 views 1 answer
Description :

Answer :

The e.m.f. generated in a D.C. generator is directly proportional to speed of armature.

thumb_up_alt 0 like thumb_down_alt 0 dislike
373 views 1 answer
Description :

Answer :

In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when number of poles is 2.

thumb_up_alt 0 like thumb_down_alt 0 dislike
626 views 1 answer
thumb_up_alt 0 like thumb_down_alt 0 dislike
81 views 0 answers
Description :

Answer :

In a D.C. generator the ripples in the direct e.m.f. generated are reduced by using carbon brushes of superior quality.

thumb_up_alt 0 like thumb_down_alt 0 dislike
139 views 1 answer
Description :

Answer :

Magnetic field in a D.C. generator is produced by electromagnets.

thumb_up_alt 0 like thumb_down_alt 0 dislike
129 views 1 answer
Description :

Answer :

The demagnetising component of armature reaction in a D.C. generator reduces generator e.m.f.

thumb_up_alt 0 like thumb_down_alt 0 dislike
81 views 1 answer
Description :

Answer :

If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be crossmagnetisation as well as demagnetising.

thumb_up_alt 0 like thumb_down_alt 0 dislike
103 views 1 answer
Description :

Answer :

In a D.C. generator, the iron losses mainly take place in armature rotor.

thumb_up_alt 0 like thumb_down_alt 0 dislike
246 views 1 answer
Description :

Answer :

The total losses in a well designed D.C. generator of 10 kW will be nearly 500 W.

thumb_up_alt 0 like thumb_down_alt 0 dislike
104 views 1 answer
Description :

Auto reclosing is used in case of

Answer :

Auto reclosing is used in case of air blast C.B.

thumb_up_alt 0 like thumb_down_alt 0 dislike
79 views 1 answer
Description :

In the case of direct current?

Answer :

In the case of direct current magnitude and direction of current remains constant.

thumb_up_alt 0 like thumb_down_alt 0 dislike
58 views 1 answer
Description :

Answer :

In case of steam engines the steam pressure is 10 to 15 kgf/cm2.

thumb_up_alt 0 like thumb_down_alt 0 dislike
68 views 1 answer
Description :

Answer :

In case of locomotives the tractive power is provided by double cylinder, double acting steam engine.

thumb_up_alt 0 like thumb_down_alt 0 dislike
63 views 1 answer
Description :

Answer :

Depreciation charges are high in case of thermal plant.

thumb_up_alt 0 like thumb_down_alt 0 dislike
100 views 1 answer
Description :

Answer :

A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be about 2 V.

thumb_up_alt 0 like thumb_down_alt 0 dislike
340 views 1 answer
Description :

Answer :

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.

thumb_up_alt 0 like thumb_down_alt 0 dislike
140 views 1 answer
Description :

Answer :

An exciter for a turbo generator is a shunt generator.

thumb_up_alt 0 like thumb_down_alt 0 dislike
127 views 1 answer
Description :

Answer :

A D.C. generator can be considered as rotating amplifier.

thumb_up_alt 0 like thumb_down_alt 0 dislike
64 views 1 answer
Description :

Answer :

If a D.C. generator fails to build up the probable cause could not be field resistance less than the critical resistance.

thumb_up_alt 0 like thumb_down_alt 0 dislike
75 views 1 answer
Description :

A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly?

Answer :

A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly 240 V.

thumb_up_alt 0 like thumb_down_alt 0 dislike
1.4k views 1 answer
Description :

Answer :

The armature core of a D.C. generator is usually made of silicon steel.

thumb_up_alt 0 like thumb_down_alt 0 dislike
93 views 1 answer
Description :

Answer :

A separately excited generator as compared to a self-excited generator is amenable to better voltage control, more stable, has exciting current independent of load current.

thumb_up_alt 0 like thumb_down_alt 0 dislike
85 views 1 answer
Description :

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. ?

Answer :

Wave winding

thumb_up_alt 0 like thumb_down_alt 0 dislike
96 views 1 answer
Description :

Answer :

The condition for maximum efficiency for a D.C. generator is variable losses equal to constant losses.

thumb_up_alt 0 like thumb_down_alt 0 dislike
170 views 1 answer
Description :

Write down the method used for following product : (i) credit card (ii) carrying case (iii) hollow cylinder (iv) knobs

Answer :

i) Credit Card :- Plastic compounding and molding, Printing, Lamination, Cutting and Embossing. ii) Carrying case:- injection moulding iii) Hollow cylinder:- extrusion iv) Knobs:- compression moulding

thumb_up_alt 0 like thumb_down_alt 0 dislike
24 views 1 answer
Description :

Answer :

The critical resistance of the D.C. generator is the resistance of field.

thumb_up_alt 0 like thumb_down_alt 0 dislike
371 views 1 answer
Description :

Answer :

Flashing the field of D.C. generator means creating residual magnetism by a D.C. source.

thumb_up_alt 0 like thumb_down_alt 0 dislike
66 views 1 answer
Description :

Answer :

D.C. generator generally preferred for charging automobile batteries is long shunt compound generator.

thumb_up_alt 0 like thumb_down_alt 0 dislike
194 views 1 answer
Description :

Answer :

Welding generator will have lap winding.

thumb_up_alt 0 like thumb_down_alt 0 dislike
61 views 1 answer
thumb_up_alt 0 like thumb_down_alt 0 dislike
193 views 0 answers
Description :

A cumulatively compounded d.c. generator is supplying 20 A at 200 V. If the series field winding is short circuited, the terminal voltage will (a) remain unaltered (b) rise to 220 V (c) shoot up to a very high value (d) become less than 200 V 

thumb_up_alt 0 like thumb_down_alt 0 dislike
75 views 0 answers
Description :

Answer :

In D.C. generators on no-load, the air gap flux distribution in space is flat topped.

thumb_up_alt 0 like thumb_down_alt 0 dislike
82 views 1 answer
Description :

Explain the choice of size and number of generator units in a power plant. 

Answer :

Selection of Size and Number of Generating Units:  1. The size/rating and number of generating units in such way that they approximately match with the load curve/load duration curve as ... power plant is connected to grid system then generating unit of higher capacity can be installed.

thumb_up_alt 0 like thumb_down_alt 0 dislike
216 views 1 answer
Description :

The fall in speed of a dc generator due to increase in load can be corrected by  (1) cooling the armature.. (2) increasing the excitation. (3) reducing the load voltage. (4) increasing the input to the prime mover

Answer :

It   can  be  corrected  by  increasing  the  input  to  the  prime  mover.

thumb_up_alt 0 like thumb_down_alt 0 dislike
172 views 2 answers
Description :

The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is :  (A) 256 W (B) 320 W (C) 500 W (D) 625 W

Answer :

The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : 625 W

thumb_up_alt 0 like thumb_down_alt 0 dislike
82 views 1 answer
Description :

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load  (A) The armature current increases and the power factor decreases  (B) The armature current decreases and the power factor also decreases  (C) The armature current decreases and the power factor increases but is lagging  (D) The armature current decreases and the power factor increases and is leading

Answer :

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load The armature current decreases and the power factor increases and is leading

thumb_up_alt 0 like thumb_down_alt 0 dislike
96 views 1 answer
...