ITI Electrician Mock Test - Semester 3 : Mock Test

Module 1 – DC Generator
Module 2 – DC Motor

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Created on May 10, 2025
Electrician

ITI Electrician Mock Test - Semester 3

Semester : 3
Module 1 - DC Generator
Module 2 - DC Motor

Name

1 / 124

Category: Electrician Sem 3 Module 2

Why starters are required to start D.C motors in industries?

A) Regulate the field voltage

B) Reduce the armature current

C) Control the armature reaction

D) Smooth operation of motors

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Category: Electrician Sem 3 Module 1

What is the effect in D.C generator, if it is kept ideal for long time?

A) Field coil resistance increases

B) Armature resistance increases

C) Increase the armature reaction

D) Looses its residual magnetism

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Category: Electrician Sem 3 Module 2

Which instrument is used to measure armature winding resistance?

A) Megger

B) Multimeter

C) Series type Ohm meter

D) Kelvin bridge

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Category: Electrician Sem 3 Module 2

Which method of speed control gives below the rated speed in DC series motor?

A) Field diverter method

B) Tapped field method

C) Voltage control method

D) Armature diverter method

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Category: Electrician Sem 3 Module 2

Which type of DC motor is used in elevators?

A) DC series motor

B) DC shunt motor

C) DC differential compound motor

D) DC cumulative compound motor

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Category: Electrician Sem 3 Module 2

How to obtain opposite polarity in adjacent poles of a 4 pole DC motor?

A) Varying the number of turns in coil

B) Making series connection of coils

C) Making parallel connection of coils

D) Making current flow in different direction

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Category: Electrician Sem 3 Module 2

Which type of armature winding is illustrated?

A) Triplex wave winding

B) Duplex wave winding

C) Progressive lap winding

D) Retrogressive lap winding

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Category: Electrician Sem 3 Module 1

What is the name of the part marked as ‘X’ in DC generator?

A) Armature core

B) Brush

C) Commutator raiser

D) Commutator segment

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Category: Electrician Sem 3 Module 1

Which type of D.C Generator works in absence of residual magnetism?

A) Shunt generator

B) Series generator

C) Compound generator

D) Separately excited generator

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Category: Electrician Sem 3 Module 2

What is the effect in a D.C shunt motor, if its supply terminals are interchanged?

A) Runs in slow speed

B) Runs in high speed

C) Runs in the same direction

D) Runs in the reverse direction

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Category: Electrician Sem 3 Module 2

What is the necessity of starter for D.C motor?

A) Limit the field current

B) Limit the field voltage

C) Control the motor speed

D) Limit the armature current

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Category: Electrician Sem 3 Module 2

Which rule determines the direction of rotation of armature in D.C motor?

A) Right hand grip rule

B) Right hand palm rule

C) Fleming’s left hand rule

D) Fleming’s right hand rule

13 / 124

Category: Electrician Sem 3 Module 2

Why the direction of rotation is changed only by
changing the armature current direction in a D.C
compound motor?

A) Maintain rated speed

B) Maintain motor characteristics

C) Avoid armature reaction effect

D) Prevent motor from over loading

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Category: Electrician Sem 3 Module 1

Which voltage drop is indicated in the portion marked as ‘X’?

A) Full load voltage drop

B) Armature voltage drop

C) Armature reaction drop

D) Shunt field voltage drop

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Category: Electrician Sem 3 Module 2

What is the action of the induced emf in a running D.C motor?

A) Decreases the armature current

B) Assists the applied voltage

C) Opposes the applied voltage

D) Increases the armature current

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Category: Electrician Sem 3 Module 1

What is the principle of D.C generator?

A) Cork screw rule

B) Fleming’s left hand rule

C) Fleming’s right hand rule

D) Faradays laws of electromagnetic induction

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Category: Electrician Sem 3 Module 1

What is the purpose of pole shoe in DC generator?

A) Reduce the air gap

B) Increase the field strength

C) Minimize the magnetic losses

D) Spread out flux uniformly in the air gap

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Category: Electrician Sem 3 Module 1

What is the formula for dynamically induced emf?

A) BLV volts

B) BL sinθ volts

C) BLV sinθ volts

D) BLV cosθ volts

19 / 124

Category: Electrician Sem 3 Module 2

What is the name of the equipment?

A) Megger

B) Earth resistance tester

C) Internal growler

D) External growler

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Category: Electrician Sem 3 Module 2

What is the name of the speed control method of DC motor?

A) Field diverter method

B) Field tapping method

C) Voltage control method

D) Armature diverter method

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Category: Electrician Sem 3 Module 2

Which speed control method is used in food mixture motors?

A) Voltage control method

B) Field diverter control method

C) Armature diverter method

D) Series field tapping method

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Category: Electrician Sem 3 Module 1

How the effect of armature reaction can be neutralized in large DC generators?

A) Using compensating winding

B) Providing additional inter poles

C) Increasing brush contact resistance

D) Adding resistance wires with winding

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Category: Electrician Sem 3 Module 1

Why the pole core stampings are laminated in DC generator?

A) Reduce the friction loss

B) Reduce the windage loss

C) Reduce the hysteresis loss

D) Reduce the eddy current loss

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Category: Electrician Sem 3 Module 2

What is the purpose of tapes in winding?

A) Insulate slots

B) Bind the coils

C) Wrap the conductor

D) Insulate exposed conductors

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Category: Electrician Sem 3 Module 2

Which rule is applied to identify the direction of flux in DC motor?

A) Cork’s screw rule

B) Right hand grip rule

C) Fleming’s left hand rule

D) Fleming’s right hand rule

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Category: Electrician Sem 3 Module 1

Why the D.C generator should run in clockwise direction only?

A) Protect brushes from damage

B) Protect the residual magnetism

C) Avoid short circuit in armature

D) Avoid over loading of generator

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Category: Electrician Sem 3 Module 1

What is the formula to calculate back emf of a D.C motor?

A) .

B) .

C) .

D) .

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Category: Electrician Sem 3 Module 2

How No volt coil is connected in a three point
starter with DC shunt motor?

A) Directly connected to supply

B) Connected in series with armature

C) Connected in parallel with armature

D) Connected in series with shunt field

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Category: Electrician Sem 3 Module 2

Why carbon composition brush requires in the armature circuit to operate the D.C motor?

A) Increases the starting torque

B) Protects from armature reaction

C) Protects armature from over loading

D) Reduces the spark in the commutator segment

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Category: Electrician Sem 3 Module 1

What is the function of split rings in DC generator?

A) Increases the terminal voltage than rated

B) Maintain constant voltage

C) Collects the current unidirectionally

D) Reduces the voltage drop at brushes

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Category: Electrician Sem 3 Module 1

How interpoles are connected in a DC generator?

A) In series with armature

B) In parallel with armature

C) In series with shunt field

D) In parallel with shunt field

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Category: Electrician Sem 3 Module 1

Which metal is used to make large capacity DC generator yoke?

A) Cast iron

B) Soft iron

C) Aluminium

D) Rolled Steel

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Category: Electrician Sem 3 Module 1

What is the function of split rings in a D.C generator?

A) Supplies output continuously

B) Makes output in the uni direction

C) Makes output in the opposite direction

D) Collects the output from alternate conductors

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Category: Electrician Sem 3 Module 2

Calculate the average pitch (YA) for retrogressive wave winding, if No. of armature
conductor = 14
No. of slots = 7
No. of poles = 2

A) 4

B) 6

C) 8

D) 14

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Category: Electrician Sem 3 Module 1

What is the effect if the shunt field resistance is above critical resistance value in a D.C generator?

A) Output voltage is pulsating

B) Output voltage is above normal

C) Generator fails to build up voltage

D) Generator builds up voltage normally

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Category: Electrician Sem 3 Module 2

What is the operation in the rewinding process?

A) Cleaning of slots

B) Removing of winding

C) Removing of wedges

D) Cutting of winding wire

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Category: Electrician Sem 3 Module 2

Which speed control method of D.C series motor is used for electric train?

A) Field diverter method

B) Field tapping method

C) Armature diverter method

D) Supply voltage control method

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Category: Electrician Sem 3 Module 1

How many parallel paths in duplex lap winding of a 4 pole DC generator?

A) 4

B) 6

C) 8

D) 12

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Category: Electrician Sem 3 Module 2

Which type of D.C motor is used for constant speed drives?

A) DC series motor

B) DC shunt motor

C) Differential long shunt compound motor

D) Differential short shunt compound motor

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Category: Electrician Sem 3 Module 1

Which type of DC generator is used for electroplating process?

A) Shunt generator

B) Series generator

C) Differential compound generator

D) Cumulative compound generator

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Category: Electrician Sem 3 Module 1

Why the terminal voltage decreases if load increases in DC shunt generator?

A) Because of armature reaction effect

B) Due to increased in armature resistance

C) Because of brush voltage drop decreases

D) Due to increased in shunt field inductance

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Category: Electrician Sem 3 Module 2

Which is the most effective method of balancing
armature?

A) Static balancing

B) Dynamic balancing

C) Attached with counter balancing

D) Plugged with lead weight balancing

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Category: Electrician Sem 3 Module 2

What is the formula to calculate the current taken by D.C shunt motor armature?

A) .

B) .

C) .

D) .

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Category: Electrician Sem 3 Module 1

What is the property of wave winding in D.C generator?

A) Low current low voltage

B) High current low voltage

C) Low current high voltage

D) High current high voltage

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Category: Electrician Sem 3 Module 1

Why the armature core of a DC generator is laminated?

A) Reduce the copper loss

B) Reduce the friction loss

C) Reduce the hysteresis loss

D) Reduce the eddy current loss

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Category: Electrician Sem 3 Module 2

Which type of DC motor is used for sudden application of heavy loads?

A) Shunt motor

B) Series motor

C) Differential compound motor

D) Cumulative compound motor

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Category: Electrician Sem 3 Module 1

Why compensating winding is provided in
large DC generators?

A) Connect more loads

B) Reduce commutation effect

C) Neutralize armature reaction effect

D) Increase the efficiency of generator

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Category: Electrician Sem 3 Module 2

Why commutators are sparking heavily?

A) Incorrect brush position

B) Incorrect field connection

C) Incorrect direction of rotation

D) Incorrect armature connection

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Category: Electrician Sem 3 Module 2

Which insulating material used in winding is a highly non -hygroscopic and possess good electrical strength?

A) Empire cloth

B) Triplex paper

C) Millinex paper

D) Leatheroid paper

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Category: Electrician Sem 3 Module 1

What is the name of the part marked ‘X’ in DC generator?

A) Pole tip

B) Pole coil

C) Pole core

D) Pole shoe

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Category: Electrician Sem 3 Module 1

Calculate the emf generated in a 4 pole DC generator with simplex wave wound armature has 1020 conductors and driven at a speed of 1500 rpm, the flux / pole is
0.007 webers?

A) 178 V

B) 243 V

C) 357 V

D) 428 V

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Category: Electrician Sem 3 Module 1

What is the purpose of resistance wire used in the commutator connection in D.C generator?

A) Maintain constant voltage

B) Nullifying statically induced emf

C) Increasing statically induced emf

D) Smooth reversal of current direction

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Category: Electrician Sem 3 Module 1

Which formula is used to calculate the generated emf in D.C generator?

A) .

B) .

C) .

D) .

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Category: Electrician Sem 3 Module 1

What is the cause for heavy sparking in brushes of DC generator?

A) Short circuit in field winding

B) Short circuit in armature winding

C) MNA and GNA position changed

D) Too much spring tension at brush

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Category: Electrician Sem 3 Module 2

Which winding wire is used for DC field coil?

A) Super enameled copper wire

B) Single silk covered copper wire

C) Double silk covered copper wire

D) PVC covered copper winding wire

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Category: Electrician Sem 3 Module 1

What is the name of D.C generator's field?

A) Short shunt compound generator

B) Long shunt compound generator

C) Differential compound generator

D) Cumulative compound generator

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Category: Electrician Sem 3 Module 2

What is the purpose of NVC connected in series with the field in 3 point starter?

A) To improve the torque

B) Reduce the field current

C) To decrease the back emf

D) To prevent increase in speed

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Category: Electrician Sem 3 Module 1

Which method is used to improve the insulation resistance in DC generator?

A) Replacing the brushes frequently

B) Heating the machine by running periodically

C) Cleaning the commutator segments regularly

D) Blowing hot air in to the machine during maintenance

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Category: Electrician Sem 3 Module 1

What is the name of D.C generator?

A) Differential long shunt compound

B) Differential short shunt compound

C) Cumulative long shunt compound

D) Cumulative short shunt compound

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Category: Electrician Sem 3 Module 1

Which are the two points that the brush contact resistance measured in D.C
machines?

A) Resistance between the opposite brushes

B) Resistance between brush and commutator raiser

C) Resistance between brush and commutator

D) Resistance between brush and armature conductors

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Category: Electrician Sem 3 Module 1

Calculate the induced emf of 4 pole dynamo having 1000 rpm lap wound and total number of conductors is 600, the flux / pole is 0.064 wb?

A) 160V

B) 320V

C) 480V

D) 640V

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Category: Electrician Sem 3 Module 1

Which metal is used to make pole core of large DC generator machines?

A) Soft iron

B) Cast iron

C) Cast steel

D) Stainless steel

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Category: Electrician Sem 3 Module 2

Which insulating material belongs to class ‘B’ insulation?

A) Cotton

B) Bamboo

C) Fiber glass

D) Leatheroid paper

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Category: Electrician Sem 3 Module 2

Which instrument is used to test armature winding for short and open circuit?

A) Tong Tester

B) Internal Growler

C) External Growler

D) Digital multimeter

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Category: Electrician Sem 3 Module 2

Which motor has this characteristics curve?

A) Series motor

B) Shunt motor

C) Cumulative compound motor

D) Differential compound motor

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Category: Electrician Sem 3 Module 2

What is the name of D.C motor?

A) D.C shunt motor

B) D.C series motor

C) D.C differential compound motor

D) D.C cumulative compound motor

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Category: Electrician Sem 3 Module 2

Which rule determines the direction of current in D.C motor?

A) Right hand grip rule

B) Right hand palm rule

C) Fleming’s left hand rule

D) Fleming’s right hand rule

68 / 124

Category: Electrician Sem 3 Module 1

Which rule is used to find direction of magnetic field?

A) Cork screw rule

B) Right hand palm rule

C) Fleming’s left hand rule

D) Fleming’s right hand rule

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Category: Electrician Sem 3 Module 1

What is the purpose of field coils in D.C generator?

A) To increase the flux in air gap

B) To decrease the magnetizing current

C) To magnetize the poles to produce coil flux

D) To increase the reluctance of magnetic path

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Category: Electrician Sem 3 Module 1

What is the name of the part of DC generator?

A) Stator

B) Pole core

C) Pole shoes

D) Yoke (or) frame

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Category: Electrician Sem 3 Module 1

What is the necessity of residual magnetism in a self excited DC generator?

A) Build up the voltage

B) Reduce the field current

C) Reduce armature current

D) Maintain the constant output voltage

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Category: Electrician Sem 3 Module 2

What is the speed, if field winding of a DC shunt motor is in open circuit?

A) Stop running

B) Motor runs normally

C) Runs at slow speed

D) Runs in very high speed

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Category: Electrician Sem 3 Module 2

What is the reason for reduction in speed of a D.C shunt motor from no load to full load?

A) Shunt field current increases

B) Shunt field current decreases

C) Armature voltage drop increases

D) Armature voltage drop decreases

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Category: Electrician Sem 3 Module 2

Why the newly rewound armature must be preheated before varnishing?

A) Drive out the moisture from it

B) Help for quick drying of varnish

C) Make easy to penetrate varnish inside

D) Maintain uniform spreading of varnishing

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Category: Electrician Sem 3 Module 2

How many parallel paths in duplex lap winding in the armature of 4 pole D.C Motor?

A) 2

B) 4

C) 6

D) 8

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Category: Electrician Sem 3 Module 2

Which type of armature winding is illustrated?

A) Duplex lap winding

B) Triplex lap winding

C) Simplex lap winding

D) Quadruplex lap winding

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Category: Electrician Sem 3 Module 2

What reduces the cross sectional area of core material for VA rating?

A) Dynamo sheet

B) Low alloy sheet

C) High alloy sheet

D) Normal steel sheet

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Category: Electrician Sem 3 Module 2

Which type of instrument is used to test the armature winding?

A) Megger

B) Growler

C) Multimeter

D) Ohmmeter

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Category: Electrician Sem 3 Module 1

What is the reason for DC generator fails to build up voltage?

A) Loose brush contact

B) Armature resistance is more

C) Field resistance is above critical resistance

D) Prime mover is running at above rated speed

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Category: Electrician Sem 3 Module 1

What is the name of the D.C generator?

A) Shunt generator

B) Series generator

C) Compound generator

D) Separately excited generator

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Category: Electrician Sem 3 Module 2

Which winding fault is determined by the test?

A) Open coil fault

B) Short coil fault

C) Grounded coil fault

D) Grounded core faul

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Category: Electrician Sem 3 Module 1

Why armature resistance of a D.C generator is very low?

A) Reduce armature current

B) Reduce armature voltage drop

C) Run armature with less weight

D) Reduce the temperature of armature

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Category: Electrician Sem 3 Module 2

Why shunt field coil is connected in series with holding coil in D.C three point starter?

A) Increase the holding coil current

B) Decrease the holding coil current

C) Protect the shunt field from over current

D) Protect the motor in case of open in shunt field

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Category: Electrician Sem 3 Module 2

Why the D.C series motor field winding is wound with thick wire?

A) To regulate field voltage

B) To carry the load current

C) To keep maximum inductance

D) To reduce the armature reaction

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Category: Electrician Sem 3 Module 2

Why series motor produce high torque and
speed initially without load?

A) Absence of back emf

B) Load current flows through field winding

C) Armature current and field current are same

D) Series field winding wound with thick wire

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Category: Electrician Sem 3 Module 1

Name the part of DC generator?

A) Side end plates

B) Pole shoe lamination

C) Commutator segment

D) Armature core lamination

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Category: Electrician Sem 3 Module 2

Name the type of DC motor.

A) Shunt motor

B) Series motor

C) Long shunt compound motor

D) Short shunt compound motor

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Category: Electrician Sem 3 Module 2

What is the purpose of resistor connected with holding coil in 4 point starter?

A) Limit current in NVC

B) Protect the coil from short circuit

C) Protect the motor from overload

D) Protect the armature from short circuit

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Category: Electrician Sem 3 Module 2

How the direction of rotation of a DC compound
motor is changed?

A) By changing the direction of armature current

B) By interchanging the supply terminals

C) By changing the direction of both field and armature current

D) By changing the direction of series field current

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Category: Electrician Sem 3 Module 2

What is the best method to change the DOR of a compound motor without change of its characteristics?

A) Change armature current direction

B) Change shunt field current direction

C) Change series field current direction

D) Change the current in armature and shunt field together

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Category: Electrician Sem 3 Module 1

Which rule is used to find the direction of induced emf in D.C generator?

A) Cork screw rule

B) Right hand palm rule

C) Fleming’s left hand rule

D) Fleming’s right hand rule

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Category: Electrician Sem 3 Module 1

What is the purpose of slot marked as ‘X’?

A) To fix the key way

B) To make air circulation

C) For lubrication purpose

D) For easy removal from shaft

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Category: Electrician Sem 3 Module 1

Why DC generators are loosing their residual magnetism?

A) Heavy short circuit in load

B) Running without load continuously

C) Continuous running without break

D) Change of direction of rotation very often

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Category: Electrician Sem 3 Module 2

Which type of test is illustrated for the armature after rewound?

A) Open coil test

B) Shorted coil test

C) Voltage drop test

D) Grounded coil test

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Category: Electrician Sem 3 Module 2

Which speed control methods offers below normal speed in DC shunt motor?

A) Field control method

B) Voltage control method

C) Armature control method

D) Ward Leonard system of speed control

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Category: Electrician Sem 3 Module 1

Which material is used to make brush in generator?

A) Steel and graphite

B) Carbon and graphite

C) Cast iron and graphite

D) Aluminium and graphite

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Category: Electrician Sem 3 Module 1

Why solid pole shoes are used in D.C generator?

A) To reduce the copper loss

B) To increase the residual magnetism

C) To decrease the residual magnetism

D) To reduce the reluctance of magnetic path

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Category: Electrician Sem 3 Module 2

Which type of D.C motor is suitable for shearing
machines?

A) Shunt motor

B) Series motor

C) Cumulative compound motor

D) Differential compound motor

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Category: Electrician Sem 3 Module 2

What is the name of winding, if coil pitch is less than pole pitch?

A) Full pitch winding

B) Half pitch winding

C) Long chorded winding

D) Short chorded winding

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Category: Electrician Sem 3 Module 1

Which type of DC generator is used for long distance distribution lines?

A) Shunt generator

B) Series generator

C) Differential compound generator

D) Cumulative compound generator

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Category: Electrician Sem 3 Module 2

What is the effect, if a four point starter resistance is cutoff during running?

A) Motor stopped

B) Runs at slow speed

C) Runs at very high speed

D) Runs at reverse direction

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Category: Electrician Sem 3 Module 2

Where D.C compound motors are preferred?

A) Constant load requirements

B) Constant speed requirements

C) High starting torquerequirements

D) Constant speed under varying load requirements

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Category: Electrician Sem 3 Module 2

Which formula is used to calculate the speed of DC motor?

A) .

B) .

C) .

D) .

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Category: Electrician Sem 3 Module 2

Which material is used for starting resistance of
DC starters?

A) Eureka

B) Nichrome

C) Manganin

D) Constantine

105 / 124

Category: Electrician Sem 3 Module 1

What is the name of generator, if its field is
connected in parallel with armature?

A) Shunt generator

B) Series generator

C) Compound generator

D) Self excited generator

106 / 124

Category: Electrician Sem 3 Module 1

Which type of D.C generator is used for arc welding?

A) Shunt generator

B) Series generator

C) Differential compound generator

D) Cumulative compound generator

107 / 124

Category: Electrician Sem 3 Module 2

What is the formula to calculate back EMF in a DC motor

A) .

B) .

C) .

D) .

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Category: Electrician Sem 3 Module 2

What is the purpose of series resistor connected with holding coil in a D.C four point starter?

A) Limit the current in holding coil

B) Increase the current in holding coil

C) Increase the voltage in holding coil

D) Decrease the voltage in holding coil

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Category: Electrician Sem 3 Module 1

What is the purpose of compensating winding in DC generator?

A) Minimizes rough commutation

B) Maintain constant output voltage

C) Neutralizes the demagnetizing effect

D) Decreases the excitation current of field coils

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Category: Electrician Sem 3 Module 2

Which growler test for armature is illustrated?

A) Open coil test

B) Grounded coil test

C) Shorted coil test

D) Shorted commutator test

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Category: Electrician Sem 3 Module 2

Which DC compound motor is operated at
constant speed under varying load?

A) Differential long shunt

B) Cumulative long shunt

C) Differential short shunt

D) Cumulative short shunt

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Category: Electrician Sem 3 Module 2

Which type of DC armature winding the front pitch (YF) is greater than back pitch (YB)?

A) Lap winding

B) Wave winding

C) Progressive winding

D) Retrogressive winding

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Category: Electrician Sem 3 Module 2

Which speed control system provides a smooth variation of speed from zero to above normal?

A) Field control

B) Armature control

C) Field diverter control

D) Ward-Leonard system control

114 / 124

Category: Electrician Sem 3 Module 2

What is the temperature value of class ‘F’ insulation?

A) 90°C

B) 105°C

C) 120°C

D) 155°C

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Category: Electrician Sem 3 Module 1

What is the name of the compound generator, if the shunt field is connected in parallel with armature?

A) Long shunt compound

B) Cumulative compound

C) Differential compound

D) Short shunt compound

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Category: Electrician Sem 3 Module 2

Which type of speed control of D.C series motor?

A) Field parallel method

B) Field diverter method

C) Field tapping method

D) Armature diverter method

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Category: Electrician Sem 3 Module 1

Which energy is converted into electrical energy by generator?

A) Heat

B) Kinetic

C) Chemical

D) Mechanical

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Category: Electrician Sem 3 Module 1

How does the magnetic circuit complete through the yoke and poles in a generator?

A) Field coils

B) Armature core

C) Laminated pole core

D) Winding conductors in armature

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Category: Electrician Sem 3 Module 2

Why the series field is short circuited at the time
of starting in differential compound motor?

A) To reduce the starting current

B) To increase the speed of motor

C) To decrease the speed of motor

D) To maintain proper direction of rotation

120 / 124

Category: Electrician Sem 3 Module 2

Which speed control method is applied to obtain both below normal and above normal speed in DC motor?

A) Field control method

B) Armature control method

C) Tapped field speed control

D) Ward Leonard speed control

121 / 124

Category: Electrician Sem 3 Module 1

5 What is the effect on induced emf if the main field flux get distorted in DC generator?

A) Induced emf increases

B) Induced emf decreases

C) No change in induced emf

D) Induced emf becomes zero

122 / 124

Category: Electrician Sem 3 Module 1

What is the effect of armature reaction in DC generator?

A) Output voltage increases

B) Output voltage decreases

C) Output voltage is pulsating

D) Output voltage will become zero

123 / 124

Category: Electrician Sem 3 Module 1

Which type of voltage is induced dynamically in a D.C generator?

A) Pulsating voltage

B) Oscillating voltage

C) Alternating voltage

D) Direct current voltage

124 / 124

Category: Electrician Sem 3 Module 2

Why the holding coil of a 3 point starter is connected in series with shunt field?

A) To limit the load current

B) To run motor at low voltage

C) To hold the handle plunger firmly

D) To protect the motor from high speed

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