Quiz Questions

Question 1 1 Marks

What is the possible cause of motor not running and no operating sound of magnetic switch?

A

Burnt commutator

B

Battery discharged

C

Worn brushes

D

Worn pinion tip

Question 2 1 Marks

What is the function of over running clutch in the starting system?

A

Protect armature from damge

B

Prevent sliding movement of pinion

C

Operate the solenoid

D

Drive the armature shaft

Question 3 1 Marks

What is the working principle of alternator?

A

Ohms law

B

Law of resistance

C

Electromagnetic induction

D

Lenz's law

Question 4 1 Marks

How the armature winding ends are connected with commutator?

A

By welding

B

By soldering

C

By riveting

D

By brazing

Question 5 1 Marks

What is the material used to make diodes?

A

Mica

B

Silicon

C

Alumina foil

D

Graphite

Question 6 1 Marks

What is the contributory cause of starter motor running but not cranking?

A

Abnormally woem brush

B

Over running clutch slipping

C

Faullty ECM circuit

D

Poor contacting action of ignition

Question 7 1 Marks

What causes no charge when engine is running?

A

Drive belt loose

B

Shorted rectifier

C

Sticky regulator

D

Brushes not seating properly

Question 8 1 Marks

What is the advantage of series winding type starter motor?

A

Produce high starting torque

B

Produce constant starting torue

C

Increase the life of armature

D

Less cost of maintance

Question 9 1 Marks

Which device used to prevent damage to the battery and other electrical accessories?

A

Voltage regulator

B

Current regulator

C

Distributor assembly

D

Alternator

Question 10 1 Marks

Why anti drift spring is provided in the bendix drive starting system?

A

Provide grip over armature shaft

B

Avoid the side way movement of armature shaft

C

Prevent pinion striking fly wheel

D

Resist wear on the fly wheel

Question 11 1 Marks

Which type of DC starter motor generally used in automoniles?

A

Series type

B

Shunt type

C

Compound type

D

Parallel type

Question 12 1 Marks

What causes charges at high rate in the alternator?

A

Open rectifier circuit

B

Open field current

C

Voltage regulator setting too low

D

Voltage regulator setting too high

Question 13 1 Marks

What is the purpose of alternator?

A

Produce more electricity at high RPM

B

Produce more electricity at low RPM

C

Produce constant electric supply at high RPM

D

Produce variable electric supply at high RPM

Question 14 1 Marks

What is the cause of low voltage output from alternator?

A

Faulty regulator

B

Loose mountings

C

Wornout bearing

D

Loose drive pully

Question 15 1 Marks

What will be the result of loose drive pulley in the alternator?

A

Charges at high rate

B

Low voltage output from alternator

C

No change when engine running

D

Alternator noisy

Question 16 1 Marks

What is the purpose of ?V? pulley in the
charging system?

A

Drive the cam shaft

B

Rotate the alternator rotor

C

Drive the crank shaft

D

Support rectifiter mounting plates

Question 17 1 Marks

Which type of winding is connected to the starter switch in the solenoid switch?

A

Pull in winding

B

Hold in winding

C

Compound winding

D

Primary winding

Question 18 1 Marks

What is the function of drive end frame in the alternator?

A

Carriers driving pulley

B

Connecting to spring loaded brush

C

Allow current flow in one direction

D

Support the pre lubricated sealed bearing

Question 19 1 Marks

Which part of bendix drive starting system limit the turning of the sleeve on the armature shaft?

A

Pinion

B

Bendix drive spring

C

Anti drift spring

D

Fly wheel

Question 20 1 Marks

Why the brushes are provided with a curvature at the bottom in the starting system?

A

Prevent wear on commutator

B

Provide more contact with commutator

C

Ensure proper heat dessipation

D

Provide ventilation to commutator

Question 21 1 Marks

What is the adverse effect of fly wheel ring to starter pinion ratio is very high?

A

Reduce the starting torque

B

Damage to starter motor

C

Increase the starting torque

D

Starter motor fails to start

Question 22 1 Marks

How the alternator field terminal is connected to the battery?

A

By ignition switch

B

By indicator lamp

C

By charge indicator

D

By voltage regulator

Question 23 1 Marks

What is the function of solenoid switch?

A

Open and close the circuit between primary and secondary

B

Stepdown voltage from primary to secondary winding

C

Close the contact between battery and starting motor

D

Shift the lever to engage the plunger

Question 24 1 Marks

Where the starter motor located?

A

Front side of engine

B

Rear side of engine

C

Top side of engine

D

Bottom of engine

Question 25 1 Marks

What is the purpose of slot provided in the laminated cylindrical iron core of stator assembly?

A

For lubricantion

B

For fitting insulated windings

C

For easy fitting

D

Provide space for cooling

Question 26 1 Marks

What is the minimum RPM of crank shaft required to start the engine?

A

180 RPM

B

200 RPM

C

100 RPM

D

150 RPM

Question 27 1 Marks

What will be the result of worn teeth of ring gear in the starting system?

A

Motor running but too fast

B

Motor not running no operating sound of magentic switch

C

Starter motor running too slow

D

Starter motor running but not cranking

Question 28 1 Marks

What is the function of diodes?

A

Convert AC to DC

B

Convert DC to AC

C

Step up voltage

D

Step down voltage

Question 29 1 Marks

What is the function of rotor assembly?

A

Supports pre lubricated scaled bearing

B

Carriers driving pulley and cooling fan

C

Allow the current flow in one direction

D

Supports rectifier mounting plates

Question 30 1 Marks

Why it is necessary to disengage the starter pinion from fly wheel ring gear once the engine has started?

A

Prevent damage to starter motor

B

Prevent wastage of current

C

Reduce the wear on commutator

D

Increase the fuel efficiency