Starters

The most common cause of thrown starter armature windings is:

high current draw.

grounded armature.

overspeeding.

grounded field windings.

Correct! Wrong!

To test a starter armature for a short circuit, the most effective test would be to:

use a powered test light and connect one lead to the starter armature shaft while connecting the other lead to the commutator.

mount the armature in a growler and rotate to see if the growler growls.

use an ohmmeter to test individual conductors.

apply a circuit load to armature to measure amp flow.

Correct! Wrong!

To test starter armature for an open circuit, the most effective test would be to:

use a powered test light and connect one lead to the starter armature shaft while connecting the other lead to the commutator.

mount the armature in a growler and rotate to see if the growler growls.

use an ohmmeter to test individual conductors.

apply a circuit load to armature to measure amp flow.

Correct! Wrong!

With a small current draw with a load tester and no starter rotation or engagement, the most likely cause would be:

defective starter drive.

grounded armature.

the solenoid pull in winding not functioning.

the thermal portion device has tripped.

Correct! Wrong!

To prevent overheating of the starter motor, cranking time should not exceed:

30 seconds.

45 seconds.

60 seconds.

80 seconds.

Correct! Wrong!

The following are all possible causes of a poor starter ground EXCEPT:

loose mounting bolts.

a missing starter ground strap.

a missing engine-to-frame ground strap.

corroded cab mounts.

Correct! Wrong!

A customer has a truck towed to the shop and says that the starter would not crank the engine over. What would the logical first starting point be?

ground cable connection at the starter.

the starter solenoid circuit.

the ignition switch crank circuit.

a good visual and the battery for proper charge.

Correct! Wrong!

Which of the following is a component of a starting circuit?

a solenoid.

a ballast resistor.

a voltage regulator.

an electronic control module (ECM).

Correct! Wrong!

A failure for a starter to rotate but with a high current draw indicates:

a direct ground in the starter fields.

an open in the armature.

broken brush springs with no load.

failed magnetic switch.

Correct! Wrong!

How is the starter ground circuit check performed?

a voltmeter is connected between the ground terminal of the battery and the ground of the starter and read while the engine is being cranked.

an ohmmeter is connected between the starter relay housing and the starter housing and read while the engine is being cranked.

an ohmmeter is connected between the ground side of the battery and the starter housing and read while the engine is cranking.

a voltmeter is connected between the positive side of the battery and the starter solenoid while the engine is off.

Correct! Wrong!

All of these are part of a starter motor EXCEPT:

an armature.

a commutator.

field coils.

a regulator.

Correct! Wrong!

A truck with a starting-safety switch is brought in for service. Technician A says that the starting-safety switch is used to prevent vehicles with automatic transmissions from being started in gear. Technician B states that starting-safety switches are often called neutral safety switches. Who is right?

Technician A.

Technician B.

both A and B.

neither A nor B.

Correct! Wrong!

13) When inspecting a starter that is noisy while cranking. Technician A says to check for loose mounting bolts. Technician B says that a thorough visual inspection is in order. Who is right?

A only.

B only.

both A and B.

neither A nor B.

Correct! Wrong!

When checking cranking circuit voltage loss on the insulated side of the starting circuit, the technician uses a digital multimeter on the voltage setting and performs which of these?

connect the voltmeter red test lead to the battery positive, the black lead to the starter solenoid stud while cranking.

connect the voltmeter black test lead to the battery positive, the red lead to the starter solenoid stud while cranking.

connect the voltmeter red test lead to the battery positive, the black lead to the starter solenoid stud.

connect the voltmeter black test lead to the battery positive, the red lead to the starter solenoid stud.

Correct! Wrong!

What could likely be the cause of an engine cranking slowly?

a weak battery.

cold thick oil.

high resistance in the starter circuit.

all of the above.

Correct! Wrong!

When the speed of a starter motor increases:

torque decreases.

current draw decreases.

battery voltage goes down.

both A and B.

Correct! Wrong!

A compound wound starter motor has a(n):

excessively high free running speed.

shunt field winding.

no ground brushes.

no insulated brushes.

Correct! Wrong!

Starter solenoids are wound with a winding having a higher current flow called:

the pull in winding.

the hold in winding.

the series wound winding.

the parallel wound winding.

Correct! Wrong!

The solenoid winding that is responsible for moving the starter drive into mesh with the ring gear is the:

pull in winding.

hold in winding.

lap winding.

wave winding.

Correct! Wrong!

The overrunning clutch accomplishes which of the following?

allows the engine speed to overrun the starter motor speed.

protects the starter bushings from damage caused by high speed.

protects the starting motor from spinning too rapidly.

all of the above.

Correct! Wrong!

Starter armatures are checked for short circuits using:

a volt meter.

a load tester.

a growler.

an ammeter.

Correct! Wrong!

Failure of the starter to operate, combined with a high current draw could result from:

high internal electrical resistance.

an open field or armature.

dirty brushes.

an internal field or armature ground.

Correct! Wrong!

Efficient starter operation is most dependant upon:

proper engine oil.

a well oiled starter drive.

a fully charged battery.

a dust free armature.

Correct! Wrong!

A starter with a very low current draw, fails to operate, or have sufficient power, could be the result of:

open armature or field.

internal ground.

a shorted armature or field.

a shorted hold in coil.

Correct! Wrong!

When starting a vehicle, the starter spins over freely but the engine does not rotate. The problem is likely with the:

solenoid.

battery.

starter drive.

none of the above.

Correct! Wrong!

More current can pass through a set of series wound field coils than through a set of parallel wound field coils.

True.

False.

Correct! Wrong!

In all starting motors the adjacent pole shoes are of opposite polarity, providing a north, south, north, south sequence around the frame.

True.

False.

Correct! Wrong!

A technician converts a truck from a 24 volt starting system to a 12 volt starting system. To ensure the starter functions properly in adverse conditions he would also have to:

install larger wiring from the batteries to the starter.

choose a high speed starter.

increase the charging system voltage limit.

increase the alternator current output.

Correct! Wrong!

The purpose for a magnetic switch in a starting system is to:

omit the need for large wiring to and from the ignition switch.

provide for a shorter path for current to flow to the starter solenoid motor terminals.

reduce the amount of current flowing through the ignition switch, increasing its life.

all of the above.

Correct! Wrong!

When a heavy copper band or wire is wrapped around the pole pieces in a starter, this coil is known as a:

armature winding.

field coil.

shunt winding.

parallel winding.

Correct! Wrong!

To constantly reverse the direction of current flow in the starter armature the current passes through the brushes into the:

pole pieces.

end housing.

commutator.

bendix.

Correct! Wrong!

When an armature is tested on a growler and the metal strip or hacksaw blade vibrates over a winding, that winding is:

open.

shorted.

normal.

grounded.

Correct! Wrong!

A starter solenoid that has "an open" in the pull in windings will do which of the following when activated from the start switch?

move the starter drive into mesh with the ring gear but the starter will not turnover.

make a clunk sound but nothing will activate.

neither the solenoid not the starter will activate.

the starter will activate normally but will turn slower.

Correct! Wrong!

While the starter is cranking, the pull in solenoid windings:

do not have current flowing through them.

have the same current flowing in them as they would when the start switch initially activates them.

may become overheated from excess current flow.

force the hold in windings to disengage.

Correct! Wrong!

A customer has his vehicle towed into your shop, with the complaint that the vehicle will not start. After checking the batteries and doing a visual inspection (which are both OK) you attempt to start the vehicle, you turn the key switch but no noise is heard from the starter or the solenoid. What should you check first?

the starter/solenoid control circuit.

the engine run circuits.

the ignition switch.

the dash panel.

Correct! Wrong!

What safety precaution (s) should be taken when troubleshooting starter control and motor circuits?

make sure the vehicle is in neutral.

make sure the brakes are applied.

make sure no one is working around the radiator fan.

all of the above.

Correct! Wrong!

What might cause thrown armature windings (windings of the armature that have come out of their normal position and are rubbing on the pole shoes)?

insufficient battery power.

prolonged cranking.

overcharged batteries.

overspeeding.

Correct! Wrong!

When testing an armature, using an ohmmeter, the DMMeter reads "O.L." when one lead is touched to the armature shaft and the other lead is touched to the commulator. Is this normal for a good armature?

Yes.

No.

Correct! Wrong!

A burnt commulator bar would be an indication that the armature has a (n):

open.

ground.

short.

bent shaft.

Correct! Wrong!

When testing a disassembled starter, when one DMM lead is connected to the motor terminal field windings and the other lead is connected to the starter frame (housing), you find the ohmmeter reads "0" or "continuity" . This would be an indication that the field windings are:

shorted.

normal.

open.

grounded.

Correct! Wrong!

When testing a disassembled starter, when one lead is connected to the motor terminal field windings and the other lead is connected to the starter frame(housing), an ohmmeter reads "O.L." This would be an indication that the field windings are:

shorted.

normal.

grounded.

open.

Correct! Wrong!

When testing disassembled starter, when one lead is connected to the motor terminal and the other lead is connected to the insulated brush terminal, you find that the ohmmeter reads "0" or "continuity". This would be an indication that the field windings are:

shorted.

normal.

grounded.

open.

Correct! Wrong!

In a starter with parallel wound field windings, can you use an ohmmeter to test for open filed windings without disconnecting each of the windings from the motor terminal?

Yes.

No.

Correct! Wrong!

By alternately placing a steel bar next to each pole shoe in parallel wound field coil starter and running 60 to 70 amps through the field coils you are testing for:

open field coils.

shorted field coils.

grounded field coils.

residual magnetism.

Correct! Wrong!

A starter has a low free speed and high current draw when no-load tested. Which of these is the LEAST likely cause of such symptoms?

Tight, dirty, or worn bearings, bent armature shaft, or loose pole shoes (high friction).

Shorted armature.

Grounded armature.

A direct ground in the terminal or fields.

Correct! Wrong!

A starter control circuit test may uncover which of the following conditions?

high resistance in the solenoid switch circuit.

a loose battery cable connection.

loose battery cable connection.

short in the starter armature windings.

Correct! Wrong!

All of the following may be symptoms of a faulty starter EXCEPT:

corroded battery cables.

slow cranking of the engine.

warm battery cables or warm wiring to the starter motor.

a clicking sound from the starter solenoid.

Correct! Wrong!

The cranking current test measures:

voltage.

amps.

watts.

ohms.

Correct! Wrong!

Technician A says that a starting and charging system tester (AVR) can be used to test free spinning current draw bench tests. Technician B says that free spinning current draw bench tests must be performed with the starter solenoid removed. Who is right?

A only.

B only.

both A and B.

neither A nor B.

Correct! Wrong!

Technician A says that if the ring gear on the flywheel is damaged, the starter drive must be replaced. Technician B says if the ring gear is damaged, the ring gear should be replaced. Who is right?

A only.

B only.

both A and B.

neither A nor B.

Correct! Wrong!

The most common cause of thrown starter armature windings is:

To test a starter armature for a short circuit, the most effective test would be to:

To test starter armature for an open circuit, the most effective test would be to:

With a small current draw with a load tester and no starter rotation or engagement, the most likely cause would be:

To prevent overheating of the starter motor, cranking time should not exceed:

The following are all possible causes of a poor starter ground EXCEPT:

A customer has a truck towed to the shop and says that the starter would not crank the engine over. What would the logical first starting point be?

Which of the following is a component of a starting circuit?

A failure for a starter to rotate but with a high current draw indicates:

How is the starter ground circuit check performed?

All of these are part of a starter motor EXCEPT:

13) When inspecting a starter that is noisy while cranking. Technician A says to check for loose mounting bolts. Technician B says that a thorough visual inspection is in order. Who is right?

When checking cranking circuit voltage loss on the insulated side of the starting circuit, the technician uses a digital multimeter on the voltage setting and performs which of these?

What could likely be the cause of an engine cranking slowly?

When the speed of a starter motor increases:

A compound wound starter motor has a(n):

Starter solenoids are wound with a winding having a higher current flow called:

The solenoid winding that is responsible for moving the starter drive into mesh with the ring gear is the:

The overrunning clutch accomplishes which of the following?

Starter armatures are checked for short circuits using:

Failure of the starter to operate, combined with a high current draw could result from:

Efficient starter operation is most dependant upon:

A starter with a very low current draw, fails to operate, or have sufficient power, could be the result of:

When starting a vehicle, the starter spins over freely but the engine does not rotate. The problem is likely with the:

More current can pass through a set of series wound field coils than through a set of parallel wound field coils.

In all starting motors the adjacent pole shoes are of opposite polarity, providing a north, south, north, south sequence around the frame.

A technician converts a truck from a 24 volt starting system to a 12 volt starting system. To ensure the starter functions properly in adverse conditions he would also have to:

The purpose for a magnetic switch in a starting system is to:

When a heavy copper band or wire is wrapped around the pole pieces in a starter, this coil is known as a:

To constantly reverse the direction of current flow in the starter armature the current passes through the brushes into the:

When an armature is tested on a growler and the metal strip or hacksaw blade vibrates over a winding, that winding is:

A starter solenoid that has "an open" in the pull in windings will do which of the following when activated from the start switch?

While the starter is cranking, the pull in solenoid windings:

What safety precaution (s) should be taken when troubleshooting starter control and motor circuits?

What might cause thrown armature windings (windings of the armature that have come out of their normal position and are rubbing on the pole shoes)?

When testing an armature, using an ohmmeter, the DMMeter reads "O.L." when one lead is touched to the armature shaft and the other lead is touched to the commulator. Is this normal for a good armature?

A burnt commulator bar would be an indication that the armature has a (n):

When testing a disassembled starter, when one DMM lead is connected to the motor terminal field windings and the other lead is connected to the starter frame (housing), you find the ohmmeter reads "0" or "continuity" . This would be an indication that the field windings are:

When testing a disassembled starter, when one lead is connected to the motor terminal field windings and the other lead is connected to the starter frame(housing), an ohmmeter reads "O.L." This would be an indication that the field windings are:

When testing disassembled starter, when one lead is connected to the motor terminal and the other lead is connected to the insulated brush terminal, you find that the ohmmeter reads "0" or "continuity". This would be an indication that the field windings are:

In a starter with parallel wound field windings, can you use an ohmmeter to test for open filed windings without disconnecting each of the windings from the motor terminal?

By alternately placing a steel bar next to each pole shoe in parallel wound field coil starter and running 60 to 70 amps through the field coils you are testing for:

A starter has a low free speed and high current draw when no-load tested. Which of these is the LEAST likely cause of such symptoms?

A starter control circuit test may uncover which of the following conditions?

All of the following may be symptoms of a faulty starter EXCEPT:

The cranking current test measures:

Technician A says that a starting and charging system tester (AVR) can be used to test free spinning current draw bench tests. Technician B says that free spinning current draw bench tests must be performed with the starter solenoid removed. Who is right?

Technician A says that if the ring gear on the flywheel is damaged, the starter drive must be replaced. Technician B says if the ring gear is damaged, the ring gear should be replaced. Who is right?

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Heavy-Duty Mechanic - Trucks & Equipment