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Starters > Starting System > Flashcards

Starting System Flashcards

1
Q

Placing one growler test prod on the commutator bar and the other to armature shaft would be?
Reading?

A

Short to ground

Reading OL

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2
Q

Overheating of the start from prolonged cranking is prevented by?

A

Internal switch

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3
Q

Magnetic switch reduces current flow through?

A

Key switch

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4
Q

A low amperage reading during cranking and a slow cranking speed could be caused by?
A) poor brush and commutator condition
B) armature rubbing on the pole shoes

A

A) poor brush and commutator condition

B) this would be the opposite of (A)

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5
Q

What condition does the starter draw the least amount of current?

A

Operating free speed.

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6
Q

When testing an armature on a growler a vibrating blade would indicate?

A

Shorted

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7
Q

Why does current amperage decrease as starter speed increases?

A

CEMF

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8
Q

Starter solenoid chatter when battery voltage is testing to be good is most likely caused by?

A

Hold in winding.

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9
Q

Shorted field winding during a no load test will result in the starting motor having excessive?

A

Current

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10
Q

When the key switch is released current to the solenoid_________ is shut off.

A

Hold in/pull in

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11
Q

A starter that does not rotate and has high current draw?

A

Mechanical problem

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12
Q

Never operate a starter motor for more than ________ and cool for ________

A

30 seconds/2 minutes

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13
Q

Voltage drop reading across a cranking system ground circuit of .8 volts while the engine is cranking indicates that?

A

High resistance.

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14
Q

What prevents the overspeeding of the armature when the engine starts?

A

Overrunning clutch

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15
Q

A field winding that prevents high free running speed in a starter motor is a?

A

Shunt winding.

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16
Q

What circuit does not have to be tested on permanent magnet style starter motor?

A

Field winding

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17
Q

Open circuits in the armature do to solder thrown out of the winding is a result of?

A

Overheating

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18
Q

If the pull in windings are energized for more than 8 seconds?

A

Burn out

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19
Q

Cranking motor safety switches are connected in __________ with magnetic switch?

A

Series

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20
Q

The cranking system converts electrical energy from the battery to.

A

Mechanical energy

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21
Q

A basic test for checking starter motor internal condition while off the vehicle is the?

A

No load test

22
Q

The basic starting principle is that, when a current carrying conductor is placed in a magnetic field?

A

Due force through magnetic flux lines

23
Q

Field coil winding has been shorted to the field frame. What would be the expected results?

A

No operation

24
Q

Is there an advantage of the parallel wound field coils over the series wound coils?

A

Parallel wound field coils have more current flow/ less resistance.

Series wound field coils have more resistance less current flow.

25
Q

Starter must be able to disconnect when?

A

Engine starts to rotate

26
Q

Minimum rpm needed to start?

A

150-250

27
Q

Cranking circuit components?

A 
Starter
Battery
Solenoid/relay
Drive
Ignition switch
Neutral safety switch
28
Q

Insulated circuits consist of?

A

Armature winding coils
Field winding
Commutator

29
Q

Most torque produced when?

A

Immediately as key is switched on.

30
Q

Speed is limited by?

A

CEMF

31
Q

Shunt winding causes more?

A

CEMF in starter free running speed.

32
Q

Heavy winding

A

Pull in winding

33
Q

Light winding

A

Hold in winding

34
Q

Magnetic strength of pull in winding? How long do you crank for?

A

70amps no longer than 8 seconds

35
Q

Magnetic strength of hold in winding? How long do you crank for?

A

20 amps no longer than 8 seconds

36
Q

What kind of starter has a planetary gear set.

A

Reduction

37
Q

Normal current draw should be?

A

500 amps

38
Q

What is High current draw slow cranking?

A

Mechanical restriction.

39
Q

What is low current draw and slow cranking?

A

Electrical resistance

40
Q

Highest starter draw when?

A

Getting engine to start turning.

41
Q

Once armature starts to spin it becomes.

A

A generator.

42
Q

Max voltage drop.

A

.2-.4v

43
Q

System voltage

A

3%

44
Q

4 internal tests.

A

Open, ground, short, high resistance

45
Q

3 sections of starter.

A

Commutator end housing.
Main frame housing.
Drive end housing.

46
Q

Which direction does the armature rotate?

A

Counter clockwise

47
Q

What is a brake washer for?

A

Helps slow down armature between cranking.

48
Q

Too much amps?

A

Mechanical problem

49
Q

Too much resistance?

A

Electrical problem.

50
Q

What does a starter do?

A

Provides a way to rotate the engine to ignite fuel.

51
Q

Mag switch is closed by?

A

Electromagnetic force, when it makes contact.

Starters (1 decks)

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