chapter 52-53

Permanent magnets are commonly used for what part of the starter

Field coils

The brushes are used to transfer electrical power between what

Field coils and the armature

What component or circuit can keep the engine from cranking

Ignition switch, solenoid, antitheft

Series wound electric motors produce what

Maximum power at 0 rpm

Technician A says that the diodes regulate the alternator output voltage technician B says that the field current can be computer controlled which technician is correct

Neither technician A or B

_____________________ is not effective until current flows, measuring the voltage drop

resistance

A V-6 is being checked for starter amperage draw the initial surge current was about 210 A and about 160 A during cranking. technician A says the starter is defective and should be replaced because the current flow exceeds 200 A , technician B says this is a normal current draw for a starter motor on a V-6 engine which technician is correct

technician B

if a cable or connection is __________ to the touch there is electrical resistance in the cable or connection

warm

An alternator diode it is being tested using a digital multi meter set to the diode check position .a good diode will read what if the leads are connected one way across the diode and what if the leads are reversed

0.551/OL

How much current flows through the alternator brushes

10 to 15 A

An acceptable charging circuit voltage on a 12 V system is what

13.5 to 15 V

A starter motor rotates about how many times faster than the engine

18 times

Normal cranking speed of the engine is about

200 rpm's

Voltage regulator controls current through the what

Alternator brushes

The growler is used to test what starter component

Amateur

Starter motors operate on what principle

Armatures rotates from a strong magnetic field for a weaker magnetic field

And alternator could test as producing lower than normal output yet be OK if what

Battery is weak or defective, engine speed is not high enough during testing , and drive belt is loose or slipping

The neutral safety switch is located where

Between the ignition switch and the starter solenoid

Two technicians are discussing what could be the cause of slow cranking and excessive current draw technician A says that an engine mechanical fault could be the cause technician B says the starter motor could be binding or defective which technician is correct

Both technician A and B

voltage drop testing of the wire involves connecting a voltmeter set to read ______ volts to the suspected high resistance cable ends and cranking the engine

DC

To check the charging voltage connect a digital multi meter to the positive and the negative terminal of the battery and select what

DC volts

When testing an ohmmeter rotor if and om meter shows 0 ohms with 1 m lead attached to the slip rings and the other meter lead touching the rotor shaft the rotor is what

Defective shorted to ground

A magnetic field is created in the where in the alternator

Rotor

Alternator brushes are constructed from what

Silver copper alloy

Which unit contains a hold in whining in a pole and winding

Starter solenoid

The alternator output current is produced where

Stator

A technician connects one lead of a digital voltmeter to the positive terminal of the battery and the other meter lead to the battery terminal of the starter solenoid and then crank the engine . during cranking the voltmeter displays a reading of 878 mV technician A says that this reading indicates that the positive battery cable has to high resistance. technician B says that the reading indicates that the starter is the defective, which technician is correct

Technician A

A vehicle equipped with a V-8 engine does not crank fast enough to start . technician A says the battery could be discharged or defective technician B says the negative cable could be loose battery which technician is correct

Technician A and B

Technician A says that a discharge battery lower than normal battery voltage can cause solenoid clicking .technician B says that a discharge battery or dirty corroded battery can cause solenoid clicking, which technician is correct

Technician A and B

Technician A says that a voltage drop test of the charging circuit should only be performed when current is flowing through the circuit technician B says to connect the leaves of a voltmeter to the positive and negative terminals of the battery to measure the voltage drop of the charging system which technician is right

Technician A only

Technician A says that an alternator overrunning pulley is used to reduce vibration and noise technician B says that an over running alternator pulley or dampener uses a one way clutch which technician is right

Technician A only

Technician A says that the computer can be used to control the output of the alternator by controlling the field current technician B says that the voltage regulators control the alternator output by controlling the field current router which technician is correct

Technician A only

Technician A says that the two diodes are required for each stator winding lead technician B says that diodes change alternating current into direct current which technician is correct

Technician A only

Technician A says that a defective solenoid can cause a starter whine technician B says that a defective starter drive can cause a starter whining noise which technician is correct

Technician B

Technician a says that a wye- wound stator produces more maximum output then the same alternator equipped with the Delta wound stator. technician B says that an alternator equipped with a delta wound stator produces more maximum output in a wye-wound stator. which technician is correct

Technician B only

The maximum allowable alternating current in amps that is being sent to the battery from the alternator is what

Ten% of the rated output of the alternator

Foster a starter motor rotates the what

The less current it draws from the battery

If the clearance between the starter Pinion and the engine flywheel is too great

The starter will produce a high-pitched whine during cranking

Why should the lights be turned on when checking for the ripple voltage are alternating current from the alternator

To create an electrical load for the alternator

Operating an alternator in a vehicle with a defective battery can harm what

Voltage regulator

Bench testing of a starter should be done when

after reassembling an old starter and before installing a new starter

So cranking by the starter can be caused by all except

an open neutral safety switch

inside the field coils is an __________________ that is supported with either bushings or ball bearings at both ends which make it rotate

armature

motor has only an ________________ circuit

armature

brushes are made of

copper and carbon

2 poles wrapped with copper wire in one direction to create a north pole magnet and 2 wrapped in the opposite direction to create south pole magnet and when energized create strong magnetic fields inside the starter

field coils

to compensate for the lack in torque all PM starters use ____________________ ti multiply starter motor torque

gear reduction

gear reduction in starters is used to

increase starter motor speed and provide the torque multiplication necessary to crank an engine

what protects the starter motor from damage if the ignition switch is held in the start position after the engine starts?

overrunning clutch

___________________are used in place of the electromagnetic field coils and pole shoes in many starters today. eliminates the motor field circuit, which also eliminates the potential for field coil faults and other electrical problems.

permanent magnets

soft iron cores are called

pole shoes