Chapter 18 Study Guide Starting and Traction Motor Systems

Solenoid

A _________ is an electromagnetic device that uses the movement of the plunger to exert a pulling or holding force

True

A battery should be checked and charged as needed before performing any starting system tests.

B only

A cranking current test, and the amperage is found to be less than specification. Technician a says the starter is bad and it should be replaced. Technician B insist on testing the resistance of the cables, grounds, and connections. Who's correct?

Six

A starter motor can have as many as brushes.

Relay

All positive engagement starters use an ____________ sincerely's between the battery and the starter motor

Neither

An engine crank slowly. Technician a says a possible cause of the problem is low resistance in the starter circuit connections. Technician B says a possible causes is an opening in the starter field coil circuit. Who's correct.

True

An engine may crank very slowly or may not start in cold weather if the wrong weight motor oil is used.

Traction and electric motors

Asynchronous and synchronous are types of

False

Cranking problems can be created if oversize battery cables are installed.

Loose starter motor mounting bolts, Poor battery ground terminal post connector, damage battery ground cable, ALL ANSWERS ARE CORRECT

If a ground circuit test reveals a voltage drop okay more than 0.2 V, the problem may be a ?

Replaced

If flywheel ring gear teeth are worn, the ring gear should be ________

Traction

In a hybrid vehicle the electric motor that is used to power the vehicle is called

Armature

Is the rotating component of the starter

True

Most starter motors have two to six brushes.

Inductive pick up

Nearly all starter system current testers (VAT) use an _______________ type ammeter to measure current draw

Starter motor

On a vehicle equipped with a starter relay, there are two positive battery cables. One connects battery positive battery terminal to the relay . the second connects to the ________________.

False

Permanent magnet starting motors use strong magnets surrounded by field coils to produce extra turning torque.

True

Poor or incomplete diagnosis accounts for the fact that nearly 80% of starters returned as defective on warranty claims work perfectly when tested.

Shims

Some starter use ________ between the starter and the mounting pad to allow for proper Clearance between the drive pinon gear and the flywheel ring gear

True

Some starters use planetary gear sets for gear reduction

A only

Technician a says the starter solenoid mounts directly on top the starter motor. Technician B says the starter solenoid pushes the Starter Dr., Pinion into the mesh with the fly wheel teeth

Windings

The Armature has two main components: the Armature ________ and the commutator

Overrunning clutch

The device that prevents the engine from turning the armature of the starter motor is the

True

The electric motor in a hybrid vehicle can act as a generator when its power is not needed.

Brushes, commutator

The field coils connected in series with the Armature winding through the starter _________ , ______________.

Series, shunt parallel , series shunt , ALL ANSWERS ARE CORRECT

The field coils in the starter motor are connected in

True

The gear ratio between the starter pinion gear and flywheel teeth provides an increase in torque and a reduction in speed (rpm)

Commutator

The part of Armature Armature that the brushes ride on is called the

False

The starter circuit requires strong voltage, but actual current flow is low.

Pinion

The starter drive_________ gear teeth messed with the flywheel ring gear teeth

Overrunning

The starter motor ___________ clutch should rotate smoothly in one direction and lock in the other

True

The starter motor converts electrical current into torque or twisting force through the integration of magnetic fields.

False

The starter must never operate for more than sixty seconds at a time and should rest for two minutes between extended cranking.

True

The starter safety switch on a vehicle with an automatic transmission is typically located on the transmission housing.

Ignition

The starter system has to separate electrical circuits: the starter circuit,_____________circuit

9.6 volts

The usual minimum cranking voltage specification is?

True

When a cranking voltage test is performed, the ignition system must be disabled.

A defective starter Drive

When the starter spends but does not crank the engine, which of the following may be a cause?

Corroded battery cables

Which of the following could result in the hard starting condition

Ignition switch

Which of the following is not part of the starter circuit

Ballast resistor

Which of the following is not part of the starter control circuit

Insulated circuit resistant test

Which of the following tests would be performed to check for high resistance in the positive battery cable.

Normal resistance in the positive battery cable

While the engine is cranked, A voltmeter placed between positive battery post and the positive posts of the starter reads less than .01 volts. The cause of this reading could be