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