Starter and Alternator Test

In the test being performed in the illustration below. What is the maximum specification allowed? 0.1 volts 0.2 volts 0.5 volts 1.0 volts

.2 volts

The voltage drop on the insulated side of the starter motor circuit should be no more than. battery voltage .1 volt .2 volt .5 volt

.5 volts

The ratio between the number of teeth on the starter motor pinion gear and the engine flywheel is about. 1 to 1 1 to 5 1 to 20 1 to 50

1 to 50

if the charging system is below the rated output, the technician should next test the: ground-circuit resistance insulated-circuit resistance alternator output (full-Field test) none of the above

alternator output (full-field test)

When performing an charging system output test using a VAT-40 load tester, the engine RPM should be: Idle RPM 2000 RPM 4000 RPM Wide open throttle

2000 RPM

While testing an alternator with an oscilloscope and the waveform appears as shown below. What would this indicate? normal condition a problem withe the regulator's switching transisitor a problem with the diodes a problem with the stator

A problem with the diodes

An A-type (grounded-Regulator) charging system is full-fielded by connection a jumper wire from the: 'F' terminal of the regulator to battery positive terminal alternator 'F' terminal to ground battery positive terminal to ground battery positive terminal tot he alternator battery terminal

Alternator 'F' terminal to ground

the rotor's field current is controlled to regulate alternator output current diode voltage stator resistance none of the above

Alternator output current

A test light shows that voltage is not being applied to a starter solenoid "S" terminal with the ignition switch turned to the start position. Technician A says the ignition switch could be bad. Technician B says the neutral safety switch could be bad. Who is Correct? technician A only Technician B only Both technician A and technician B Neither Technician A nor Technician B

Both Technician A and Technician B

A starter on a vehicle is to be tested for current draw while cranking the engine. Technician "A" says the battery's state-of-charge and capacity must be tested before a valid starter test can be performed. Technician "B" says that if a battery has less than a 75% charge (specific gravity 1.230 or less) it cannot be used for a starter current draw test. Who is correct? Technician A only Technician B only Bother Technicians A and B Neither Technicians A nor B

Both technicians A and B

When testing the starting system on a vehicle with a six-cylinder engine, you find that the engine cranks slowly, the starter current draw is 80 amps, and the battery voltage during cranking is 11.5 volts. What should you do next? check the voltage drop of the starter motor circuit test the battery capacity replace the starter motor check the engine

Check the voltage drop of the starter motor circuit.

A clutch safety switch is: located in the motor feed circuit closed when the clutch pedal is pressed all the way to the floor in series with the control circuit both b and c

Closed when the clutch pedal is pressed all the way to the floor and in series with the control circuit

The basic purpose of the overrunning clutch in the starter drive is to: assist the solenoid during cranking pull the starter pinion gear out of mesh disengage the armature when the engine starts keep the hold-in winding energized during cranking

Disengage the armature when the engine starts.

The voltage regulator directly controls: field current output current stator circuit rectification

Field current

The magnetic field required for starting motor operation is provided by the: armature assembly field-winding assembly solenoid none of the above

Field winding assembly

During an alternator output test, you find that the output is zero amps and the voltage is 12 volts. Your next step should be to: replace the regulator full-field (alternator output test) the alternator and check the readings remove the alternator for bench testing test the battery

Full-field (Alternator output test) the alternator and check the readings.

All of the following can cause noisy starter motor operation except: misalignment of the starter motor worn bushings grounded armature damaged or worn flywheel ring gear

Grounded armature

Cranking circuit voltage drop tests are used to locate: high resistance bad starter drive units weak batteries a short in the starter motor

High resistance

High resistance in an alternator output circuit is often caused by? a discharged battery a shorted diode loose or corroded connections a bad regulator

Loose or corroded connections.

A basic starter control circuit energizes the magnetic switch through the ignition switch and the: solenoid neutral start switch starter over-running clutch regulator

Neutral start switch

The alternator brush rides on a: slip ring commutator rotor diode

Slip ring

The small (S) terminal on the starting-motor solenoid is connected to the: starter control circuit starter load (battery) circuit both a and b both neither a nor b

Starter control circuit.

When checking the starting motor's insulation circuit the higher the voltage reading, the better the lower the voltage reading, the better both a and b neither a nor b

The lower the voltage reading, the better

An open fault in the hold-in winding of a starter solenoid switch will most likely cause: the battery to run down the solenoid to move in and out, or chatter the starter drive to remain engaged after the engine is running excessively high current draw from the starter

The solenoid to move in and out, or chatter.

If the starter spins but does not crank the engine, the likely cause would be: a bad overrunning clutch a bad solenoid high resistance in the motor feed circuit high resistance in the motor control circuit

a bad overrunning clutch

When the starting motor will not crank the engine or cranks it too slowly, the first thing to check is the: battery wiring and cables solenoid starting motor

battery

A solenoid uses two coils. Their windings are called: push-in and pull-out pull-in and push-out push-in and hold-out pull-in and hold-in

pull-in and hold-in

In an alternator, alternating current is converted to direct current by the: Stator brushes rectifier regulator

rectifier

With the engine cranking, a 4-volt drop is measured across the starter insulated (B+) battery cable. What should be done? nothing, this voltage drop is acceptable install a larger battery replace the cable or clean and tighten the connection charge the battery

replace the cable or clean and tighten the connection

The magnetic field in an alternator is developed in the: stator rotor armature none of the above

rotor

A starter current draw test indicates lower than specified cranking speed and current. The next step is: replace the starter solenoid, it is defective run a voltage drop test of B+ and ground cables test the battery to use the 9.6 volt drop test for a tight engine

run a voltage drop test of B+ and ground cables

A charging system has failed a system test (5 amps @ 12.7 volts). An alternator output full field test is performed. The technician finds that the alternator output is now within 10% of its rated output. Therefore: the regulator is defective the alternator is defective a wiring problem exists both regulator and the alternator are defective

the regulator is defective

When performing a charging system output test using a VAT-40 load tester, to test current output the battery should be loaded: to no less than 13.0 volts to no less than 12.0 volts to no less than 11.0 volts to no less than 9.6 volts

to no less than 12.0 volts

If a conductor is moved through a magnetic field: heat is created voltage is created the magnetic field is increased the magnetic field is decreased

voltage is created

A charging system is being discussed: An engine in run at 2000 RPM, the headlights highbeams are ON and the blower fan is set to high speed. Current is being measured at the alternator output wire and voltage is measured at the battery. Specifications: Alternator 70 amps and no lower than 14.1 to 14.9 Technician A says alternator output current should be above 30 amps and the voltmeter should read between 14.1 and 14.9. Technician B says this is too low and the alternator should be 70 amps and no lower than 14.1. who is correct? Technician A only Technician B only both technicians A and B neither Technicians A nor B

Technician A only

A vehicle failed a charging system output test. Technician A says if you supply full-fielded current to the alternator, and the charging voltage and current increases to normal levels, you usually have a bad regulator. Technician B says some alternators can be full-fielded by grounding the alternator output battery terminal. Who is correct? Technician A only Technician B only both Technician A and Technician B neither Technician A and Technician B

Technician A only

A charging system output test for a 70 amp alternator indicates a 64 amp output. Technician A says that an alternator output (full field) test should be performed to determine what component should be replaced. Technician B says the output is sufficient and nothing needs to be done. Who is correct? technician A technician B both A and B neither A nor B

Technician B

A rectifier bridge is being tested with a DVOM is set to 'DIODE CHECK'. One lead is connected to a diode lead and the other lead is connected to the diode housing. The connections are then reversed and both readings noted. One reading is 'OL' and the other is .5v. Technician A says that the diode is shorted. Technician B says that this is a normal indication. Who is correct? Technician A Technician B both A and B neither A nor B

Technician B

Technician A says a higher than normal charging system voltage is usually caused by a defective alternator rectifier diode. Technician B says a defective battery can affect on the charging system. Technician A only Technician B only both Technicians A and B neither Technicians A nor B

Technician B only

A battery that is overcharged can be due to: loose alternator drive belt defective regulator high speed driving high resistance in the field circuit

defective regulator

If the engine cranks too slow to start, the problem may be caused by: engine problems a faulty neutral start switch an open relay in the control circuit a damaged pinion gear

engine problems

When performing a starter current draw test, high current draw usually indicates: a discharged battery high resistance battery terminal corrosion engine problems or a bad starter

engine problems or a bad starter

The purpose of the alternator stator is to: change alternating current to direct current have voltage induced in its windings build up a strong magnetic field conduct the field current

have voltage induced in its windings

When most of the electrical accessories are turned on, the electrical system will demand (need): lower alternator output higher alternator output both A and B neither A nor B

higher alternator output

when the input voltage to a regulator decreases, the alternator output voltage should normally: increase decrease remain the same turn ON the charging lamp indicator

increase