Electrical Test 3 (ch. 17,19)
c. 2 brushes supply power & 2 brushes provide a return to ground
Choose the correct statement regarding a starter motor that utilizes 4 brushes a. 1 brush supplies power & 3 brushes provide a return to ground b. 3 brushes supply power & 1 brush provides a return to ground c. 2 brushes supply power & 2 brushes provide a return to ground
a. Solid iron core
Starter armatures are comprised of what type of design? a. Solid iron core b. Several thin iron stampings laminated together c. Solid copper core
b. 1912
Starters were first used in what year (on a Cadillac) a. 1902 b. 1912 c. 1922 d. 1932
a. 2 to 5 amperes
19. What is an average range of current flow through an alternator's ROTOR? a. 2 to 5 amperes b. 5-10 amperes c. 10-20 amperes d. 60-100 amperes
d. 10 AC amperes
A 100 amp alternator is being checked for AC current ripple, what is the maximum allowable AC current ripple? a. 1 AC amperes b. 5 AC amperes c. 8 AC amperes d. 10 AC amperes
b. 2 HP
A 100 ampere alternator requires approximately how much engine horsepower? a. 0.5 HP b. 2 HP c. 5 HP d. 10 HP e. 20 HP
d. 12V
A technician is using a voltmeter and is measuring across the starter's solenoid terminals M and the battery's ground terminal while the engine is cranking. Which one of the following readings should a technician expect to read on the voltmeter if the starter is operating correctly? a. O.L. b. 0.2 V c. 1.2 V d. 12V
c. Bad starter armature (grounded)
A technician is using an ohmmeter to test a starters armature. Continuity exists when testing. What does this mean? a. Open starter armature b. Good starter armature c. Bad starter armature (grounded)
Both tech A and B
A technician is watching the headlights while cranking the engine. The headlights do not dim and the engine fails to crank. Technician A states that the starter control circuit may have an open. Technician B states that the starter motor may be locked up. Who is correct?
a. 400 engine RPM
A vehicle equipped with a computer controlled starting circuit typically requires all of the following conditions to be met BEFORE it will CRANK the engine EXCEPT which ONE? a. 400 engine RPM b. Brake pedal is depressed c. Gear selector in neutral d. Key fob in the vehicle
Technician B
A vehicle's starter motor is being questioned if it needs replaced. The starter motor will crank, however the engine cranks slower than normal. Technician A states that the starter motor's solenoid may have an open solenoid winding. Technician B states that solenoid is operating if the engine cranks. Who is correct?
a. Practically no alternator output
An alternator's field has no current flow, what is occurring? Choose the one best answer a. Practically no alternator output b. Maximum alternator output c. Alternator output still depends upon RPM
c. 6
An alternator's rotor that contains 12 poles/fingers will have how many North poles? a. 2 b. 4 c. 6 d. 12
c. Each pole piece will be designated as EITHER North OR South pole
An alternator's rotor will contain two pole pieces. Choose the ONE correct ANSWER about the pole piece a. The piece will have both North and South Poles b. Each piece will contain a minimum of 14 fingers c. Each pole piece will be designated as EITHER North OR South pole d. Pole pieces are made of aluminum to save on weight
d. 200 amps
An automotive starter solenoid can require how high of amperage just to energize the solenoid's windings and pull in the solenoid's plunger? a. 25 amps b. 50 amps c. 100 amps d. 200 amps
a. Parallel
An electric motor that is called a "shunt style" has the field windings installed in what path with the armature? a. Parallel b. Series c. Neither
b. The conductor will move towards the weaker magnetic lines of force
If a current carrying conductor is placed between a North and South pole magnet, what will occur? a. The conductor will move towards the stronger magnetic lines of force b. The conductor will move towards the weaker magnetic lines of force c. The conductor will not move
a. Field circuit testing
Starters equipped with permanent magnets do not require which of the following? a. Field circuit testing b. Brush testing c. Commutator testing d. Armature testing
b. Same quantity
Starters motors must have how many brushes in comparison to the number of poles? a. Half as much b. Same quantity c. Twice the amount d. Three times the amount
Both tech A and B
Technician A states that a failed OAP can cause an alternator to NOT charge if it freewheels in both directions. Technician B states that failed OAP can cause an alternator to NOT charge if it is locked in both directions. Who is correct?
Tech A
Technician A states that a stator contains coil windings. Technician B states that the rotor contains a coil winding. Who is correct?
Both tech A and B
Technician A states that an alternator's voltage regulator can cycle 10 times per second. Technician B states that an alternator's voltage regulator can cycle as much as 7,000 times per second. Who is correct?
Both A and B
Technician A states that an automotive starter solenoid will ground the hold-in solenoid winding via the solenoid case. Technician B states that a heavy duty diesel starter solenoid will ground the hold-in winding externally through an external wire (grounding strap). Who is correct?
Both tech A and B
Technician A states that electro-magnet field coils have North poles wrapped in one specific direction. Technician B states that South pole coils are wrapped in the opposite direction of the North pole coils. Who is correct?
Tech A
Technician A states that gear-reduction starter motors typically use less starter amperage. Technician B states that gear reduction starter motors typically use larger diameter battery cables. Who is correct?
Technician B
Technician A states that the armature is the stationary component within a starter motor. Technician B states that the commutator is a series of conducting elements located on one end of the armature. Who is correct?
c. Contact disk connects terminals B+ and M
When a starter's solenoid is energized and after the plunger has completely 'pulled-in' what occurs within the solenoid in terms of wire terminals? a. Contact disk connects terminals S and B+ b. Contact disk connects terminals S and M c. Contact disk connects terminals B+ and M d. Contact disk opens the connection between terminals S and B+ e. Contact disk opens the connection between terminals S and M ab. Contact disk opens the connection between terminals B+ and M
d. Battery, brush, slip ring, rotor winding, slip ring, brush
Which of the following power flows listed below describes the correct order of electricity flowing through an alternator's rotor? a. Battery, slip ring, brush, rotor winding, brush, slip ring b. Battery, winding, brush, slip ring, brush, slip ring c. Battery, slip ring, brush, slip ring, brush, winding d. Battery, brush, slip ring, rotor winding, slip ring, brush
a. Bendix
Which of the following types of starters is no longer used in production and works on the principle of inertia, with the pinion meshing with the ring gear due to the inertia of the armature rotation? a. Bendix b. Permanent-magnet/planetary c. Solenoid-actuated/reduction drive d. Solenoid-actuated/ direct drive
a. Stator
Which one of the following components within an alternator is known as the current carrying CONDUCTOR(S) that generates electricity (as a magnetic field is spun past the conductor)? Choose the single ONE best answer a. Stator b. Slip ring c. Brush d. Rotor
b. Diode trio
Which one of the following is sometimes used in an alternator in order to direct voltage from the stator windings for the purpose of powering the alternator's FIELD? a. Diode rectifier bridge b. Diode trio c. Armature d. Pole shoe
a. Rectify
Which one of the following terms is used to describe an alternator diode that converts AC to DC? a. Rectify b. Excite
b. Excite
Which one of the following terms is used to describe an alternator diode that turns on an alternators field? a. Rectify b. Excite
c. 8 cylinder gas engine
Which one of the following types of engines typically requires a starter-amperage of 225 amps to crank an engine? a. 4 cylinder gas engine b. 6 cylinder gas engine c. 8 cylinder gas engine d. Diesel engine
b. Delta
Which style of stator winding has CURRENT FLOWING in parallel? a. Y b. Delta c. S d. L
a. Y
Which style of stator winding has CURRENT FLOWING in series? a. Y b. Delta c. S d. L
b. Delta
Which style of stator winding is wired in a triangle? a. Y b. Delta c. S d. L
b. Delta
Which style of stator winding produces the highest amount of amperage? a. Y b. Delta c. S d. L
b. Delta
Which style of stator winding requires higher RPM (meaning that it does not perform well at low RPMs) a. Y b. Delta c. S d. L
c. Ampere-turns
The magnetic field strength of a coiled conductor is often expressed in units of? a. Ampere-lines b. Magnetic flux lines c. Ampere-turns d. Gauss Gauge
c. Damage Battery
A charging system that is charging at too high of voltage will? a. Help a battery b. Have no effect on a battery c. Damage battery
d. High circuit resistance
A starter motor amperage test is being conducted and results in a reading that is too high. Which ONE of the following will NOT cause too high of an amperage draw test? a. Bound engine b. Shorted starter motor windings c. Worn starter bushings d. High circuit resistance
d. Pull in and hold in
A starter motor solenoid uses two coils. They are called? a. Push-in and pull out b. pull in and push out c. Push in and hold out d. Pull in and hold in
b. Pole shoe
A starter that utilizes electro-magnet field coils has heavy copper or aluminum wire wrapped around a soft-iron core. What is another name for this soft-iron core? a. Pole foot b. Pole shoe c. Pole elbow d. Pole knee e. Pole hand
a. Faulty neutral switch
A starter will not crank under normal circumstances. A technician uses a jumper cable to jump from the battery's positive terminal to the solenoid's "S" terminal and then the engine will crank. Which ONE of the following is MOST likely at fault? a. Faulty neutral switch b. Open field winding c. Bad solenoid winding d. Bad commutator or brush
c. The solenoid is at fault
A starter will not crank. A technician uses jumper cable to jump across the battery's positive terminal and the starter's M terminal. The test results in the starter motor spinning but the starter's pinion gear will not engage the flywheel. Choose the ONE correct statement. a. The field windings are open b. An open exists between the brushes and the commutator c. The solenoid is at fault d. The starter motor's bearings are binding e. The commutator is shorted to ground
b. Torque
A starter's rotational force is measure in what? a. Current b. Torque c. Ampere-turns d. Ampere-lines e. Magnetic flux lines
c. Installed a different rotor in the new alternator
A technician is attempting to use two failed alternators ( one from the car and another off of the shelf) to make one good operational alternator. The car's original alternator delivered 100 amperes. After assembling the alternator, he notices that the battery charges much faster than the previous alternator (too much amperage). What most likely occurred during the rebuild process? a. Installed a smaller stator winding b. Installed a stator with fewer windings c. Installed a different rotor in the new alternator d. Accidentally grounded the alternator to the mounting bracket
b. 0.2 V
A technician is using a voltmeter and is measuring across the starter's solenoid terminals B+ and M while the engine is cranking. Which of the following should a technician expect to read on the voltmeter if the starter is operating correctly? a. O.L. b. 0.2 V c. 1.2 V d. 12 V
c. Three
An alternator produces how many phases of alternating current that must be rectified? a. One b. Two c. Three d. Four
c. 400 RPM
According to the textbook at what RPM does the PCM recognize that the engine has started? a. 100 RPM b. 200 RPM c. 400 RPM d. 600 RPM e. 800 RPM
a. 200 feet
According to the textbook, RVS allows a driver to start an engine while inside a building at a distance of approximately? a. 200 feet b. 400 feet c. 600 feet d. 800 feet e. 1000 feet
d. The starter solenoid receives 12 volts at the S terminal
After the driver releases the key switch from the "start position", which ONE of the following DOES NOT occur? a. Voltage is no longer supplied to the solenoid winding(s) b. The solenoid return spring causes the plunger to return to its neutral position c. Contact disk opens opens the connection between the B and M terminals d. The starter solenoid receives 12 volts at the S terminal
d. Reverse switch
All of the following are used starter control circuits EXCEPT which ONE of the following? a. Automatic transmission neutral safety switch b. Manual transmission clutch switch c. Ignition switch d. Reverse switch e. Brake pedal switch
c. 2 to 3 times faster
Alternators typically rotate at what speed relationship to engine speed? a. Same speed b. 2 to 3 times slower c. 2 to 3 times faster d. 4 to 5 times slower e. 4 to 5 times faster
b. The pull-in winding receives voltage on both sides of the winding
As a starter begins cranking the engine, the amperage from the pull-in winding will no longer energize the pull-in winding, but instead the remaining available amperage is sent to the crank starter. What takes place within the starter's solenoid so that the pull-in winding is no longer energized while the starter is cranking? a. An internal switch opens within the solenoid b. The pull-in winding receives voltage on both sides of the winding c. The plunger movement opens the pull-in winding's contact d. The "S" terminal removes voltage from the pull-in winding
c. Late model starters that will not crank should be diagnosed by tapping on the case with a hammer
Considering late model starters, which of the following is NOT a correct statement? a. Late model starters can be designed with permanent magnets b. Late model starters can be designed to use smaller diameter battery cables c. Late model starters that will not crank should be diagnosed by tapping on the case with a hammer d. Late model starters may not use field coils.
d. Permanent Magnet
Considering the different styles of electric motor (when used as a starter motor) typically requires a gear reduction? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
b. Series
Considering the different styles of electric motors that utilizes "field windings", which one of the following can be designed as a starter motor to produce high torque (at 0 RPM) and does not require any gear reduction? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
a. Shunt
Considering the different styles of electric motors that utilizes "field windings", which one of the following is more commonly used in places other than car starters, such as wiper motors? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
c. Compound
Considering the different styles of electric motors that utilizes 'field windings', which one of the following can be designed as a starter motor that produces high torque and constant speed? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
e. Both A and D
Considering the different styles of electric motors which motor maintains a constant field strength? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
a. Electrical current and magnetic forces cause an armature to rotate
How does a starter convert electrical energy to mechanical energy? a.Electrical current and ,magnetic forces cause an armature to rotate b. Electrical energy is used to create heat and the heat is used to create torque c. Magnetic lines of force are used to develop electrical current
b. 746 watts
How many watts will make 1 horsepower? a. 500 watts b. 746 watts c. 1500 watts d. 2100 watts
b. Two
In a Wye-type stator winding, whenever current is flowing through the winding(s), how many windings must be connected together in order for the current to flow? a. One b. Two c. Three d. Four e. Five
Both Tech A and B
Regarding starter motor brushes, Technician A states that starter motors contain insulated brushes that are insulated from the housing. Technician B states that starter motors contain brushes that use stranded copper wire connections that are not insulated and connected directly to the field housing or brush end housing. Who is correct?
a. Move the pinion gear into mesh with the flywheel's ring gear
Regarding the "remote starter solenoids", which ONE of the following tasks will the remote solenoid NOT perform? a.Move the pinion gear into mesh with the flywheel's ring gear b. Supply full battery voltage to the starter motor c. Supply voltage to the solenoid windings d. On older vehicles provide an alternate path for current to the ignition coil during cranking
b. 12-14
Typical alternators have how many poles? a. 4-6 b. 12-14 c. 16-20 d. 24-36
a. diode rectifier bridge
Which of the following has the responsibility of converting AC voltage from the stator windings into 12 volts DC? a. Diode rectifier bridge b. Diode trio c. Voltage regulator d. Pole shoe
b. Ground side brush
Voltage regulator's often control the alternator's field via what component? a. Power side brush b. Ground side brush c. Stator ground wire d. Stator power wire
b. Ground side
Voltage regulators most commonly control what side of the field current? a. Power side b. Ground side
d. One-way clutch
What component within a starter motor prevents damage from occurring whenever the engine starts running (at a faster speed than the starter motor is rotating) a. Brushes b. Commutator c. Field windings d. One-way clutch e. Armature
e. Six
What is a common number of diodes located in an alternator's RECTIFIER? a. one b. two c. three d. four e. six
b. 500 millivolts
What is a maximum specification for measuring an alternators AC voltage ripple? a. 250 millivolts b. 500 millivolts c. 750 millivolts d. 1 volt
c. 100 to 250 RPM
What is a normal engine cranking speed? a. 50 to 150 RPM b. 100 to 250 RPM c. 250 to 500 RPM d. 500 to 750 RPM
b. 0.015"
What is a typical air gap between an alternator's rotor and stator? a. 0.005" b. 0.015" c. 0.030" d. 0.060"
d. Sine wave pattern
What is another name used to describe the alternating current generated within an alternator? a. Checkered pattern b. Bow pattern c. Triangle pattern d. Sine wave pattern
a. 10% of alternator output
What is the maximum allowable AC current ripple for an alternator? a. 10% of alternator output b. 20% of alternator output c. 30% of alternator output d. 40% of alternator output e. 50% of alternator output
d. Permanent Magnet
What is the most common style of starter motor today? a. Shunt b. Series c. Compound d. Permanent magnet e. Both A and D
b. Eliminate noise/vibration
What is the primary purpose why manufacturers install Overrunning Alternator Pulley's (OAP) on charging systems? a. Saves HP b. Eliminate noise/vibration c. Increases charging voltage d. Reduce weight
b. Two solenoid plunger windings are energized
When a starter's solenoid is energized and after the plunger has completely 'pulled-in' what occurs within the solenoid in terms of the winding(s)? a. One solenoid plunger winding is energized b. Two solenoid plunger windings are energized c. Three solenoid plunger windings are energized d. Four solenoid plunger windings are energized
c. 75%
When checking the performance of a charging system, what is the minimum level of battery charge that is required? a. 25% b. 50% c. 75% d. 100%
c. Bad battery
When diagnosing an engine that will not crank, what is most likely at fault if the voltage drops below 9.6V and the amperage is also too low? a. Bound engine b. High circuit resistance c. Bad battery
b. Low ambient temperatures
When does a battery require higher charging voltage? a. High ambient temperatures b. Low ambient temperatures c. Temperature has no effect
a. charging
When is an alternator's field "electrically-energized"? a. charging b. not charging c. always
a. S
When the ignition switch is turned to the start position, which terminal is the ignition switch energizing on the starter solenoid? a. S b. B+ c. M d. R
a. One solenoid plunger winding is energized
When the key switch sends 12 volts to the starter solenoid, which of the following occurs? Choose the ONE correct answer. a. One solenoid plunger winding is energized b. Two solenoid plunger windings are energized c. Three solenoid plunger windings are energized d. Four solenoid plunger windings are energized
c. Hat
Which ONE of the following is NOT a 'winding design' used in starter motor armatures? a. Lap b. Wave c. Hat
c. Synthetic motor oil
Which ONE of the following is not a method used for cooling an alternator? a. External fan b. Internal fan c. Synthetic motor oil d. Engine coolant
b. Engine must be cranking
Which ONE of the following must occur in order to conduct starter voltage drop testing? a. Ignition switch turned to the RUN position b. Engine must be cranking c. Ignition must be enabled d. DVOM must be set to resistance
d. Increase the armature's resistance
Which ONE of the following will NOT increase a starter motor's torque? a. Increases magnets strength b. Increased current c. Increase the number of turns of wire on the magnets d. Increase the armature's resistance
d. Converts DC to AC
Which of the following answers is NOT correct regarding an alternator's "Rectifier Bridge"? a. Contains diodes b. contains connections to the stator's windings c. Connected to the voltage regulator d. Converts DC to AC
a. Thermistor
Which of the following components is found within an alternator's voltage regulator circuit and is used to compensate for changes in temperature? a. Thermistor b. Rectifier c. Diode trio d. Zener diode
d. Rotor
Which of the following components is responsible for generating a magnetic field inside of an alternator? a. Stator b. Diode trio c. Rectifier bridge d. Rotor
c. Stator
Which of the following components within an alternator does not rotate? a. Slip rings b. Rotor c. Stator
d. Normal reading
With the key off, a technician is using an ohmmeter with the red lead on the starter's M terminal and the black lead on the battery's ground terminal. The meter reads 0.2 ohms. What does this mean? a. The commutator is shorted to the field windings b. The commutator is shorted to ground c. There is an open between the brushes and the commutator d. Normal reading
d. Zener diode
Within a voltage regulator what is the name of the component that has the responsibility to open-up a path to allow the current to flow whenever the alternator's field winding no longer needs energized? a. Rectifier b. Diode trio c. Resistor d. Zener diode
c. One positive and one negative
Within an alternator, each one of the stator's windings must have a minimum of how many diodes? a. One positive b. One negative c. One positive and one negative d. Two positive and two negative e. Three positive and three neagtive
b. Rotor
Within an alternator, which of the following has field current flowing through it? a. Stator b. Rotor c. Armature d. Pole shoes
a. Commutators
Within starter motors the brushes ride upon what? a. Commutators b. Field windings c. Permanent magnets d. Pole shoes e. Bushings
