Font size
WorksheetsFINAL EXAMINATION IN AUTOMOTIVE ELECTRICITY 3A & 3J
Total questions: 65
Worksheet time: 50mins
Technician A says, the starting system includes a low current control circuit and high current motor circuit. Technician B says, the starting circuit includes a relay or solenoid switch and a safety switch. Who is right?
a A only
b B only
c niether A nor B
d both A & B
The stationary magnetic field in the starting motor is produced by the
a. field winding and permanent magnet
b. brushes and commutator
c. armature windings ang commutator bars
d. relay or solenoid
To start the engine, the starting motor rotates the crankshaft about
a. 3,000 rpm
b. 45,000 rpm
c. 50 rpm
d. 200 rpm
The overrunning clutch performs all the following EXCEPT
a. transmit cranking torque to the engine
b. damages the armature if it fails to lock
c. prevents the engine from driving the pinion
d. acts as one way clutch
If the engine cranks slowly but does not start, a possible cause is
a. a discharge battery
b. low temperature
c. driver has run-down the battery trying to start
d. all of the above
The ignition system controls the following jobs EXCEPT
a. controls the compression pressure
b. produces spark that jumps the spark plus gap
c. ignites the compressed air-fuel mixture
d. delivers spark at the proper time
The contact-point distributor has two major jobs
a. to advance and retard the spark
b. to distribute the high voltage surge and switch the current to the coil on and off
c. to distribute the battery voltage and switch the current to the sparkplug on and off
to provide centrifugal and vacuum advance
Technician A says, the spark occurs when the contact point open. Technician B says, the spark occurs the coil magnetic field collapses. Who is rigth?
a A only
b B only
c both A and B
d neither A nor B
technician A says, the height of line A-B in fig. 31-20 shows the voltage require to fire the sparkplug. technician B says, line A-B shows that the primary current has been cut off. Who is right ?
a A only
b B only
neither A nor B
d Both A and B
Technician A says, the line C-D in fig.31-20 shows the length of time the spark jumps the spark plug gap. Technician B says, the line C-D shows the voltage require to keep the spark jumping the plug gap. Who is right ?
a A only
b B only
c both A and B
d neither A nor B
Technician A says, line D-E in fig,31-20 shows the coil on time. Technician B says, line E-F shows the length of time current flows through the primary winding of the coil. Who is right ?
a A only
b B only
c both A and B
d neither A nor B
The device that provides spark advance by pushing the breaker cam ahead as engine speed increases is the
a vacuum advance mechanism
b throttle body
c primary resistance
d centrifugal advance mechanism
Maximum advance occurs
a at part throttle
b only after centrifugal advance reaches maximum
c at closed throttle
d at wide open throttle
Engine use resistor sparkplugs to
a increase secondary voltage
b reduce secondary current
c make starting easier
d reduce television and radio interference
The heat range of a sparkplug is primarily determined by
a the depth of electrode enter the combustion chamber
b the length of lower insulator
c the number of ribs in the upper insulator
d the gap between the electrodes
In the electronic ignition system the primary is opened and closed by
a Solenoid
b contact points
c mechanical switch
d an electronic switch
Rotation of the reluctor
a moves the magnetic field through the pick up coil
b trips the contact in the distributor
c controls secondary voltage
d limits vacuum advance
Technician A says, a Hall-effect switch uses the presence or absence of magnetic field to switch the supply voltage on and off. Technician B says, the Hall voltage switches on when the steel blade enters the air gap of a Hall-effect switch. Who is right ?
a A only
b B only
c neither A nor B
both A and B
Ignition system with electronic spark advance include an ECM that
a controls engine speed
b calculate spark advance
c feeds information to a series of sensors
d control centrifugal advance
Technician A says, a light from a photodiode can switch an LED on and off. Technician B says, a photo diode uses the presence or absence of of light to switch an applied voltage on and off. Who is right ?
a A only
b B only
c both A and B
d neither A nor B
All the following are true about distributorless ignition EXCEPT
a the ignition module and ECM work together in time, trigger, and distribute high voltage surge
b there are fewer moving parts, less radio interference, and increased spark timing accuracy
c the waste spark method fires two plugs, one on the intake stroke and one on the power stroke
d most of the spark energy is used to jump the sparkplug gap in the cylinder on compression
The alternator is a device for changing mechanical energy into _____ energy.
a potential
b thermal
c chemical
d electrical
Technician A believes that once an engine starts running, the engine crankshaft pulley powers the alternator to supply electricity to a car’s electrical systems. Technician B feels a battery is a car’s sole electrical supplier. Who is right?
a Technician A Only
b Technician B Only
c Both Technician A and B
d Neither Technician A nor B
An alternator _____ consists of field windings mounted on a shaft.
a stator
b rotor assembly
c rectifier bridge
d diode trio
Alternator brushes ride on _____ to feed current to the field windings.
a bearings
b fan teeth
c slip rings
d hair
The alternator _____ changes alternating current into direct current.
a transistor
b rectifier
c stator
d regulator
An alternator _____ consists of three groups of windings and produces the electrical output of the alternator.
a transistor
b rectifier
c stator
d regulator
Technician A says alternator rear bearings are frequently held in place with a small plate and screws. Technician B says alternator front bearings are usually press-fit. Who is right?
a Technician A Only
b Technician B Only
c Both Technician A and B
d Neither Technician A nor B
A voltage regulator controls alternator output by changing the amount of current flowing through the _____.
a field windings
b battery cable
c fuse box
d diode
The alternator current must be _____ into direct current before entering the vehicle’s electrical system.
a forward biased
b reverse biased
c rectified
d inverted
The voltage regulator keeps alternator output at a preset charging voltage of approximately _____ to _____ volts.
a 12-14
b 12-16
c 12.0-12.6
d 13-15
Alternator _____ and electrical _____ determine whether the regulator increases or decreases charging output.
a size, shape
b speed, load
c load, speed
d brand, strength
A _____ may be used to measure battery temperature so the charging system can alter charging output as needed.
a thermometer
b battery thermistor
c barometer
d widget
Which of the following is not a component of a typical 12-volt charging system?
a voltage regulator
b drive belt
c battery
d ignition switch
The component that is turned by the alternator drive belt and creates a rotating magnetic field is the:
a pulley
b rotor
c stator
d diode trio
To reduce alternator output, the voltage regulator places more resistance between the:
a battery and the field windings.
b rotor and the stator
c alternator pulley and the stator
d alternator brushes and slip rings
Which of the following is not a type of alternator belt?
a V.
b Ribbed
c Cogged V.
d Integrated.
Which of the following components do hybrid vehicles use to recharge the HV battery?
a Hybrid control module.
b Voltmeter
c HV power control module
d Motor-generator
Technician A says some overcharging is okay. Technician B says overcharging can result inbattery overheating. Who is right?
a Technician A Only
b Technician B Only
c Both Technician A and B
d Neither Technician A nor B
The _____ is an ammeter, voltmeter, or warning light that informs the driver of charging system condition.
a charge indicator
b DVOM
c tachometer
d resistor branch
The _____ is the percentage of time that current is fed to the alternator’s field windings.
a amperage rating
b duty cycle
c wattage
d I.D.10-T
Q. What is this?
(a)
Q. What is this?
(a)
Q. What is this?
(a)
Q.
What is this?
(a)
Q.
What is this?
(a)
Q. What is this?
(a)
Q. What type of ignition system is this?
a Conventional
b Distributor less
c Electronic
Q. What type of ignition system is this?
a Distributorless
b Conventional
c
Electronic
Q.
This is an electronic ignition system?
a
False
b True
Q. What is this?
(a)
Q.
What is this?
a
ground
b starter
c
key
d
solenoide
(a)
Q. What is this?
(a)
Q. What is the name of this process?
(a)
Q.
What is this?
a starter
b condenser
c voltage regulator
d relay
Q. This is an alternator?
a
False
b
True
Q. What is this?
(a)
Q.
The lights work but the engine is silent
a Symptom
b Diagnosis
Q.
The battery could be dead. Check the cables and ground connections
a Diagnosis
b Symptom
Q. If the battery doesn't hold the ________ there could be problems in the __________.
a charge-fuel system
b electric system - ignition system
c charge-charging system
d charge - electric system
Q. -What's the starting system ?
a Is responsible for converting the electrical energy from the battery into mechanical energy to start the engine
b Is the one that is in charge of providing energy to the engine
Q.
Which of these images is the starter?
Q.
What components does the starter engine contain?
a Pinion, Solenoid, Motor, Plunger, Contactor and Carrier
b
Ignition, Switch, Battery and Bobina
c Pinion, Solenoid, Motor, Plunger, Hard steel insert and Flywheel
Q.
Why the Direct Cranking Electric Starter is the most used?
a Because it is a simple, compact and low initial cost method.
b Convert electrical energy from the battery into mechanical energy to start the engine
c Because allows electricity from the battery to reach two basic systems: the spark plugs or glow plugs that allow the combustion of the mixture.
