Batteries Test
What is the current in a 12-volt circuit with a 6-ohm resistor connected series?
2 amps
The reference voltage (VERF) sent to most sensor ranges from _____ to _____ volts.
5.0 - 9.0
2 types of lane departure system
A and B
Technician A disconnects the batter ground cable prior to replacing a fusible link. Technician B uses a fusible link that is larger [lower gauge number] than the circuit it protects. Who is correct?
A only
Technician A says diodes are used to rectify the voltage produced from an AC generator. Technician B says a zenerdiode protects circuit components from voltage spikes. Who is correct?
A only
Technician A uses the vehicle's built-in bubble level to adjust headlight vertical aim. Technician B uses a screen at ten feet from the vehicle to aim headlights. Who is correct?
A only
Also called an alternator, a generator that produces alternating current.
AC generator
Standard sealed beams are typically filled with ______.
ARGON
What type of test equipment is needed to perform a charging system current output test?
An Ammeter
The park distance control system warns the driver that the vehicle is close to an obstacle by _____.
An audible signal that increases in frequency as the vehicle gets closer.
The stoplight switch is normally mounted on the _____
BRAKE PEDAL ARM
mechanical shield or shutter plate is a feature of
Bi-Xenon
Circuit breakers are being discussed. Technician A says after the circuit breaker is tripped, it must be reset by pressing a button on the breaker. Technician B says some circuit breakers automatically reset after the power has been turned off for a few seconds. Who is correct?
Both
Technician A says a Hall-effect switch uses a semiconductor, permanent magnet, and trigger wheel to measure shaft speed. Technician B says an engine coolant temperature sensor is basically a thermistor. Who is correct?
Both
Technician A says a lamp may contain only one filament. Technician B says some lamps contain two filaments. Who is correct?
Both
tech a blinking headlights can be caused by a self resetting circuit breaker. tech b blinking can be caused by loose electrical connection
Both
Sulfation of battery plates can cause
Both "lower specific gravity" and "reduced reserve power in cold weather"
A six-way power seat is NOT operating in any switch position. Technician A says to check the circuit breaker. Technician B says there may be excessive resistance in the electrical circuit. Who is correct?
Both A and B
Which method for testing for a battery's state of charge can be used on maintenance free batteries
Built in Hydrometer, open circuit voltage test
On a PCM-controlled AC generator, system voltage is controlled by varying the _____ of the current applied to the field coil.
Duty Cycle
NTC thermistor used in
Engine Coolant Tempt
A parallel circuit can only have one load on each leg.
F
Voltage stays constant in a closed electrical circuit, but the amperage drops as it powers a load.
F
Because of memory affect, nickel-metal-hydride [Ni-MH] type batteries are never used in hybrid vehicles
False
Cranking problems can be created if oversize battery cables are installed.
False
Does a analog gauges use digital display of numbers?
False
Flash-to-pass systems blink the high beams on and off when the turn signal lever is moved to change lanes to pass another vehicle.
False
Permanent magnet starting motors use strong magnets surrounded by field coils to produce extra turning torque.
False
Testing voltage regulator by full fielding alternator
False
The electrolyte in a battery cannot freeze, even if the battery is discharged and the temperature drops below 0 degrees Fahrenheit
False
The starter must never operate for more than sixty seconds at a time and should rest for two minutes between extended cranking.
False
while the engine is cranked a voltmeter placed between positive battery post and positive post of the starter reads less than .01 volt. the cause would be
Normal
Protects the starter motor from spinning too rapidly
Overrunning Clutch
What are most intermittent wipers controlled by ?
Potentiometer
A simple on/off switch with one input terminal and one output is a _____type switch.
SPST [single pole, single throw]
An ohmmeter can be used to check for continuity.
T
Electromotive force is measured in volts.
T
High resistance in a circuit causes decreased current flow
T
Most horns are controlled by a relay.
T
The schematic for a relay is typically shown on the outside of the relay.
T
Vehicle lighting systems are regulated by federal laws.
T
Tech B says Positive batter post is largaer than negative. Tech B disconnects Positive cable first. Who is correct
Tech A only
Technician A says a battery strap or carrier should be used whenever a battery is lifted. Technician B says when a battery is removed, the positive cable should be disconnected first. Who is correct?
Tech A only
Technician A uses a solution of baking soda and water to clean a battery. Technician B uses soap and water.
Tech A only
A bad diode can cause an abnormal whirring noise in the AC generator.
True
A battery is an electrochemical device that converts chemical energy into electrical energy.
True
Battery hold-downs reduce the amount of vibration and help increase the life of a battery
True
Concealed [pop-up] headlights were often operated by vacuum on older vehicles.
True
Dirt on antenna can interfere with reception
True
EEPROM allows stored memory to be electircally changed
True
Fluid lever in washer fluid will close the circuit and " LOW fluid" will turn on
True
In OBII IS diagnostic routine
True
Most modern vehicles have a warning system that alerts the driver when the driver's door is opened when theheadlights or parking lights are turned on.
True
Most starter motors have 2-6 brushes
True
On a top post battery the positive terminal is slightly larger than the negative
True
The output of an AC generator can be as high as 250 volts if it is not controlled.
True
The specific gravity of the electrolyte decreases as the battery is discharged.
True
The typical CCA rating for passenger car or light truck is between 300 and 600 amps
True
The voltage regulator controls voltage by varying the field current through the rotor.
True
twisted wires do not increase interference
True
when a circuit protection device opens due to higher than normal current, a short is the likely cause
True
Gauges typically receive how many volts
about 5 Volts
power windows use
all of the above
which is a type of diode zener clamp
all of the above
common service for anti-theft system
both adding and replacing keys
2 speed permanent magnets
brushes
customer complains headlights are always. what do you check first?
check for articles placed on top of dash
Starting in model year 2008, what type of communication protocol is required for diagnostics?
class C (CAN)
Which of the following is not a type voltage generating sensor?
coolant temperature sensor (CTS)
Corrosion on or near the battery must be minimized because,
corrosion increases resistance, destroy hold down straps, and corrosion on battery cover can create a path for battery to slowly discharge
most common problem with defrosters
damage to grids on window
changes AC to Dc
diodes
A momentary contact switch is used to operate the _____.
horn
The four basic computer functions that work together in a computer system:
input, processing, output, and storage.
part swtich for windshield wiper motor is
inside motor.
allows the control module to share data
multiplexing
Technician A says when there is a complete path through the electrical circuit, the circuit is said to be open. Technician B says when the circuit path is broken or interrupted the circuit is said to be closed. Who is right?
neither A nor B
When load testing a battery, the load applied to the battery should be _____.
one half the CCA rating
Rear defrosters generally have a relay with a timer to allow the defogger to ______.
operate for only a specific amount of time
low cranking rpmcranking voltage measures 9.1v at the starter solenoid terminal. what chould be done next
perform a cranking current test
some antitheft systems use in the ignition key a
resistor
throttle position sensor is a
rotary potentiometer
An engine coolant temperature sensor is an example of a(n) ______.
thermistor
A battery should be checked and charged as needed before performing any starting system tests.
true
Permanent magnets do not need brushes
true
DLC connector located
under dash on driver
The best way to test a battery cables and terminal for excessive resistance is by ______ testing
voltage drop