Electrical Final

A computer-controlled charging system is undercharging. A lab scope connected to the ground side of the alternator field indicates a 90 percent duty-cycle. Technician A says the alternator may need to be replaced. Technician B says the on-board computer may need to be replaced. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

A high-side driver-controlled heated seat grid system is being diagnosed. The connector from the control module is back probed and a voltmeter is connected to the output circuit from the controller to the seat grid. When the system is activated, the voltmeter reads zero volts. Technician A says this system may deactivate system if a fault is detected. Technician B says the control module is faulty. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

Technician A says SMR1 and SMR3 are turned on to provide the needed current for the motor-generator to start the engine. Technician B says SMR1 is turned on and SMR2 is turned off to allow free flow of current in the circuit. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

Technician A says during a frontal collision, the backup power supply will deploy the airbag if the battery becomes disconnected. Technician B says all backup power supplies will power down one minute after the negative battery is disconnected. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

Technician A says fiber optics is the transmission of light through several plastic strands that are sheathed by a polymer. Technician B says fiber optics can only be used if there are no bends in the conduit. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

Technician A says the commutator is a series of conducting segments located around one end of the armature that come in contact with the brushes. Technician B says the armature is the stationary component of the motor that consists of a conductor wound around a pole shoe. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

A

The ____ test measures the electrical load of the starter when it is actuated. A. current-draw B. battery C. voltage drop D. compression

A

Which of the following is NOT used to control the brightness of the instrument panel lamps? A. Diodes. B. Potentiometers. C. Rheostats. D. Pulse width modulation.

A

A digital multimeter is being used to measure current flow. The meter displays 97. mA. Tech A says this represents 9.75 amperes. Tech B says this represents 0.0975 amperes. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

B

A high voltage on the three-wire potentiometer sensor's signal circuit would most likely be caused by which of the following? A. An open in the supply circuit. B. An open in the signal circuit. C. A short to ground in the supply circuit. D. A short to ground in the signal circuit.

B

A vehicle is being checked for a no-crank condition. A voltmeter placed across the contacts of the starter solenoid indicates 12 volts when the ignition is turned to the "start" position. A distinct "click" noise is heard coming from the solenoid at the same time. Technician A says the starter motor may have an open armature or field current. Technician B says the starter solenoid needs to be replaced. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

B

A(n) ____ AC generator is usually found in applications that do not require high-amperage output. A. delta-wound B. wye-wound C. phase D. asynchronous

B

According to Ohm's Law, what is the resistance when 1 volt pushes 1 ampere of current through a conductor? A. ​0 ohm B. ​1 ohm C. ​1 watt D. ​1 coulomb

B

All of the following are types of hybrid air bag modules EXCEPT: A. Solid fuel with argon gas B. Cooled gas inflator C. Liquid fuel with argon gas D. Heated gas inflator

B

An undeployed airbag is being replaced because the trim cover is cut. Technician A says it can be recovered. Technician B says it must be deployed before it is scrapped. A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

B

On a vehicle equipped with an immobilizer system, the engine starts for a few seconds and then dies. What is the LEAST likely cause of this? A. An invalid key was used. B. A misadjusted doorjamb switch. C. The immobilizer module has a poor ground. D. Lost communication between immobilizer module and PCM.

B

Piezoelectric devices are used to measure ____ by the generation of voltage. A. voltage drop B. pressures C. discharge rate D. temperature

B

Technician A says the compressed hydrogen system requires a reformer to cool the fuel cell. Technician B says a fuel cell produces electrical energy by breaking down hydrogen atoms into electrons and protons. A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

B

The term ____ means a circle and is the path of electron flow consisting of the voltage source, conductors, load component, and return path to the voltage source. A. parallel B. circuit C. diode D. series

B

The voltage drop test determines if the battery, regulator, and AC generator are all operating at ____. A. odds with each other B. the same potential C. the same temperature D. differing current levels

B

What usually controls an oil pressure warning lamp? A. Voltage drop B. A ground switch C. A ground sensor D. Any of the above automotive

B

A 450 cold-cranking amperage battery is being load tested. What will the correct load be? A. 1350 amperes B. 450 amperes C. 225 amperes D. 990 amperes

C

A deployed airbag has a powdery residue on it. Technician A says this powder is mainly sodium carbonate. Technician B says it may contain corn starch. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Climate-controlled seats are being discussed. Technician A says a Peltier element can be used to either heat or cool the airflow as it passes through the controller. Technician B says the system may rely on several modules to perform their functions. A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Electrical energy is produced in the battery by the chemical reaction that occurs between two dissimilar plates that are immersed in a(n) ____ solution. A. pure water B. pure acid C. electrolyte D. alkali

C

Ground straps are used to: A. Provide a return path to the battery between insulated components. B. Suppress electromagnetic induction. C. All of these choices. D. None of these choices.

C

Symptoms of ____ include slow-cranking, discharged battery, low instrument panel ammeter or voltmeter readings, and charge indicator lamp on. A. overcharging B. excessive current drain C. undercharging D. belt wear

C

Technician A says a normally open switch is used in most coolant temperature warning light circuits. Technician B says most oil pressure warning circuits use a normally closed switch. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Technician A says damage can occur to solid-state circuitry if the charging voltage is allowed to get too high. Technician B says damage can occur if the engine ran with the battery disconnected. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Technician A says most hybrid vehicles have a high voltage battery pack. Technician B says most vehicles have a 12 volt battery. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Technician A says the circuitry of the CAN bus usually consists of a pair of twisted wires. Technician B says for digital data to transfer, the CAN bus voltage is simultaneously pulled high on one circuit and pulled low on the other. Who is correct?

C

Technician A says the neutral safety switch can apply a ground to the starter relay. Technician B says the neutral safety switch can also control the back-up lights on a vehicle. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

Technician Asays needle movement in a three-coil gauge is the result of the interaction of three electromagnets and the total field effect upon a permanent magnet. Technician B says the interaction of a permanent magnet and an electromagnet, and the total field effect causes the needle movement in the d'Arsonval gauge. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

The ____ circuit supplies the initial current for the field coil that starts the buildup of the magnetic field. A. starter B. excitation C. preexcitation D. charging

C

The driver-side power window will not go up or down. Technician A says a worn motor may be the problem. Technician B says the problem could be caused by a faulty master switch. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

C

The high-voltage service plug: A. Disconnects the inverter/converter from the motor generators. B. Disconnects the auxiliary battery from the HV battery. C. Disconnects the HV battery from the system. D. Provides a connection for the battery charger.

C

The right front electric window is inoperative regardless of which switch is used. It sounds like the motor is turning. Technician A says the window regulator may be disengaged. Technician B says the sector gear may be worn. Who is correct? A. Technician A Only B. Technician B Only C. Both Technician A and B D. Neither Technician A nor B

C

To test the photocell, use a scan tool or a DMM to measure the ____ of the photocell signal circuit to the BCM. A. resistance B. current C. voltage D. amperage

C

Today there are very few electrical systems that are still ____. A. networked B. battery operated C. independent D. complex

C

____ have increased system reliability through the reduction of circuits and improved efficiency by less power demands and more accurate control. A. Diagnostic trouble codes B. Live data streams C. Multiplexing systems D. By-directional controls

C

A lamp outage module can monitor the operation of which lighting system? A. Headlights B. Taillights C. Stoplights D. All of the above

D

A voltmeter placed across the terminals of an inoperative electric window motor indicates 12 volts when the window switch is depressed. Technician A says the window ground circuit may be faulty. Technician B says the window power feed circuit may be faulty. Who is correct?

D

In a PEM fuel cell, Which side does the oxygen enter from? A. Gate B. Anode C. Drain D. Cathode

D

On an HEV, never cut the ______ high-voltage power cables. A. Red B. Blue C. Yellow D. Orange

D

Radio wave transmission is based on the principle of ____. A. reproduction B. conductance C. deduction D. induction

D

Some fuel cell systems may require the use of an on-board reformer to extract ____ from liquid fuels such as gasoline, methanol, or ethanol. A. hydrocarbon B. oxygen C. electrical energy D. hydrogen

D

Technician A says the lamp outage module is a current measuring diode. Technician B says a lamp outage module may contain a set of resistors wired in parallel. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

D

Technician A says when testing the voltage output, if the charging voltage is too high, the cause could be an open field wire from the regulator. Technician B says a loose or glazed drive belt could be the cause of too high charging voltage. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

D

The HEV uses an inverter to invert the DC voltage from the HV battery into ____ voltage for use by the motors. A. DC/DC B. HV DC C. LV DC D. three-phase AC

D

The battery ECU attempts to keep SOS of the HV battery at: A. 30% B. 40% C. 50% D. 60%

D

The insulation test function is being discussed. Tech A says that the test is performed with the circuit powered. Tech B says the meter displays the circuit's voltage. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B

D

Vehicle ____ systems monitor the various vehicle operating systems and provide information to the driver about their correct operation. A. charging B. lighting C. power D. instrumentation

D

Who is Brenden? A. Daddy B. Bae C. Awesome D. All of the above

D

____ occurs when electricity seeks a path of lower resistance and operates another component than the one intended. A. Conductivity B. High resistance C. Illumination D. Feedback

D

____ refers to the sensor signal being as constantly proportional to the measured value as possible. A. Repeatability B. Accuracy C. Operating range D. Linearity

D

A battery must be fully charged before testing with a conductance tester. True or False.

False

A bend in the cable can result in a nonoperating fiber optic indicator. True or False.

False

A tighter-than-normal engine will decrease the amperage draw of the system. True or False.

False

Corrosion is not a contributor to voltage drop. True or False.

False

Illuminated entry systems turn on the courtesy lights after the doors are opened. True or False.

False

The conductor of an 18-gauge wire is larger than that of a 10-gauge wire. True or False.

False

The load current flowing through a transistor passes through the emitter and the base circuit. True or False.

False

The hybrid electric vehicle (HEV) system can use ____ to recover energy that normally would be lost to heat and use it to supplement the power of the engine. A. recycling B. special sensors C. regenerative braking D. high-voltage

Regenerative Braking

A manufactures service information will usually be the best source of correct procedure when servicing a vehicle. True or False.

True

A neutral safety switch is used on vehicles with automatic transmissions. True or False.

True

Any sensing wire voltage drops will increase the system voltage by the amount of the drop. True or False.

True

Hard code failures are those that were detected the last time the BCM tested the circuit. True or False.

True

Most EICs have a prove-out display each time the ignition switch is turned on. True or False.

True

There should be a two-minute wait between cranking attempts. True or False

True

Vehicles equipped with manual transmissions have a clutch safety switch. True or False.

True

Voltage drop can exist on the power side as well as the ground side of an electrical circuit. True or False.

True