Final Exam Flashcards
An inoperative horn is being tested. A DVOM placed across the relay load contact terminals indicates 12 volts when the horn button is pushed. A “click” is heard from the relay when the button is pushed. Technician A says the relay is bad. Technician B says the relay coil circuit is bad. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says when testing a grounded circuit, if a fuse blows as soon as it is installed, a short to ground is indicated. Technician B says the component will not turn off if the short to ground is on the ground side of the load component but before a grounding switch. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says both an ohmmeter and a self-powered test light may be used to test for continuity. Technician B says both may be used to test fuses. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
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?
A only
B only
Both A and B
Neither A nor B
Neither A nor B
Technician A says a fuse will automatically reset after the cause of the overload is repaired. Technician B says when an overload occurs, the protection device creates an open. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
The leads of a DMM with a diode check function are placed across the terminals of a diode and then reversed. A 0.6 volt reading is obtained in both directions. Technician A says this means the diode is shorted. Technician B says this means the diode is acceptable. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says maximum current will flow through 0 ohms of resistance. Technician B says infinity will not allow current to flow. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says a stepped resistor should be disconnected from the circuit before testing it. Technician B says that a relay may be tested while it is connected to the circuit. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
What will a Zener diode do at breakdown voltage?
Allow reverse current to flow
Stop the flow of reverse current
Sustain damage as a result of current overload
Stop the flow of either forward or reverse current
Allow reverse current to flow
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 vehicle is allowed to run with the battery disconnected. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says an open circuit has no breaks in the path and current will flow. Technician B says in a closed circuit the circuit path is broken. Who is correct?
A only
B only
Both A and B
Neither A nor B
Neither A nor B
Technician A says a Zener diode is an excellent component for regulating voltage. Technician B says when a circuit is opened suddenly to a large load, such as a coil, installing a clamping diode provides a bypass for the electrons. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says to test fuses you could use a voltmeter or a test light. Technician B says a voltmeter and a test light are hooked in parallel. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Which of the following is NOT true of forward bias in a diode?
Free electrons in the N-material and holes in the P-material both move toward the junction.
N-material electrons move across the junction to fill the holes in the P-material.
Negatively charged holes left behind in the N-material attract electrons from the negative voltage source.
The free electrons that moved into the P-material continue to move toward the positive voltage source.
Negatively charged holes left behind in the N-material attract electrons from the negative voltage source.
To use a transistor as a simple solid-state relay, what conditions must occur?
TODO
Technician A says you may replace a fusible link with a larger gauge wire. Technician B says a burned-out fuse indicates a larger-rated fuse should be used. Who is correct?
A only
B only
Both A and B
Neither A nor B
Neither A nor B
Technician A says a shorted circuit can generate excessive heat. Technician B says a shorted circuit will cause the circuit protection device to open. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Which of the following is true about a clamping diode?
It is used to protect some solid-state circuitry.
It cannot be tested with an ohmmeter.
It is not used on modern vehicles.
It cannot be tested with a self-powered test light.
It is used to protect some solid-state circuitry.
A voltmeter that is connected across the input and output terminals of an instrument cluster illumination lamp rheostat indicates 12.6 volts with the switch in the maximum brightness position and the engine off. Which of the following statements is true?
The voltage available to the lamps will be 12.6 volts
The voltage available to the lamps will be 0.0 volts
The rheostat is operating correctly
More information is required to determine if the lamps will operate
The voltage available to the lamps will be 0.0 volts
How much resistance is in a 12 volt circuit that is drawing 4 amperes?
.333 ohms
3 ohms
4.8 ohms
48 ohms
3 ohms
Technician A says metri-pack connectors have push-to-seat or pull-to-seat terminals. Technician B says pull-to-seat and push-to-seat describe the method used when installing the terminals. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
A wiring diagram illustrates three wires that are joined together at “C-215.” Technician A says the wires are connected together at connector C-215. Technician B says the three wires are part of circuit 215. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Which of the following is NOT used to protect a circuit from too much current flow?
Fuses
Busbars
Fusible links
Circuit breakers
Busbars
An operative radiator fan needs to be repaired. Technician A says a single circuit-type wiring diagram would be the simplest diagram to use. Technician B says a component locator will probably be needed to repair this circuit. Who is correct?
A only
B only
Both A and B
Neither A nor B
TODO
(NOT A only)
Where is the best place to find the location of a blower relay?
Wiring diagram manual
Component locator
Connector locator
Ground locator
Component locator
Technician A says wiring diagrams give specific circuit information and detail. Technician B says a wiring diagram will help you find the fault. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
What usually causes a fuse to “blow”?
Too much current
How are fuses rated?
By current capacity
By voltage capacity
By resistance capacity
By power capacity
By current capacity
Technician A says two connectors with the same number are physically the same connector. Technician B says the two connectors are drawn apart so the drawing is easier to read. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says twisted/shielded wire carries low current, and repairs to the wire must not increase the resistance of the circuit. Technician B says twisted/shielded wire carries high current, and any repairs must not increase the resistance of the circuit. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says the VIN number will help to determine the correct wiring diagram to use for diagnosis. Technician B says each automobile model may have a different wiring diagram. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says stranded wire has more resistance than solid wire. Technician B says there is more surface area exposed in a stranded wire due to electron flow. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says the effect of temperature on resistance is a factor in wire size selection. Technician B says wire must be large enough to carry the amount of current necessary for the circuit to operate correctly. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says if a fuse burns out when a switch is turned on, a short circuit is present before the switch. Technician B says if a fuse burns out when a switch is turned on, a short circuit is present after the switch. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
A switch is drawn on a wiring diagram with “NC” printed beside it. What does this indicate?
The switch will be normally closed with the vehicle running.
The switch will be open with the vehicle off.
The switch will be closed with the vehicle off.
None of the above
TODO
Either
“The switch will be normally closed with the vehicle running.”
or
“The switch will be closed with the vehicle off.”
Probably the latter one
What does a dotted line between connectors indicate?
The connectors are electrically connected.
The connectors are physically the same.
The connector is a remote connector.
None of the above
The connectors are physically the same.
Technician A says printed circuit boards may become “etched” if touched with bare hands. Technician B says printed circuit boards are used to simplify the wiring of circuits. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says a common point is represented by a black dot on the wiring diagram. Technician B says a connector can be a common point. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says troubleshooting is a step-by-step process of elimination by use of cause and effect. Technician B says troubleshooting is the diagnostic procedure of locating and identifying the cause of the fault. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says crimping solderless connections is the best method of splicing wires. Technician B says crimping should not be used if connection is subjected to excessive movement. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says a 12.6-volt open circuit voltage reading indicates a fully charged battery. Technician B says a hydrometer reading of 1.265 indicates that a battery cell has the proper electrolyte specific gravity. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says the current capacity rating of a battery depends on the types of materials used in the construction of the battery. Technician B says the amount of electrical energy that a battery is capable of producing depends on the size, weight, and active area
of the plates. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
The battery of a vehicle has “died” three days in a row. Each day the customer was able to start the car after he charged the battery. He was then able to drive the car 150 miles, but the next morning the battery was again discharged. A battery current drain test revealed a 10 mA drain. Technician A says the current drain is excessive and it could be the source of the problem. Technician B says that further testing is required, but it is possible that the battery may need to be replaced. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says during a load test, the battery voltage must not fall below 9.6 volts. Technician B says the load applied should be half the cold cranking amp rating. Who is connect?
A only
B only
Both A and B
Neither A nor B
Both A and B
At 80 degrees F, what is the correct specific gravity of electrolyte in a fully charged battery?
1.200
1.220
1.265
1.290
1.265
How may batteries be rated?
Ampere-hours
Reserve capacity
Cold Cranking Amps
Any of the above
Any of the above
Which of the following statements is NOT true of a replacement battery?
It may have a higher rating than the original battery
It may have a lower rating than the original battery
It should be selected according to an application chart
It may have a lower rating than the original battery
How long can an automotive battery with a cold cranking rating of 380 deliver 380 amperes?
30 seconds at 0° F
60 seconds at 0° F
90 seconds at 32° F
90 seconds at 0° F
30 seconds at 0° F
Battery electrolyte is a mixture of water and what other element?
Lead dioxide
Sulfuric acid
Sulfur dioxide
Hydrochloric acid
Sulfuric acid
Which of the following is an indication of how well a battery would perform if the charging system of a vehicle failed?
Cold cranking amps
Hot cranking amps
Amp-hour rating
Reserve capacity
Reserve capacity
How many volts can each cell of an automobile battery produce?
1.2 volts
2.1 volts
4.2 volts
6 volts
2.1 volts
What is the principle cause of battery water loss?
Leakage through the battery case
Conversion of water to sulfuric acid
Evaporation due to heat of the charging current
Evaporation due to heat of the charging current
A 450 cold cranking amperage battery is being load tested. What will the correct load be?
1350 amperes
450 amperes
225 amperes
990 amperes
225 amperes
When using a battery starter tester to make a battery load test, turn the control knob to draw battery current at a rate equal to which of the following?
The battery’s ampere-hour rating
Twice the battery’s ampere-hour rating
15.5 volts for a 12-volt battery
1/2 of the battery’s cold cranking amps rating
1/2 of the battery’s cold cranking amps rating
At the end of a three-minute charge test, the voltage reading for a satisfactory 12-volt battery should not exceed how many volts?
13.0 volts
15.5 volts
12.6 volts
9.6 volts
15.5 volts
How much of a change in specific gravity readings does
temperature compensation involve for every 10 degrees?
0.004
0.040
0.400
4.000
0.004
Technician A says a fully charged battery will not freeze as easily as a discharged one. Technician B says the specific gravity of a fully discharged battery is around 1.100. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Why should specific gravity readings be temperature compensated?
They are a more accurate indicator of the actual state of charge
Electrolyte gets thicker as it gets warmer than 80° F
Hydrometers do not work on cold batteries
None of the above
They are a more accurate indicator of the actual state of charge
The condition of a battery cable end (where it connects to the battery post) is questionable. Technician A says a battery leakage test will determine the quality of the connection. Technician B says a battery terminal voltage drop test can be used to determine the quality of the connection. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Which of the following statements about NiMH cells is NOT true?
When a NiMH cell discharges, hydrogen moves from the anode to the cathode electrode.
Nickel-metal hydride batteries have an anode electrode that contains nickel hydroxide.
The alkaline electrolyte has no active role in the chemical reaction.
The plates are separated by a sheet of fine fibers saturated with potassium hydroxide
Nickel-metal hydride batteries have an anode electrode that contains nickel hydroxide.
True or False: A tighter-than-normal engine will decrease the amperage draw of the system.
False
True or False: Slower-than-normal speed and higher-than-normal cranking amperage is usually the result of internal starter problems.
False
True or False: A neutral safety switch will have continuity through it when the transmission is in drive or reverse.
False
The ring gear teeth of a flywheel are badly worn in various spots. Technician A says this could cause poor drive gear engagement. Technician B says this could cause a lower-than-normal starter current draw. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
What should be done to the system when a 0.7 volt drop is observed between the battery positive terminal and the starter solenoid with the engine cranking?
Install a larger battery
Nothing, it is acceptable
Replace the cable or component between the voltmeter leads
None of the above
Replace the cable or component between the voltmeter leads
All of the following could prevent a starter solenoid from engaging, EXCEPT
an open in the neutral safety switch
a shorted clutch safety switch
a bent armature shaft
an open ignition switch
a bent armature shaft
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 only
B only
Both A and B
Neither A nor B
B only
The overrunning clutch protects the armature from
spinning too slow.
spinning too fast.
electrical short circuits.
starting the vehicle while it is in drive.
spinning too fast.
Which of the following statements is true of solenoids?
They use the electromagnetic field of a coil to pull a plunger into the coil.
They are generally used to engage the starter motor with the engine flywheel.
They operate with a movable plunger and usually do a mechanical job.
All of the above
All of the above
Technician A says the two windings of the solenoid are called the pull-in and the hold-in windings. Technician B says both windings of the solenoid are continually energized any time the ignition switch is in the start position and the starter motor is spinning. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
The overrunning clutch accomplishes which of the following?
Separates the starter motor from the flywheel
Brings the starter motor into contact with the flywheel
Protects the starter motor from spinning too rapidly
All of the above
All of the above
The starting safety switch is also called a
remote-operated switch
manual-override switch
neutral-start switch
neutral-start switch
Technician A says a full battery test series should be done before testing the starting system. Technician B says the internal condition of the engine has little effect on the operation of the starting system. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
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 only
B only
Both A and B
Neither A nor B
Both A and B
When there is no current draw and the starter does not rotate, the cause could be
open field windings
open armature coils
broken brushes or springs
All of the above
All of the above
Technician A says speeding up the armature will result in decreased amperage draw. Technician B says slowing down the starter armature will result in increased amperage draw. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says increasing the amount of current flowing through a conductor will increase the strength of its magnetic field. Technician B says coiling a wire around a soft iron core will increase the strength of its magnetic field. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
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 only
B only
Both A and B
Neither A nor B
A only
Which of the following represents the correct sequence of steps that may need to be performed when testing a starting system?
Visual inspection, battery condition, voltage drop, starter draw
Visual inspection, voltage drop, battery condition, starter draw
Battery condition, visual inspection, starter draw, voltage drop
Visual inspection, battery condition, starter draw, voltage drop
Visual inspection, battery condition, starter draw, voltage drop
In the ISG how does current flow to make the system perform as a starter?
Through the rotor to create an electromagnetic field that excites the stator which causes the rotor to spin.
Through the rotor coils which cause the magnetic field to collapse around the stator and rotate the crankshaft.
Through the stator windings which generate magnetic fields in the rotor, causing the rotor to turn the crankshaft.
From the start generator control module to the rotor coils that are connected to the delta wound stator.
Through the stator windings which generate magnetic fields in the rotor, causing the rotor to turn the crankshaft.
Technician A says a full fielding test should be performed only if the charging system fails the output test. Technician B says the field windings are constantly energized with full battery current during full fielding. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
The charging system of a vehicle equipped with an on-board 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 only
B only
Both A and B
Neither A nor B
A only
Technician A says before performing a voltage output test, a visual inspection and preliminary check of the charging system should be done. Technician B says a voltage output test will indicate if the charging system is working properly. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
A 100amp AC generator produces 105 amperes all the time. Full fielding it produces 105 amperes also. What does this indicate?
The regulator is running the AC generator full field all the time
The AC generator is faulty
The output wire has excessive resistance
The drive belt is slipping
The regulator is running the AC generator full field all the time
What components make up the AC generator field circuit?
Battery, stator, and diodes
Battery, regulator, and stator
Battery, rotor, and regulator
Regulator, stator, and rotor
Battery, rotor, and regulator
What type of voltage is the output at the “Bat” terminal of the AC generator?
DC
AC
Three-phase unrectified
None of the above
DC
A ground circuit voltage drop test taken on a vehicle’s alternator indicates a 0.965V drop. Technician A says this could cause a problem in the alternator’s field current. Technician B says this could affect the output circuit of the alternator. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says when testing the voltage output, if the charging voltage is too high, the cause could be a 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 only
B only
Both A and B
Neither A nor B
Neither A nor B
Technician A says a shorted diode may be indicated by a whining noise. Technician B says a squealing noise may indicate a loose belt. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Why should an AC generator never be operated open-circuit?
It could overcharge the battery
It could burn out electronic components
It could ruin the AC generator stator
None of the above
It could burn out electronic components
The charging system of a vehicle is producing 100 amps and 12.4 volts at 1500 RPM with all electrical accessories turned “on.” The charging system output specification for this vehicle is 110 amps. Technician A says the alternator needs to be replaced. Technician B says the electrical demand of the vehicle may be exceeding the capacity of the charging system. Who is correct?
Technician A
Technician B
Both Technician A & B
Neither Technician
Technician A
How many output diodes does an AC generator stator with three windings usually have?
Three
Four
Five
Six
Six
Technician A says when testing the charging system, the state of charge of the battery is not a concern. Technician B says the battery must be checked first before testing the charging system. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says a scan tool may be used to full field some alternators. Technician B says a field current draw test indicates if there is current available to the field windings. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
What does increasing the regulator field resistance mean?
More output current is desired
The rotor is turning too slowly
Less output current is desired
B+ sensing voltage is lower than specified
Less output current is desired
Technician A says when testing, the ground side voltage drop should be less than 0.2 volt. Technician B says the total insulated system drops should be less than 0.7 volt. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Where is the output of an AC generator created?
The stator
The rotor
The housing
The brushes
The stator
Technician A says the regulator is the cause if full fielding with the regulator bypassed produces lower than specified output. Technician B says a full field test will isolate the problem if it is in the AC generator or the regulator. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
What device(s) is (are) used to rectify current in an AC generator?
Brushes
Diodes
Stator
Rotor
Diodes
What component carries the magnetic field current in an AC generator?
The stator
The rotor
The housing
The rotor
Which of the following statements is true concerning headlight circuits?
The circuits can have totally insulated bulbs and grounded switches
All lamp filaments are connected in parallel
Some circuits use lamps that contain both a high beam and a low beam
All of the above
All of the above
The taillights of a vehicle are dimly illuminated whenever the brake lights are on. Technician A says this could be caused by a blown fuse. Technician B says an open ground circuit could cause this problem. Who is correct?
A only
B only
Both A and B
Neither A nor B
TODO
Which of the following lamp designs have the fastest activation time?
Neon
Tungsten
Halide
Neon
Technician A says composite headlights do not have replaceable bulbs. Technician B says composite headlights with broken lenses will continue to operate. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
To assist in headlight aiming, most sealed beam lenses use
Connecting prongs
Aiming pads
Filaments
None of the above
Aiming pads
The “bulb failure” warning light of a vehicle is illuminated whenever the headlights are turned on. Technician A says this can be caused by an excessive voltage drop on the ground circuit of one of the headlamps. Technician B says excessive resistance in the left low beam circuit could cause the warning light to be on. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says a poor ground on one of the headlamps will cause it to be dim. Technician B says AC generator output that is too high can cause headlights to be brighter than normal. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says the fastest check when only one bulb in the circuit is not operating, is to replace it with a good one. Technician B says start the diagnostic tests at the easiest location to access. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Which of the following is NOT true of automatic headlamp systems?
They can turn headlamps on or off
They can control high- and low-beam switching
They are easily repaired when defective
They can be adjusted to fit various conditions
They are easily repaired when defective
How is a three-bulb taillight system wired?
It has a common brake turn signal bulb
It uses separate bulbs for turn signals and brake lights
All taillights are wired in series
It uses side markers that flash in the rear
It uses separate bulbs for turn signals and brake lights
Technician A says the flasher uses a bimetallic strip to open and close the turn signal circuit. Technician B says the dimmer switch is a part of the turn signal circuit. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
The right headlight does not function on either high or low beam. Technician A says this could be caused by an open ground on the right side. Technician B says
the B+ to the dimmer switch might be open. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says excessive resistance in the common portions of the circuit could cause both headlights to be dim. Technician B says low AC generator output could be the cause of dim headlights. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says the flasher is at fault when the turn signals work in one direction, but the indicator light stays on steadily in the other direction. Technician B says this condition may be caused by a burned out light bulb. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Which of the following is NOT used to control the brightness of the instrument panel lamps?
Diodes
Potentiometer
Rheostats
None of the above
Diodes
What are nonelectronic turn signal flasher units acting like when they supply a rapid on-off-on current flow to the turn signal lamps?
Circuit Breaker
Technician A says when replacing a composite headlight bulb, it is ok to touch the glass envelope with your fingers. Technician B says when replacing a composite headlight bulb, extreme care must be taken so as not to touch the glass envelope with your fingers. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says diodes are used in the center high mounted stop light (CHMSL) circuit for proper turn signal operation. Technician B says diodes are used in the center high mounted stop light (CHMSL) circuit to prevent radio static when the brake light is activated. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
What are the only white lamps allowed on the rear of a car?
Backup lamps and turn signal lamps
Backup lamps and license plate lamps
Turn signal lamps and backup lamps
License plate lamps and turn signal lamps
Backup lamps and license plate lamps
Technician A says an LED brake light illumination time is much more than a conventional incandescent bulb. Technician B says LED lighting has an extended life span when compared to standard bulbs. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says trouble codes will direct the technician to the circuit with a fault. Technician B
says trouble codes will locate the exact failure in the circuit. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Which of the following is an example of a piezoelectric sensor?
Oil pressure gauge sender unit
Knock sensor
Coolant temperature sender unit
Hall-effect sensor
Knock sensor
Technician A says to test sensor signals, a breakout box can be used. Technician B says sensors can only be tested with a scan tool. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says the computer will make control commands to various output devices during the
output function. Technician B says the computer uses the input information and compares it to
programmed instructions during the processing function. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says positive temperature coefficient thermistors increase their resistance as the temperature increases. Technician B says as the temperature decreases, negative coefficient thermistors reduce their resistance. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Which of the following would NOT be considered a computer input?
Throttle position sensor
Magnetic pulse generator
Park/Neutral switch
EGR vent solenoid
EGR vent solenoid
Technician A says when servicing the BCM, a test light should be used to check for voltage. Technician B says before making or breaking electrical connections to the BCM, make sure the ignition switch is off. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says a NOT gate simply reverses binary ones to zeros and vice versa. Technician B
says AND gate operation is similar to two switches in series to a load. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Which of the following is an actuator?
A motor
A relay
A solenoid
All of the above
All of the above
A Park/Neutral switch is being tested. When the transmission is placed in the park position, the
voltage at the switch is 12 volts. When the transmission is shifted into reverse, the voltage drops to
0.0 volts. Technician A says the Park/Neutral switch needs to be replaced. Technician B says the Park/Neutral switch is operating correctly. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
What is the Whetstone bridge used to measure?
Pressure
Mechanical strain
Temperature
All of the above
All of the above
Technician A says the output of a Hall-effect sensor can be checked with an AC voltmeter. Technician B says output of a magnetic pulse generator can be tested with a lab scope. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Technician A says the output of one computer can also be used as an input to another computer.
Technician B says a sensor is an output device. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says RAM will store temporary information that can be read from or written to by the MP. Technician B says ROM can be written to and changed by the computer. Who is correct?
A only
B only
Both A and B
Neither A nor B
A only
Technician A says nonvolatile RAM will lose its memory if removed from its power source. Technician B says volatile RAM is not erased when it is disconnected from its power source. Who is correct?
A only
B only
Both A and B
Neither A nor B
Neither A nor B
Technician A says electrostatic discharge will destroy a PROM chip. Technician B says installing a PROM chip backwards will immediately destroy the chip. Who is correct?
A only
B only
Both A and B
Neither A nor B
Both A and B
Technician A says high-side drivers control the ground side of the circuit. Technician B says high-
side drivers may be capable of determining circuit faults. Who is correct?
A only
B only
Both A and B
Neither A nor B
B only
Which of the following would represent the number “255” in binary code?
00000000
11111111
00001111
11110000
11111111
Which of the following is responsible for sequential sampling?
DEMUX
MUX
?
Register
MUX
Technician A says the microprocessor commands actuators by output drivers. Technician B says that outputs are never controlled by supplying voltage to the actuator. Who is correct?
A only
B only
Both A and B
Neither A nor B
TODO
