ASE A6 Electrical/Electronic Systems Certification Practice Guide, Exams of Electrical and Electronics Engineering

Download ASE A6 Electrical/Electronic Systems Certification Practice Guide and more Exams Electrical and Electronics Engineering in PDF only on Docsity!

ASE A

Electrical/Electronic Systems Certification Practice Guide

ASE A6 Electrical /Electronic Systems Certification Practice Guide An air bag system is being serviced, Technician A says to disconnect the yellow SRS connectors at the front of the vehicle. Technician B says to disconnect and isolate the negative battery cable. Who is right? A, Technician A only B, Technician B only C. Both A and B D. Neither A or B- XORRESIANSSIBR Which of these should be used when soldering electrician wiring connections? A. rosin core flux B. acid core flux C. sulfur core flux D. none of the above - SORRECTANSWERI... When testing computer-controlled systems, a digital multimeter should be used with an input impedance of ac least: A. 1Ok ohms B, l[OOk ohms C. | megohm D. 10 megohms- SORRECTANSIWERE. When troubleshooting a slow drain on the battery, which if these diagnostic tools should be used? Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B- SOREEGTINNSIZERE.. The analog chmmeter needle does not move when connected as shown above. (pg 82) This indicates that the rotor winding is: A. shorted B. grounded C. complete Dope - CORRECTANSWER A vehicle's tum signals flash too slowly. Technician A claims that the condition could be caused by a faulty flasher. Technician B says that a bulb may be the wrong type. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- SORECANSNPER Technician A says a short circuit to ground in a circuit will decrease resistance. Technician B says a short circuit will Increase current flow. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B- SOREEGTINNSIZERE.. The voltmeter meter in the circuit shown above reads 3.5 volts. (pg 82) Technician A says that a bad ground for the light could be the cause. Technician B says chat high resistance in the circuit from the battery to the light could be the cause. Who is right?? A, Technician A only B. Technician B only C. Both A and B D. Neher A or B- SXOREECIANSSIBR When using a volemeter to check for voltage in a circuit, che voltmeter should first be connected to check for: A. source voltage. B, excessive resistance C. excessive amperage. D. good ground - CORRESTANSSTERE D. Neither A or B- CORRECT ANSWER ~a Nothing happens when the ignition key Is turned to the START posltion In a vehicle with a good battery. Teohnician A says that If a clicking sound is heard when a jumper wire is ‘connected between the battery and the solenoid 'S’ terminal, a problem exists in the starter control circuit. Technician B says that if a jumper wire is connected between the battery and the soienold 'S' terminal and there Is no sound, the starter Is defective. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B- SORREGINANSWERL-D. Ifa jumper wire is connected between the battery and the solenoid 'S’ terminal and the engine cranks, there is a problem in the starter control circuit. If the solenoid makes a clicking sound, it Is operating properly and the problem may be with the starter. Tf no sound is heard, the solenoid is defective and should be replaced. Avehicle continues to trip the windshield wiper circuit breaker. Technician A says the cause could be a short circuit Technician B says that the cause could be binding wiper linkage. Who is right? A. Technician A only B. Teohnician B only C. Both A and B D. Neither A or B- G@ORREGIANSWERI-C. A circuic breaker will disconnect che circuit if the circuit has higher chan normal current flow, which can be caused by a short in the circuit or a binding of the wiper linkage. Technician A says that a battery with an open circuit voltage of 12.1 volts Is fully charged. Technician B says that if che Indicator on a sealed maintenance-free battery Is yellow, the battery shouid be charged. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER. D. A battery with a 12.1 volt reading is undercharged. Technician B is wrong because if the indicator is yellow on a sealed maintenance-free battery, it means that the fluid level is below the level of the hydrometer. The battery should not be charged and should be replaced. When performing a current draw test using an ammeter, a reading greater than that which was specified would indicate: A. excessive circuit resistance B, a decrease in olreult resistance C. an open circuit D. a decrease in circuit volage - SORREGIANSWERE B. When pecforming a cursent daw test using an ammeter, a decrease in circuit resistance will cause a reading greater than what was specified. Technician A says that using a 20,000 ohm/volt analog meter ts a good choice for ECM clroult testing. Technician B says that oarefui use of a test light can determine the condition of a Throttle Position (TP} D. low ammeter indication - CORRECT ANSWER -C. Short light bulb life and a battery that continually needs water ar indications of over charging. In the charging system shown above, the reading will show: (pg 84) A. charging output voltage B, indicator lamp operating voltage C, charging circuit voltage drop D. ignition switch voltage - GORRBCMANSWERI-C. In the circuic shown in the illustration, the meter will show the charging circuit voltage drop from the alternator BAT terminal to the wire terminal or bus, to the positive battery post. The horns in the circuit shown above (pg 84) only blow when a jumper wire is connected between terminals | and 2 of the horn relay. Technician A says that a bad horn relay could be the cause. Technician B says that a ground in the circuit between the horn relay and the horn button could be the cause. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- GORREGHANSHER!.A. Connecting a jumper wire berween terminals | and 2 would bypass the relay and supply direct voltage from the battery to the horns, indicating a possible bad horn relay. If the circuit between the horn button and the horn relay were grounded, the horn relay would be energized and the horns would blow all the time, A rear defogger grid is being tested. Technician A says that when probing a grid line, the volemeter should decrease its reading as the probe gets closer to the ground bus bar. Technician B says that if voltmeter read 12 volts at both ends of the grid line, there is an open in the grid line. Who is right? A, Technician A only B. Technician B only C, Both A and B D. Neither A or B- CORRECT ANSWER -A. If the test light remains bright at both ends of the grid lines, check for a loose ground. If there is an open in a grid line, the test light will not get dimmer and will stay the same brilliance until ic reaches the other side of the open, at which point it will go out. All of the following warning system lights use a grounding switch EXCEPT: A. oil pressure B. coolant temperature C. brake warning D. charging system - G@ORREGIANSWERLD. Charging system warning lights are controlled by charging voltage. The light bulb is not grounded at the instrument panel. Instead, current flows through the bulb and eventually grounds at the ground brush inside the alternator. When the alternator is charging, current flows through a wire to the opposite side of the bulb from the ignition switch. Because both sides of the bulb receive similar voltages, no current flows through the bulb and it doesn't light. Technician A says that all power should be removed from a circuit before testing the circuit with an ammeter. Technician B says that ail power should be removed from a circuit before testing the circuit with C. an open circuit between the solenoid and the ignition switch D. an open in the solenoid ground circuit - CORRECT ANSWER-B. Worn or missing fly-wheel ring gear teeth may not enable the starter to crank the engine, hut would not cause the starter itself to be inoperative. All of the other choices could prevent the starter from operating. A power seat system is extremely noisy when operated. All of the following could be the cause EXCEPT a: A, faulty motor B. faulty transmission C. bad ground D. lack of lubricant - CORRECT ANSWER-C. While a bad ground would disable the system or make the power seat operate slowly, it would not be the cause of noisy operation. All of these are true statements regarding air bag supplemental restraint systems (SRS) EXCEPT: A. While removed from the vehicle, the airbag module should be stored with the cover pad facing up. B, Safety glasses should be worn when servicing the air bag system. C. Only rosin core solder and heat shrink tubing should be used to repair air bag system wiring. D. Performing tests Improperly or using the wrong equipment can result In accidental air bag deployment. - GORRECTANGWERC. Air bag system wiring harnesses should not be repaired and only replaced. All of the other answers are true statements regarding air bag systems. All of these are used when applying Ohm's Law EXCEPT: A, amperes (i) B. watts (W) C. ohms CR) D. voltage CE) - SORRECIAINSWEREB. The components of Ohm's Law include voltage (E), amperes (1) and ohms {R), t Technician A says that the rectifier bridge consisting of six diodes changes DC to AC voltage. Technician B says that an externally grounded alternator can be full-fielded by grounding the field terminal. Who is right? A, Technician A only B, Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER -B. The rectifier bridge changes AC voltage to DC voltage. To test an externally grounded alternator, make sure all lights and accessories are off. Set the engine rpm to 1500- 2000 rpm. Now ground the field according to the manufacturer's recommended procedure. Full amperage output should be indicated if the alternator is in good condition and being driven properly. Technician A says that voltage in a series circuit should be the same at all loads of the circuit. Technician B says that current In a series circuit is the sum of all the components’ current draw in a circuit. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER -D. Total voltage in a series circuit is equal to the sum of the voltages across the separate resistances. Total current in a series circuit is the same throughout left sides. D. there is a short in the motor. - CORRECT ANSWER -C. A fuse normally blows because of high current draw. A typical cause for a blown fuse is a short circuit. A short may occur in the wiring or motor itself. Ifa window is binding in its track, the motor will tend to draw an excessive amount of current, This high current draw may cause the circuit breaker to trip or a fuse to blow. The problem may also cause motor damage. An open circuit will draw zero current and therefore, would not be a cause for the blown fuse. A horn makes a very weak sound. Technician A says a faulty power connection could be the cause. Technician B says a faulty fuse could be the cause. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER. A. If horn sound is a weak tone, current is too low, and poor electrical connections may be the culprit, Ifa fuse is blown, the horn will not sound at all. Two lights are connected in parallel. An additional light is added, also wired in parallel. Technician A says the cotal resistance will decrease. Technician B says the total voltage will drop. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- GORREGINANSWERLA. Adding an additional path chrough which the current can flow has decreased the total resistance of the circuit. Each light drops 12 volts. An ohmmeter is being used to check a circuit for continuity. Technician A says an infinity or full scale reading on an ohmmeter indicates no continuity. Technician B says a zero reading on an ochmmeter indicates continuity. Who is right? A, Technician A only B, Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER -C. An infinity reading indicates an open wire; a zero or low reading indicates a good connection, Neither of the low beam headlights on a vehicle will light but che high beams work normally. Technician A says the headlight thermal breaker could be faulty.. Technician B says the dimmer switch may be faulty. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- GORREGIANSWERL-B. The headlight switch and breaker would also affect the high beams. The dimmer switch would affect both low beam headlights. The front and rear turn signals on the left side of a vehicle are non-functional. Technician A says the turn signal flasher could be shorted to ground. Technician B says the hazard flasher could be shorted to ground. Who is right? A. Technician A only Technician A says thac if the washer pump ground circuit (as shown above, pg 87) is faulty, the wiper motor will noc cun. Technician B says that che wiper motor shown will continue to run after the switch is opened until che park switch also opens. Who is right? A, Technician A only B. Technician B only C, Both A and B D. Neither A or B- CORRECT ANSWER -B. Tech A states that a bad washer motor ground will prevent the wiper motor from working. This is wrong. The washer motor ground serves as a ground for the washer motor and would not affect the action of the wiper motor. Tech B explains the wiper motor park circuit shown in the illustration. The wiper mocor will continue to run after the switch is opened until che cam opens the park switch. Technician A says that a self-resetting circuit breaker is sometimes used in a taillight ciecuic. Technician B says that the colored insulation of a fusible link indicates the amount of circuit protection available. Who is right? A, Technician A only B. Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER -B. Resetting circuit breakers are not used in taillight circuits. Fusible links are often identified by colored insulation-red, pink, brown, yellow, etc. The color indicates the amount of maximum. circuit protection available. Technician A says that a test tight is a good diagnostic tool for testing solid-state electronic circuits. Technician B says that an ohmmeter is a good diagnostic tool for testing voltage sources. Who is right? A. Technician A only B. Technician B only C. Both A and B D. Neither A or B- CORRECT ANSWER-D. A test light may overload electrical circuits that contain solid- state components. Because an ohmmeter has its own battery, any circuit being tested should be disconnected from its voltage source. When performing soldering, the purpose of a soldering iron is to heat the: A. flux. B, solder. C. conductors. D, heat shrink tubing, - GORREGIPANSWERL-C. Contrary to popular belief, the purpose of the soldering iron is not to mele the solder itself, buc rather co heat the parts being soldered. Technician A says that a digital chmmeter should be manually set to "zero" after the switch is curned on. Technician B says that the resistance of a component should be checked while voltage is applied to the circuit, Who is righ? A. Technician A only B. Technician B only C. Both A and B