Automotive Elect. & Elec. Equip. (part 2)?

11 Answer:


Technician A says the spark occurs when the contact points open.


Technician B says the spark occurs when the coil magnetic field


collapses. Who is right?


a. A only


b. B only


c. both A and B


d. neither A nor B





12 Answer:


The heat range of a spark plug is primarily determined by


a. the depth the electrodes enter the combustion chamber


b. the length of the lower insulator


c. the number of ribs on the upper insulator


d. the gap between the electrodes





13 Answer:


Technician A says a Hall-effet switch uses the presence or absence of


a magnetic field to switch a supplied voltage on and off. Technician


B says the Hall-effect voltage switches on when a steel blade


enters the air gap of a Hall-effect switch. Who is right?


a. A only


b. B only


c. both A and B


d. neither A nor B





14 Answer:


Technician A says a light beam from a photodiode can switch an LED off


and on. Technician B says a photodiode uses the presence 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





15 Answer:


To determine if the primary circuit is opening and closing, make a


a. triggering test with a digital logic probe


b. spark test at the ends of the spark-plug cables


c. voltage test at the battery


d. test of the coil primary-winding resistance





16 Answer:


In an electronic distributor with vacuum advance, hesitation and


stumbling during acceleration may be caused by


a. an inoperative vacuum-advance unit


b. an intermittent open in the pickup-coil leads


c. an inoperative centrifugal-advance mechanism


d. a defective electronic control module (ECM)





17 Answer:


A new spark plug of the proper heat range runs about 2,000 miles


(3,000 km). Removing the plug shows the lower end of the center


electrode melted away. Technician A says the cause is preignition.


Technician B says to check for combustion-chamber deposits and cross-


firing. Who is right?


a. A only


b. B only


c. both A and B


d. neither A nor B





18 Answer:


After replacing a headlamp, the driver complains that the new headlamp


is dim. Technician A says a halogen headlamp has been installed in


place of a standard headlamp. Technician B says a standard headlamp has


been installed in place of a halogen headlamp. Who is right?


a. A only


b. B only


c. both A and B


d. neither A nor B





19 Answer:


The turn signals work properly in one direction but not in the other.


Which of these is the most probably cause?


a. a defective flasher


b. a defective voltage regulator


c. a blown turn-signal fuse


d. a blown bulb or poor ground on the problem side





20 Answer:


The customer complains that the windshield wipers stop when the ignition


key is turned OFF. Technician A says the time-delay is improperly


adjusted. Technician B says the wiper motor is wired to the ignition


switch and this is normal operation. Who is right?


a. A only


b. B only


c. both A and B


d. neither A nor B|||You still need to do your own homework, we have enough incompetent mechanics in the field and you'll just give the rest a bad name.