ASE A6 Test Prep (Electrical & Electronic Systems) exam

Technician A only A technician connects one lead of a DMM (digital multimeter) to the positive (+) terminal of a battery and the other meter lead to the "B" terminal of the starter solenoid and then cranks the engine. During cranking, the voltmeter displays a reading of 878 mV. Technician A says this reading indicates the positive battery cable has very high resistance. Technician B says this reading indicates that the starter armature is defective. Who is right? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B Replace the battery When performing a load test on a battery, a technician finds that the battery voltage drops below specifications. Which of the following is the MOST likely repair? a. Recharge the battery and return it to service b. Recharge the battery and retest it c. Replace the battery d. Replace the voltage regulator Technician A only Two technicians are describing battery charging. Technician A says to remove the surface charge from a recently charged battery and apply a 300-ampere load across the adapters for 15 seconds. Technician B says to remove the surface charge from batteries, which have been in storage. Who is right? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B Technician A only A technician connects one lead of a DMM (digital multimeter) to the positive (+) terminal of a battery and the other meter lead to the "B" terminal of the starter solenoid and then cranks the engine. During cranking, the voltmeter displays a reading of 878 mV. Technician A says this reading indicates the positive battery cable has very high resistance. Technician B says this reading indicates that the starter armature is defective. Who is right? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B Technician B only Technician A says proper starter operation depends on the battery being at a 95% charge and battery cables being of the correct size (gauge) and having no more than 0.8-volt drop. Technician B says voltage-drop testing includes cranking the engine, measuring the drop in voltage from the battery to the starter, and measuring the drop in voltage from the negative terminal of the battery to the engine block. Who is right? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B Defective starter drive Which of the following could cause the starter to make a whining noise when engaged? a. Defective starter drive b. Defective solenoid c. Open pull-in winding d. Worn armature commutator Neither Technician A nor B Two bulbs are connected in parallel to a 12 volt battery. Another bulb is added in parallel. Technician A says that the third bulb will be dimmer than the other two bulbs due to reduced current flow through the filament of the bulb. Technician B says that the amount of current flowing from the battery will decrease due to the extra load. Who is right? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B Technician B only Two bulbs are connected in parallel to a 12 volt battery. One bulb has a resistance of 6 ohms and the other has a resistance of 2 ohms. Technician A says that only the 2 ohm bulb will light because all the current will flow through the 6 ohms bulb. Technician B says that the 6 ohm bulb will be dimmer than the 2 ohm bulb. Who is right?