Automotive Electrical Quiz — Battery, Charging and Starting

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Question 1 1 pt

What is the nominal voltage of a typical passenger car electrical system?

6 V 12 V 24 V 48 V

Question 2 1 pt

What is the primary job of the alternator?

To crank the engine To generate electrical power and recharge the battery while the engine runs To store fuel pressure To filter electrical noise only

Question 3 1 pt

A module draws 50 mA continuously for 10 hours. How much charge does it consume, in amp-hours?

Your numeric answer

Question 4 1 pt

The starter motor converts electrical energy into…

Mechanical rotation Light Chemical energy High-voltage DC

Question 5 1 pt

Why must a fuse be matched to the circuit?

Because the fuse protects the wiring from excessive current Because a larger fuse improves performance Because the fuse sets the system voltage Because fuses are interchangeable regardless of rating

Question 6 1 pt

On a typical vehicle, what forms the return path for most electrical circuits?

The body and chassis structure The fuel tank The exhaust system only The alternator belt

Question 7 1 pt

What advantage does a relay provide in an automotive circuit?

A small control current can switch a much larger load current It increases the battery voltage It stores energy for the starter It converts AC to DC

Question 8 1 pt

A 60 W load operates on a nominal 12 V supply. What current does it draw, in amperes?

Your numeric answer

Question 9 1 pt

When jump starting a vehicle, which sequence is the safe convention?

Connect positive first, then negative, and make the final negative connection to a good ground away from the battery Connect negative first, then positive, directly to both battery posts Connect both cables to the battery posts in any order with the engines running Disconnect the battery before jump starting

Question 10 1 pt

A fully charged 12 V lead-acid battery at rest reads approximately…

10.5 V 12.6 V 14.4 V 16.0 V

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