The MAXIMUM allowable voltage drop in an automotive starter ground circuit while cranking the engine is

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the NOCTI Automotive Test. Explore a wide range of questions with hints and thorough explanations. Boost your knowledge for automotive excellence and achieve your certification!

Multiple Choice

The MAXIMUM allowable voltage drop in an automotive starter ground circuit while cranking the engine is

Explanation:
When the starter cranks, a large current flows through the ground path back to the battery. Any resistance in that ground connection wastes some of the battery voltage as a voltage drop, which lowers the voltage the starter actually gets. Keeping this ground drop very small is essential to ensure the starter produces enough torque to crank the engine. The maximum acceptable value for that ground drop is about 0.2 volts. If you see more than that, the ground path is likely too resistive due to corroded or loose connections, a damaged ground strap, or inadequate contact to the engine block or chassis. Addressing these grounds—cleaning terminals, tightening connections, or upgrading the ground strap—helps restore proper cranking performance. To check it, measure the voltage between the engine block (or starter mounting point) and the battery negative while someone cranks the engine. It should stay at or below roughly 0.2 volts.

When the starter cranks, a large current flows through the ground path back to the battery. Any resistance in that ground connection wastes some of the battery voltage as a voltage drop, which lowers the voltage the starter actually gets. Keeping this ground drop very small is essential to ensure the starter produces enough torque to crank the engine.

The maximum acceptable value for that ground drop is about 0.2 volts. If you see more than that, the ground path is likely too resistive due to corroded or loose connections, a damaged ground strap, or inadequate contact to the engine block or chassis. Addressing these grounds—cleaning terminals, tightening connections, or upgrading the ground strap—helps restore proper cranking performance.

To check it, measure the voltage between the engine block (or starter mounting point) and the battery negative while someone cranks the engine. It should stay at or below roughly 0.2 volts.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy