Question

13.) which of these could cause a starter motor to make a grinding noise during cranking?
ca. combed solenoid contacts
cb. worn starter brushes
cc. a weak battery
cd. worn flywheel teeth

Explanation:

When the flywheel teeth are worn, the starter motor pinion may not engage properly with the flywheel. This mis - engagement causes a grinding noise during cranking. Combed solenoid contacts would more likely cause electrical issues like no - start or intermittent starting. Worn starter brushes can lead to starting problems such as slow cranking or no cranking at all. A weak battery would cause slow cranking or no cranking due to insufficient voltage, not a grinding noise.

Answer:

D. Worn flywheel teeth