The diesel engine wrist pin in the illustration is indicated by the component labeled __________. Illustration MO-0122

Correct Answer: Option A — '7'

Component '7' in illustration MO-0122 references the wrist pin, also known as the gudgeon pin, which articulates the diesel engine piston to the small end of the connecting rod, transmitting combustion forces down to the crankshaft assembly under high mechanical and thermal stress.