Solutions German engineer who built the first petrol-engine car has 3 entries with similar clues

• 5-letter words
• chokeA valve in the carburetor of a petrol engine used to reduce the amount of air in the fuel mixture
• 18-letter words
• richard-trevithickThe English engineer who built the world's first steam railway locomotive
• 19-letter words
• karl-friedrich-benzGerman engineer and motor manufacturer