Question

The petrol engine was invented by:
(A) Nikolaus Otto
(B) James Watt
(C) Rudolf Diesel
(D) None of these

Answer 1

Hint
Nikolaus Otto was a German engineer who successfully developed a combustion engine which ran on petroleum gas. This led on to the invention of the modern internal combustion engine. This engine was a four-stroke combustible engine which replaced the steam engines as power sources.

Complete step by step answer
Nikolaus Otto a German engineer developed a four stroke internal combustion engine. This offered a practical alternative to other engines that used steam as a power source. This engine uses a spark to ignite the air mixture and gasoline is compressed by the piston in the cylinder.
Hence, the correct option is (A).

Note
The first diesel engine was invented by Rudolf diesel and was named after him only. Diesel and petrol engines are different in the way of flame ignition in their cylinders. The diesel engine is also called a compression ignition engine whereas the petrol engine is called a spark ignition engine. In a 4-stroke diesel engine, the fuel air mixture comes into the chamber and the piston compresses it into the mix. Diesel has a low ignition temperature and when gases compress, they heat up. This heating causes the mix to explode pushing the piston downwards and generating torque.