1) What factor contributed most to the acceleration of the development of automobile?

Answer: The introduction of Internal Combustion Engines.

2) Who produced a tricycle with an I.C engine 1n 1885-86?

Answer: Karl Benz.

3) Who built the first motor-cycle?

Answer: Gottlieb Daimler.

4) The first four-wheeler powered by an I.C engine was built by whom?

Answer: Siegfried Marcus.

5) Who built the first gasoline automobile which incorporated many of the essential features of the modern car?

Answer: Arthur Constantin Krebs.

6) In which year was the Panhard Car designed?

Answer: 1894.

7) What is called the type of body of a car, of which the top is fabric and could be folded down?

Answer: Convertible.

8) What determines the driving thrust (speed) of a vehicle?

Answer: The torque applied at the wheel.

9) What part or device is used to control the speed of a vehicle?

Answer: Accelerator.

10) Name the steel bar which functions by twisting within a vehicle machine?

Answer: Torsion bar.