Wright Brothers: Air crafts: : Locomotives: ………….

Who noticed that steam had so much strength that it could move enormous weight?

Which of the following is cheaper and less polluting?

In 1840 a method of laying road using broken stones was devised by

Who noticed that steam had so much strength that it could move enormous weight?

During ………….. A.D. machines and steam power began to be increasingly used to produce goods.

In the ………. century the industrial workers of Europe had to face several hardships.

The working hours in industries in the 19th century.

Who is known as the father of white revolution in India?

Who invented the first known printing press and where?