Session 1: Invention of Wheel
Unit 1: History and Evolution of Automobiles
A. Fill in the blanks
1. ………………is considered as one of the most important mechanical inventions of all times.
Ans: Wheel
2. The wheel was invented in ………………….. in around 3500 BCthat is years ago.
Ans: Mesopotamia
3. A wheel is a …………….. component that can rotate on its centre.
Ans: circular
4. A wheel is a ……………… that enables efficient movement of an…………………… across a surface where there is a force pressing it to thesurface.
Ans: device, object
5. The coefficient of friction at the interface of wheel is usually………………. .
Ans: low
B. Multiple choice questions
1. How many years ago was the wheel invented?
(a) 2500 years
(b) 3500 years
(c) 5000 years
(d) 6000 years
Ans: (c) 5000 years
2. A spoked wheel is used for which category of vehicle?(a) Light
(b) Medium
(c) Heavy
(d) None of the above
Ans: (a) Light
3. Axle of wheel is fitted in the wheel in the………………….
(a) top
(b) bottom
(c) centre
(d) side
Ans: (c) centre
C. Short answer questions
1. Define a wheel’s structure.
Ans: A wheel consists of a circular rim, a hub at the centre, and spokes ora solid disc connecting the hub to the rim. It rotates around an axle to allowmovement.
2. List the different types of wheels used in transport with examples.
Ans: Different types of wheels used in transport are:
Solid wheels used in handcarts and trolleys,
Spoked wheels used in bicycles and motorcycles,
Alloy wheels used in cars,
Steel wheels used in heavy vehicles like trucks and buses.
