Imp Questions For All Chapters – General Science Class 6
Simple Machines
Short Questions
1. What is a simple machine?
Answer : A tool that makes work easier.
2. Give one example of a simple machine.
Answer : Lever.
3. What is a complex machine?
Answer : A machine made of many simple machines.
4. Give one example of a complex machine.
Answer : Bicycle.
5. What is a lever used for?
Answer : To lift or move loads.
6. How many types of levers are there?
Answer : Three.
7. What is the fulcrum in a lever?
Answer : The point where the lever rotates.
8. Which machine is used to lift water from a well?
Answer : Pulley.
9. What type of machine is a knife?
Answer : Wedge.
10. Which part of a bicycle is a wheel and axle?
Answer : The pedal and wheels.
11. Which machine is used to cut wood?
Answer : Axe.
12. What is an inclined plane?
Answer : A sloping surface that helps lift objects.
13. Give one example of an inclined plane.
Answer : A ramp.
14. What is a pulley made of?
Answer : A grooved wheel and a rope.
15. Why do we maintain machines?
Answer : To prevent damage and keep them working.
Long Questions
1. What is a lever? Explain its parts.
Answer : A lever is a simple machine used to lift or move loads. It has three parts: fulcrum (the support), load (the object being lifted), and effort (the force applied).
2. What is a pulley? How does it help?
Answer : A pulley is a simple machine with a wheel and a rope. It helps lift objects by changing the direction of force, making work easier.
3. What is an inclined plane? Give an example.
Answer : An inclined plane is a sloping surface that helps move heavy objects with less effort. Example: A ramp used to load heavy boxes onto a truck.
4. Why are traveller’s bags fitted with wheels?
Answer : Wheels reduce friction, making it easier to move heavy bags without much effort.
5. Why is a bicycle called a complex machine?
Answer : A bicycle has many simple machines like levers (brakes), pulleys (chain), and wheel and axle (wheels), working together to make riding easier.
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