1. Which of the following is not a type of simple machine?
A) Lever
B) Pulley
C) Gear
D) Inclined plane
Answer: C) Gear
2. A lever with the fulcrum in the middle is called:
A) First-class lever
B) Second-class lever
C) Third-class lever
D) None of these
Answer: A) First-class lever
3. The mechanical advantage of an ideal pulley system is equal to:
A) Number of pulleys used
B) Number of ropes supporting the load
C) Weight of the load
D) Force applied
Answer: B) Number of ropes supporting the load
4. Which simple machine is used to split wood?
A) Wedge
B) Screw
C) Lever
D) Pulley
Answer: A) Wedge
5. A screw is essentially a:
A) Wedge wrapped around a cylinder
B) Inclined plane wrapped around a cylinder
C) Lever in rotation
D) Pulley with threads
Answer: B) Inclined plane wrapped around a cylinder
6. A crowbar is an example of:
A) Wheel and axle
B) Lever
C) Pulley
D) Inclined plane
Answer: B) Lever
7. Which of the following increases the distance over which a force is applied?
A) Inclined plane
B) Pulley
C) Lever
D) Wedge
Answer: A) Inclined plane
8. In a second-class lever, the load is located:
A) Between fulcrum and effort
B) Between effort and fulcrum
C) At the fulcrum
D) None of these
Answer: A) Between fulcrum and effort
9. A wheelbarrow is an example of:
A) First-class lever
B) Second-class lever
C) Third-class lever
D) Pulley system
Answer: B) Second-class lever
10. A fishing rod is an example of:
A) First-class lever
B) Second-class lever
C) Third-class lever
D) Wedge
Answer: C) Third-class lever
11. The mechanical advantage of a simple machine is defined as:
A) Output force ÷ Input force
B) Input force ÷ Output force
C) Work done ÷ Distance moved
D) Distance moved ÷ Work done
Answer: A) Output force ÷ Input force
12. Which simple machine is used in a car jack?
A) Lever
B) Wedge
C) Screw
D) Pulley
Answer: C) Screw
13. A flagpole uses which simple machine to raise a flag?
A) Lever
B) Pulley
C) Wheel and axle
D) Inclined plane
Answer: B) Pulley
14. A knife is an example of a:
A) Lever
B) Pulley
C) Wedge
D) Screw
Answer: C) Wedge
15. Which class of lever always has the effort between fulcrum and load?
A) First-class
B) Second-class
C) Third-class
D) None
Answer: C) Third-class
16. The fulcrum of a seesaw is located at:
A) One end
B) Middle
C) Between load and effort
D) None
Answer: B) Middle
17. Inclined planes reduce:
A) Force but increase distance
B) Distance but increase force
C) Force and distance
D) Energy
Answer: A) Force but increase distance
18. Which simple machine converts rotational motion into linear motion?
A) Lever
B) Pulley
C) Screw
D) Wedge
Answer: C) Screw
19. A doorknob is an example of:
A) Wheel and axle
B) Pulley
C) Lever
D) Inclined plane
Answer: A) Wheel and axle
20. Pulleys are mainly used to:
A) Increase force
B) Change direction of force
C) Reduce friction
D) Increase work
Answer: B) Change direction of force
21. A hammer removing a nail acts as a:
A) First-class lever
B) Second-class lever
C) Third-class lever
D) Inclined plane
Answer: A) First-class lever
22. A ramp is an example of a:
A) Wedge
B) Inclined plane
C) Pulley
D) Lever
Answer: B) Inclined plane
23. Which of the following is a compound machine?
A) Lever
B) Bicycle
C) Pulley
D) Screw
Answer: B) Bicycle
24. The axle of a wheel and axle system is:
A) Stationary
B) Rotating along with wheel
C) Always the load
D) None of these
Answer: B) Rotating along with wheel
25. A nut and bolt are examples of:
A) Wedge
B) Screw
C) Lever
D) Pulley
Answer: B) Screw
26. A scissors uses which simple machines?
A) Two wedges
B) Two levers
C) Lever and wedge
D) Pulley and wedge
Answer: C) Lever and wedge
27. Which type of lever provides a mechanical advantage greater than 1?
A) First-class lever with fulcrum in the middle
B) Second-class lever
C) Third-class lever
D) None
Answer: B) Second-class lever
28. The main purpose of a wedge is to:
A) Lift objects
B) Split or cut objects
C) Move objects
D) Change direction of motion
Answer: B) Split or cut objects
29. A pulley fixed to the ceiling is called:
A) Movable pulley
B) Fixed pulley
C) Block and tackle
D) None
Answer: B) Fixed pulley
30. Mechanical advantage of an ideal inclined plane is equal to:
A) Length of plane ÷ height of plane
B) Height ÷ length of plane
C) Force ÷ distance
D) Distance ÷ Force
Answer: A) Length of plane ÷ height of plane