1.
What type of simple machine is a screw?
Lever
Wheel and axle
Inclined plane
Pulley
2.
Which type of energy is primarily converted to mechanical energy in an internal combustion engine?
Thermal energy
Electrical energy
Kinetic energy
Potential energy
3.
What is the purpose of using ball bearings in a mechanical system?
To increase friction
To reduce friction
To increase weight
To generate electricity
4.
Which of the following is NOT a type of simple machine?
Lever
Pulley
Wheel and axle
Engine
5.
In a system of gears, what happens to the speed of rotation of the output gear if it has fewer teeth than the input gear?
It rotates faster.
It rotates slower.
It does not affect speed.
It stops rotating.
6.
What is the mechanical advantage of a pulley system with three pulleys?
1
2
3
6
7.
Which of the following materials is the LEAST conductive of heat?
Copper
Aluminum
Steel
Wood
8.
What is the primary function of a flywheel in a mechanical system?
To increase speed
To store energy
To reduce friction
To change direction
9.
Which of the following is an example of a first-class lever?
Wheelbarrow
Nutcracker
Crowbar
Tweezers
10.
Two gears are meshed together. The larger gear has 40 teeth, and the smaller gear has 20 teeth. If the larger gear rotates at 60 revolutions per minute (RPM), what is the rotational speed of the smaller gear?
30 RPM
60 RPM
120 RPM
240 RPM
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