1.
Which of the following materials has the highest tensile strength?
Copper
Aluminum
Steel
Brass
2.
Which of the following is NOT a type of simple machine?
Lever
Pulley
Wheel and axle
Engine
3.
What is the primary purpose of a flywheel in a mechanical system?
To increase speed
To store energy
To decrease weight
To change direction
4.
What type of simple machine is a screw?
Lever
Wheel and axle
Inclined plane
Pulley
5.
Which of the following is an example of potential energy?
A moving car
A spinning top
A stretched rubber band
A flowing river
6.
What is the mechanical advantage of an inclined plane that is 12 feet long and 4 feet high?
3
4
12
48
7.
Which type of energy is primarily converted to mechanical energy in an internal combustion engine?
Thermal energy
Electrical energy
Kinetic energy
Potential energy
8.
What is the mechanical advantage of a pulley system with three pulleys?
1
2
3
6
9.
A block and tackle system has 4 ropes supporting the load. If the load weighs 400 pounds, what is the tension in each rope?
100 pounds
400 pounds
800 pounds
1600 pounds
10.
What type of gear system is typically used to change the direction of rotation by 90 degrees?
Spur gears
Bevel gears
Helical gears
Worm gears
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