1.
What is the primary purpose of a flywheel in a mechanical system?
To increase speed
To store energy
To decrease weight
To change direction
2.
A hydraulic system uses a small piston to exert a large force on a larger piston. If the small piston has an area of 2 square inches and the large piston has an area of 10 square inches, what is the mechanical advantage of the system?
0.2
2
5
10
3.
What is the mechanical advantage of an inclined plane that is 12 feet long and 4 feet high?
3
4
12
48
4.
In a pulley system, what happens to the force required to lift a load when the number of pulleys is increased?
It increases
It decreases
It remains the same
It becomes zero
5.
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
6.
A gear system consists of a small gear with 10 teeth and a larger gear with 40 teeth. If the small gear turns once, how many times does the larger gear turn?
1/4
1/2
1
4
7.
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
8.
Which type of energy is primarily converted to mechanical energy in an internal combustion engine?
Thermal energy
Electrical energy
Kinetic energy
Potential energy
9.
Which of the following materials is the LEAST conductive of heat?
Copper
Aluminum
Steel
Wood
10.
A lever is used to lift a heavy object. If the distance from the fulcrum to the point where the force is applied is doubled, what happens to the amount of force needed to lift the object?
It is halved.
It remains the same.
It is doubled.
It is quadrupled.
Questions Answered: 0/10