EEI TECH EEI Tech Mechanical Concept 5

Question 1

A worm gear driving a worm wheel is commonly used because it:

Accepted Answer

Provides a large speed reduction in a compact space

Answer

Worm gears give a high gear ratio and large speed reduction in a small package.

Question 2

When a moving object collides and stops, its kinetic energy is mainly converted into:

Accepted Answer

Heat, sound, and deformation

Answer

Energy is conserved and converts mostly to heat, sound, and material deformation on impact.

Question 3

A container of water has a small hole near the bottom and another near the top. Water sprays out:

Accepted Answer

Faster from the bottom hole

Answer

Greater depth means greater water pressure, so the bottom hole sprays faster and farther.

Question 4

Which of these increases the mechanical advantage of an inclined plane?

Accepted Answer

Making the ramp longer for the same height

Answer

A longer ramp for the same rise reduces required force, increasing mechanical advantage.

Question 5

A gear train has a driver of 12 teeth meshing with a gear of 36 teeth. The torque on the driven gear, compared to the driver, is:

Accepted Answer

3 times greater

Answer

Torque increases with the gear ratio: 36/12 = 3 times greater on the driven gear.

EEI TECH Test Practice Test