Mechanical Aptitude FREE Mechanical Aptitude Knowledge Question and Answers 2

Question 1

A worker needs to lift a 200-pound load using a single fixed pulley. How much force must the worker apply to the rope?

Accepted Answer

200 pounds

Answer

A single fixed pulley changes the direction of force but does not provide a mechanical advantage, so the full 200 pounds must be applied.

Question 2

Which type of gear arrangement is used to transmit motion between two shafts that are perpendicular to each other?

Accepted Answer

Bevel gears

Answer

Bevel gears have cone-shaped teeth and are specifically designed to transmit rotational motion between intersecting shafts at an angle, typically 90 degrees.

Question 3

If a hydraulic system has an input piston area of 2 square inches and an output piston area of 10 square inches, what is the mechanical advantage?

Accepted Answer

5

Answer

Mechanical advantage in a hydraulic system equals the output piston area divided by the input piston area: 10 / 2 = 5.

Question 4

A spring with a spring constant of 50 N/m is compressed 0.2 meters. What force does the spring exert?

Accepted Answer

10 N

Answer

Using Hooke's Law (F = kx), the force is 50 N/m multiplied by 0.2 m, which equals 10 N.

Question 5

In a belt-and-pulley system, the driver pulley has a diameter of 8 inches and the driven pulley has a diameter of 4 inches. If the driver turns at 100 RPM, how fast does the driven pulley rotate?

Accepted Answer

200 RPM

Answer

The speed ratio is inversely proportional to the diameter ratio, so the driven pulley spins at (8/4) x 100 = 200 RPM.

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Test Practice Test

Mechanical Aptitude FREE Mechanical Aptitude Knowledge Question and Answers 2