Mechanical Aptitude FREE Mechanical Aptitude Principles Question and Answers 3

Question 1

A 150 lb person stands at the center of a 10-foot plank supported at both ends. What is the reaction force at each support?

Accepted Answer

75 lb

Answer

150 lb

Answer

100 lb

Answer

50 lb

Question 2

In a gear train, if the driving gear has 20 teeth and the driven gear has 60 teeth, how does the output speed compare to the input speed?

Accepted Answer

One-third the speed

Answer

Three times faster

Answer

Same speed

Answer

One-half the speed

Question 3

What type of energy is stored in a compressed spring?

Accepted Answer

Elastic potential energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Chemical energy

Question 4

Which simple machine is represented by a doorknob?

Accepted Answer

Wheel and axle

Answer

Lever

Answer

Inclined plane

Answer

Wedge

Question 5

If you double the length of a wrench handle, what happens to the torque applied with the same force?

Accepted Answer

Torque is doubled

Answer

Torque is halved

Answer

Torque stays the same

Answer

Torque is quadrupled

Question 6

A ball is thrown straight up into the air. At the highest point of its trajectory, what is its velocity?

Accepted Answer

Zero

Answer

Maximum

Answer

Equal to initial velocity

Answer

Negative