FREE Mechanical Aptitude Principles Question and Answers Flashcards
6 cards from real MECHANICAL APTITUDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE Mechanical Aptitude Principles Question and Answers flashcards as text
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?
Answer: 75 lb
When a load is centered on a beam with two supports, each support carries exactly half the load: 150 / 2 = 75 lb.
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?
Answer: One-third the speed
The speed ratio is inversely proportional to the tooth count ratio, so the driven gear turns at 20/60 = one-third the input speed.
What type of energy is stored in a compressed spring?
Answer: Elastic potential energy
A compressed spring stores elastic potential energy that can be released when the spring returns to its natural length.
Which simple machine is represented by a doorknob?
Answer: Wheel and axle
A doorknob functions as a wheel and axle, where the knob is the wheel and the shaft is the axle, multiplying rotational force.
If you double the length of a wrench handle, what happens to the torque applied with the same force?
Answer: Torque is doubled
Torque equals force multiplied by the lever arm length, so doubling the length doubles the torque.
A ball is thrown straight up into the air. At the highest point of its trajectory, what is its velocity?
Answer: Zero
At the peak of its trajectory, the ball momentarily stops before gravity pulls it back down, making its velocity zero.