Mechanical Aptitude FREE Mechanical Aptitude Ultimate Question and Answers 3

Question 1

A wheelbarrow is an example of which class of lever?

Accepted Answer

Second-class lever

Answer

First-class lever

Answer

Third-class lever

Answer

It is not a lever

Question 2

Two meshing gears have 15 and 45 teeth respectively. If the smaller gear rotates at 900 RPM, how fast does the larger gear rotate?

Accepted Answer

300 RPM

Answer

900 RPM

Answer

2,700 RPM

Answer

450 RPM

Question 3

A pipe with a 1-inch diameter narrows to a 0.5-inch diameter. According to the continuity principle, what happens to the fluid velocity in the narrower section?

Accepted Answer

It increases by a factor of 4

Answer

It doubles

Answer

It stays the same

Answer

It decreases by half

Question 4

Which of the following materials would be the best conductor of heat?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Concrete

Question 5

A screw has 8 threads per inch. What is the mechanical advantage if the screwdriver handle has a circumference of 4 inches?

Accepted Answer

32

Answer

8

Answer

4

Answer

16

Question 6

An object is placed on a ramp inclined at 30 degrees. Ignoring friction, what fraction of the object's weight acts as a force pulling it down the ramp?

Accepted Answer

One-half

Answer

One-quarter

Answer

Three-quarters

Answer

The full weight