ASVAB Mechanical Comprehension Test

Question 1

How much force is needed to lift the 10Kg weight?

Accepted Answer

5 Kg

Answer

This question likely refers to a simple machine, such as a pulley system, designed to provide mechanical advantage. If the system has a mechanical advantage of 2, it means the force required to lift the weight is halved. Therefore, to lift a 10 Kg weight, only 5 Kg of force would be needed.

Question 2

The smaller gear has 8 teeth, and the larger gear has 16 teeth. When the larger gear makes 12 revolutions, how many revolutions will the smaller gear make?

Accepted Answer

24

Answer

The relationship between two meshed gears is inversely proportional to their number of teeth. Since the larger gear has 16 teeth and the smaller gear has 8 teeth, the smaller gear will rotate twice for every single rotation of the larger gear. Therefore, if the larger gear makes 12 revolutions, the smaller gear will make 12 * 2 = 24 revolutions.

Question 3

Which of the following is the basis for Pascal’s Law?

Accepted Answer

The amplification of force in a hydraulic system.

Answer

Pascal's Law states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere. This principle is the fundamental basis for how hydraulic systems work, allowing a small force applied over a small area to generate a much larger force over a larger area, thus amplifying force.

Question 4

An 80-lb child is sitting on one end of a seesaw. If another 80-lb child jumps from a high platform onto the other end of the seesaw, what will happen?

Accepted Answer

The first child will be lifted into the air, but remain seated.

Answer

When the second 80-lb child jumps onto the seesaw, their momentum is transferred to the seesaw and the first child. While the impact will cause the seesaw to move rapidly, the first child, being seated and having the same weight, will be lifted into the air due to this transfer of energy and momentum, rather than bouncing off completely.

Question 5

What is a vector quantity?

Accepted Answer

Gravity

Answer

A vector quantity is a physical quantity that possesses both magnitude (size) and direction. Gravity is a force, and forces are inherently vector quantities because they act in a specific direction (towards the center of mass) and have a measurable strength. In contrast, options like magnitude, volume, and mass are scalar quantities, which only have magnitude and no associated direction.

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB Mechanical Comprehension Test