ASVAB Mechanical Comprehension Practice Test 522414

Questions 5
Topics Bridge Forms, Gear Ratio, Inclined Plane, Inertia, Mechanics

Study Guide

Bridge Forms

The six basic bridge forms are beam, truss, arch, cantilever, cable, and suspension.

Gear Ratio

The mechanical advantage (amount of change in speed or torque) of connected gears is proportional to the number of teeth each gear has. Called gear ratio, it's the ratio of the number of teeth on the larger gear to the number of teeth on the smaller gear. For example, a gear with 12 teeth connected to a gear with 9 teeth would have a gear ratio of 4:3.

Inclined Plane

An inclined plane is a simple machine that reduces the force needed to raise an object to a certain height. Work equals force x distance and, by increasing the distance that the object travels, an inclined plane reduces the force necessary to raise it to a particular height. In this case, the mechanical advantage is to make the task easier. An example of an inclined plane is a ramp.

Inertia

The more mass a substance has the more force is required to move it or to change its direction. This resistance to changes in direction is known as inertia.

Mechanics

Mechanics deals with motion and the forces that produce motion.