Free ASVAB Practice Tests | ASVAB Test Bank

Word Knowledge

Futile most nearly means:

hopeless

Without purpose, completely ineffective.

General Science

As a cold front moves into an area, the heavier cool air __________ the lighter warm air that it is replacing.

pushes under

A cold front is a warm-cold air boundary with the colder air replacing the warmer. As a cold front moves into an area, the heavier cool air pushes under the lighter warm air that it is replacing. The warm air becomes cooler as it rises and, if the rising air is humid enough, the water vapor it contains will condense into clouds and precipitation may fall.

General Science

Earth's history is divided into time periods, which of these is the shortest time period?

age

The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.

Math Knowledge

Find the value of a:
5a + z = -1
-2a - 3z = -3

-$\frac{6}{13}$

You need to find the value of a so solve the first equation in terms of z:

5a + z = -1
z = -1 - 5a

then substitute the result (-1 - 5a) into the second equation:

-2a - 3(-1 - 5a) = -3
-2a + (-3 x -1) + (-3 x -5a) = -3
-2a + 3 + 15a = -3
-2a + 15a = -3 - 3
13a = -6
a = $ \frac{-6}{13} $
a = -$\frac{6}{13}$

Automotive Information

The catalytic converter output consists primarily of:

water and carbon dioxide

The catalytic converter converts pollutants in exhaust gas into less pollutant substances like carbon dioxide and water.

Word Knowledge

They were ecstatic when their team won the championship game in the last second.

overjoyed

Overwhelmingly emotional.

Word Knowledge

Implement most nearly means:

execute

To carry out or accomplish.

General Science

"The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object." This describes which of Newton's laws of motion?

second

Newton's second law of motion states that The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. This law basically means that the greater the mass of an object, the more force is needed to overcome its inertia.

Math Knowledge

$4$ \sqrt{2} $$

If the area of this square is 16, what is the length of one of the diagonals?

4$ \sqrt{2} $

To find the diagonal we need to know the length of one of the square's sides. We know the area and the area of a square is the length of one side squared:

a = s²

so the length of one side of the square is:

s = $ \sqrt{a} $ = $ \sqrt{16} $ = 4

The Pythagorean theorem defines the square of the hypotenuse (diagonal) of a triangle with a right angle as the sum of the squares of the other two sides:

c² = a² + b²
c² = 4² + 4²
c² = 32
c = $ \sqrt{32} $ = $ \sqrt{16 x 2} $ = $ \sqrt{16} $ $ \sqrt{2} $
c = 4$ \sqrt{2} $

Automotive Information

What combines the suspension spring and shock absorber into one unit?

strut

Because a compressed spring will extend violently, shock absorbers must be used to dampen the spring’s compression and extension cycles. Struts combine the spring and shock into one unit