Free ASVAB Practice Tests

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Sample Practice Test Questions

General Science

Which of these layers is found directly below the Earth's crust?

mantle

The crust is the Earth's outermost layer and is divided into oceanic and continental types. Oceanic crust is 3 miles (5 km) to 6 miles (10 km) thick and is composed primarily of denser rock. Continental crust is 20 to 30 miles (30 to 50 km) thick and composed primarily of less dense rock. The crust makes up approximately one percent of the Earth's total volume.

Mechanical Comprehension

Which of the following surfaces would have the lowest coefficient of friction?

ice

Coefficient of friction (μ) represents how much two materials resist sliding across each other.  Smooth surfaces like ice have low coefficients of friction while rough surfaces like concrete have high μ.

Automotive Information

Which of the following is not part of an engine's cooling system?

air conditioner

The purpose of an automobile engine's cooling system is to circulate coolant around the engine so it can absorb and dissipate heat. The water pump pumps coolant through the various components in the system and the radiator cools down coolant after it has heated up after passing through the engine. The thermostat controls the flow of coolant based on engine temperature while the cooling fan draws air through the radiator when the car isn't moving fast enough for unforced air to cool things down on its own.

Word Knowledge
Jennifer's outspoken criticism of the meal disoncerted the waiter.
unnerve
To throw into confusion.
Word Knowledge
Clarity most nearly means:
lucidity
Clearness.
General Science

In the metric system, what prefix represents 10-3?

milli

In the metric system, milli is the prefix for 10-3.

Automotive Information

For inline cylinder arrangements in an engine, how are the cylinders numbered?

sequentially from the front of the engine to the back

Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.

Math Knowledge

Solve for b:
b2 - 5b - 6 = 0

-1 or 6

The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

b2 - 5b - 6 = 0
(b + 1)(b - 6) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (b + 1) or (b - 6) must equal zero:

If (b + 1) = 0, b must equal -1
If (b - 6) = 0, b must equal 6

So the solution is that b = -1 or 6

Word Knowledge
Allison's painting met with plaudits from the critics, who had dismissed her earlier work.
kudos
Enthusiastic approval.
Shop Information

This tool is a(n) __________.

punch

A punch is narrow and is used to drive objects like nails (pin punch) or for making guide marks for drilling (center punch) or patterns in wood or metal.