Free ASVAB Practice Tests

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Sample Practice Test Questions

General Science

Which of the following does not filter air as part of the respiratory system?

epiglottis

After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis which prevents food from entering the airway.

Automotive Information

Engines with radial cylinder configurations are most common in:

aircraft engines

A radial arrangement places cylinders in a circle around the crankshaft and is used almost exclusively in aircraft engines.

Math Knowledge

On this circle, line segment CD is the:

radius

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

Word Knowledge
Opportune most nearly means:
propitious
Suitable or convenient.
Math Knowledge

Solve for z:
2z + 2 < 8 - 8z

z < \(\frac{3}{5}\)

To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.

2z + 2 < 8 - 8z
2z < 8 - 8z - 2
2z + 8z < 8 - 2
10z < 6
z < \( \frac{6}{10} \)
z < \(\frac{3}{5}\)

Word Knowledge
Finite most nearly means:
limited
Having definite limits.
Word Knowledge
Even though I forgot his birthday, I hoe my father accepts my belated card.
tardy
Past the normal or proper time.
Electronics Information

Why does current in an electric circuit create heat?

heat is created when the current overcomes resistance in the wire

Current in an electric circuit creates heat when the current overcomes resistance in the wire.

Automotive Information

Which of the following is the result of the air-fuel mixture exploding instead of burning?

detonation

Normal combustion in an engine is initiated by a spark plug and results in the complete burning of the air-fuel mixture. If combustion is initiated by a source other than the spark plug, by a hot spot in the cylinder or combustion chamber for example, pre-ignition results. Detonation results if the air-fuel mixture explodes instead of burning. Detonation can cause extremes in pressure in the combustion chamber leading to engine damage.

Mechanical Comprehension

Which of the following is the formula for hydraulic pressure?

P = F/A

Hydraulics is the transmission of force through the use of liquids. Liquids are especially suited for transferring force in complex machines because they compress very little and can occupy very small spaces. Hydraulic pressure is calculated by dividing force by the area over which it is applied: P = F/A where F is force in pounds, A is area in square inches, and the resulting pressure is in pounds per square inch (psi).