Free ASVAB Practice Tests

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Sample Practice Test Questions

Automotive Information

Too much fuel results in a __________ air-fuel mixture that burns quicker and cooler.

rich

The stoichiometric ratio defines the proper ratio of air to fuel necessary so that an engine burns all fuel with no excess air. For gasoline fuel, the stoichiometric ratio is about 14.7:1 or for every one gram of fuel, 14.7 grams of air are required. Too much air results in a lean air-fuel mixture that burns more slowly and hotter while too much fuel results in a rich mixture that burns quicker and cooler.

Word Knowledge
Ramble most nearly means:
roam
To wander, physically or in language.
Word Knowledge
Flaw most nearly means:
defect
An imperfection.
Word Knowledge
Melodious most nearly means:
dulcet
Having a pleasing melody.
Word Knowledge
Situated on a mountain, with sixteen–foot walls, the castle was inviolable.
untouchable
Secure from assault of trespass.
General Science

Which of these is not a function of bone in the human skeletal system?

store vitamins

Hard bones provide primary support for the endoskeleton while more flexible cartilage is found at the end of all bones, at the joints, and in the nose and ears. In addition to providing support and protecting bodily organs, bones also produce blood cells and store minerals like calcium.

Math Knowledge

Solve for y:
y2 + 6y - 13 = -y + 5

2 or -9

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

y2 + 6y - 13 = -y + 5
y2 + 6y - 13 - 5 = -y
y2 + 6y + y - 18 = 0
y2 + 7y - 18 = 0

Next, factor the quadratic equation:

y2 + 7y - 18 = 0
(y - 2)(y + 9) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (y - 2) or (y + 9) must equal zero:

If (y - 2) = 0, y must equal 2
If (y + 9) = 0, y must equal -9

So the solution is that y = 2 or -9

Word Knowledge
Celebrated most nearly means:
admired
Widely known, respected.
Math Knowledge

Which of the following is not true about both rectangles and squares?

the lengths of all sides are equal

A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).

Automotive Information

Power brakes multiply the force a driver applies to the brake pedal using a __________ connected to the engine intake manifold.

vacuum booster

Power brakes multiply the force a driver applies to the brake pedal using a vacuum booster connected to the engine intake manifold. This provides for much higher hydraulic pressure in the braking system than could be generated by the driver alone. Antilock brakes (ABS) use speed sensors and adjust the brake pressure at each wheel to prevent skidding and allow the driver more steering control in slippery conditions.