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Sample Practice Test Questions

Math Knowledge

Solve 3b + 2b = 9b - 9x + 8 for b in terms of x.

1\(\frac{5}{6}\)x - 1\(\frac{1}{3}\)

To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.

3b + 2x = 9b - 9x + 8
3b = 9b - 9x + 8 - 2x
3b - 9b = -9x + 8 - 2x
-6b = -11x + 8
b = \( \frac{-11x + 8}{-6} \)
b = \( \frac{-11x}{-6} \) + \( \frac{8}{-6} \)
b = 1\(\frac{5}{6}\)x - 1\(\frac{1}{3}\)

General Science

An electrically charged atom is a(n):

ion

A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.

Electronics Information

Which of the following is not a common type of battery?

power-cycle

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery. The three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).

Shop Information

Which of the following would be used to make a drilling guide mark in a sheet of metal?

center 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.

General Science

Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of:

1 m/s2 to a mass of 1 kg

Weight is a force that describes the attraction of gravity on an object. Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of 1 m/s2 to a mass of 1 kg.

Math Knowledge
12

If a = c = 4, b = d = 3, what is the area of this rectangle?

12

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 4 x 3
a = 12

Arithmetic Reasoning

If \( \left|x + 9\right| \) - 3 = 7, which of these is a possible value for x?

-19

First, solve for \( \left|x + 9\right| \):

\( \left|x + 9\right| \) - 3 = 7
\( \left|x + 9\right| \) = 7 + 3
\( \left|x + 9\right| \) = 10

The value inside the absolute value brackets can be either positive or negative so (x + 9) must equal + 10 or -10 for \( \left|x + 9\right| \) to equal 10:

x + 9 = 10
x = 10 - 9
x = 1
x + 9 = -10
x = -10 - 9
x = -19

So, x = -19 or x = 1.

Electronics Information

The valence shell of n insulator is how full of electrons?

more than half full

Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.

Word Knowledge
Rashid made the untenable statement that George Washington was the second president of the United States.
baseless
Not able to be defended.
Mechanical Comprehension

Coplanar forces:

act in a common plane

Collinear forces act along the same line of action, concurrent forces pass through a common point and coplanar forces act in a common plane.