ASVAB Practice Test: Video 2 Answers (25 Questions) — Questions and Answers

Question 1: How much greater is the value of 3x + 5 than the value of 3x − 7?

8
10
12 (Correct answer)
14

Correct answer: 12

To find how much greater one expression is than another, subtract the second expression from the first: (3x + 5) - (3x - 7). Distributing the negative sign gives 3x + 5 - 3x + 7. The '3x' terms cancel out, leaving 5 + 7, which simplifies to 12. Thus, 3x + 5 is 12 greater than 3x - 7.

Question 2: The hour hand of a watch rotates 30 degrees every hour. How many complete rotations does the hour hand make in 6 days?

8
10
14
12 (Correct answer)

Correct answer: 12

The hour hand completes one full 360-degree rotation every 12 hours. In 6 days, there are 6 * 24 = 144 hours in total. To find the number of complete rotations, divide the total hours by the hours it takes for one rotation: 144 hours / 12 hours/rotation = 12 rotations. So, the hour hand makes 12 complete rotations in 6 days.

Question 3: How many 1/3 pound paperback books together weigh 25 pounds?

50
35
75 (Correct answer)
60

Correct answer: 75

To find out how many books are needed, divide the total desired weight by the weight of a single book. The total weight is 25 pounds, and each book weighs 1/3 pound. Dividing 25 by 1/3 is equivalent to multiplying 25 by the reciprocal of 1/3, which is 3. Therefore, 25 * 3 = 75 books.

Question 4: Which of the following is equivalent to 2 times the total of x plus y?\t

2x(2y)
2xy
2x\/2y
2x + 2y (Correct answer)

Correct answer: 2x + 2y

The phrase 'the total of x plus y' translates to the expression (x + y). '2 times' means to multiply this sum by 2, resulting in 2(x + y). Applying the distributive property, this expression expands to 2x + 2y, meaning 2 is multiplied by both x and y individually.

Question 5: The absolute value of 5 plus a number equals 10. Which of the following options is the correct solution set for the above equation?\t

{-15, 5} (Correct answer)
{-5, 5}
{10, -10}
{-5, 15}

Correct answer: {-15, 5}

An absolute value equation |A| = B means that A can be B or A can be -B. So, for |5 + a number| = 10, we set up two equations: 5 + x = 10 and 5 + x = -10. Solving the first gives x = 5, and solving the second gives x = -15. Thus, the correct solution set is {-15, 5}.

Question 6: How many grams are in one kilogram?

10,000
1,000 (Correct answer)
100
10

Correct answer: 1,000

In the metric system, the prefix 'kilo-' denotes a factor of one thousand (10^3). Therefore, one kilogram (kg) is equivalent to 1,000 grams (g). This is a fundamental conversion used in scientific and everyday measurements.

Question 7: What is the atomic number of an element determined by?

Mass of the nucleus
Number of neutrons
Number of electrons only
Number of protons (Correct answer)

Correct answer: Number of protons

The atomic number equals the number of protons in an atom's nucleus and uniquely identifies the element on the periodic table.

Question 8: Which of the following time periods is the longest?

Era
Eon (Correct answer)
Age
Period

Correct answer: Eon

Geological time is divided into hierarchical units. An Eon is the largest division of geological time, encompassing vast spans of hundreds of millions to billions of years. Eras, Periods, and Ages are progressively smaller subdivisions within an Eon, making the Eon the longest time period among the given options.

Question 9: Bile is produced by the

pancreas
liver (Correct answer)
kidneys
stomach

Correct answer: liver

Bile is a crucial digestive fluid that aids in the digestion and absorption of fats in the small intestine. It is produced by the liver, then stored and concentrated in the gallbladder before being released. The pancreas, stomach, and kidneys perform different functions in the digestive and excretory systems.

Question 10: Which blood type is considered the universal donor for red blood cell transfusions?

Type A
Type AB
Type B
Type O negative (Correct answer)

Correct answer: Type O negative

Type O negative blood lacks A, B, and Rh antigens, so it can be transfused to patients of any blood type without triggering an immune reaction.

Question 11: Two objects of different masses are dropped from the same height in a vacuum. Which hits the ground first?

Depends on their shape
They hit at the same time (Correct answer)
The lighter object
The heavier object

Correct answer: They hit at the same time

In a vacuum, gravity accelerates all objects equally regardless of mass, so both hit simultaneously.

Question 12: Which of the following is the basis for Pascal’s Law?

The relationship between force and volume of a liquid.
The manner in which liquids conform to their container.
The definition of pressure as pounds per square inch.
The amplification of force in a hydraulic system. (Correct answer)

Correct answer: The amplification of force in a hydraulic system.

Pascal's Law states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere. This principle is the fundamental basis for how hydraulic systems work, allowing a small force applied over a small area to generate a much larger force over a larger area, thus amplifying force.

Question 13: A belt connecting two pulleys slips when the tension difference between tight and slack sides is too great. What is the most effective fix?

Reduce load
Increase belt tension (Correct answer)
Use a shorter belt
Increase pulley diameter

Correct answer: Increase belt tension

Increasing belt tension raises friction force, allowing greater torque transfer without slipping.

Question 14: Which valve type is best suited for fully open or fully closed flow control, not for throttling?

Gate valve (Correct answer)
Butterfly valve
Globe valve
Needle valve

Correct answer: Gate valve

Gate valves are designed for on/off service and should not be used for throttling as the gate can vibrate and erode.

Question 15: A screw has 20 threads per inch. How far does it advance per complete revolution?

0.5 inches
0.05 inches (Correct answer)
20 inches
0.025 inches

Correct answer: 0.05 inches

Advance per revolution = 1 ÷ threads per inch = 1 ÷ 20 = 0.05 inches.

Question 16: Which of the following angles is obtuse?

90 degrees
45 degrees
15 degrees
130 degrees (Correct answer)

Correct answer: 130 degrees

An obtuse angle is defined as an angle that measures greater than 90 degrees but less than 180 degrees. Among the given options, 130 degrees is the only angle that falls within this range. The other options represent acute angles (less than 90 degrees) or a right angle (exactly 90 degrees).

Question 17: The base of a right triangle is 1 foot, and the interior angles are 45-45-90. What is its area?

2 feet squared
1 foot squared
0.5 foot squared (Correct answer)
4 feet squared

Correct answer: 0.5 foot squared

A right triangle with 45-45-90 interior angles is an isosceles right triangle, meaning its two legs are equal in length. If the base is 1 foot, then the height is also 1 foot. The area of a triangle is calculated as (1/2) * base * height, so the area is (1/2) * 1 foot * 1 foot = 0.5 square foot.

Question 18: If (3.2 + 3.3 + 3.5)w = w, then what is the value of w?

1\/10
1
0 (Correct answer)
10

Correct answer: 0

First, sum the numbers inside the parentheses: 3.2 + 3.3 + 3.5 = 10. The equation then becomes 10w = w. To solve for w, subtract w from both sides: 10w - w = 0, which simplifies to 9w = 0. Dividing both sides by 9 yields w = 0.

Question 19: If n is a positive integer divisible by 7, and if n < 70, what is the greatest possible value of n?

56
69
49
63 (Correct answer)

Correct answer: 63

We are looking for the largest positive integer 'n' that is a multiple of 7 and strictly less than 70. Listing the multiples of 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70. Since 'n' must be less than 70, the greatest possible value from this list is 63.

Question 20: Solve for the value of x in the following system: 2x + 4y = 15 3x - 4y = 10

9
3
5 (Correct answer)
10

Correct answer: 5

This system of equations can be solved using the elimination method. Notice that the 'y' terms have opposite coefficients (+4y and -4y). Adding the two equations together eliminates 'y': (2x + 4y) + (3x - 4y) = 15 + 10, which simplifies to 5x = 25. Dividing both sides by 5 gives x = 5.

Question 21: What type of circuit has only one path for current to flow?

Complex circuit
Bridge circuit
Series circuit (Correct answer)
Parallel circuit

Correct answer: Series circuit

In a series circuit, all components share the same single current path.

Question 22: What type of logic gate outputs HIGH only when all inputs are HIGH?

AND gate (Correct answer)
NOR gate
NAND gate
OR gate

Correct answer: AND gate

An AND gate produces a HIGH output only when every input is HIGH; otherwise, output is LOW.

Question 23: What does a diode primarily do in a circuit?

Measures voltage
Stores electrical energy
Allows current to flow in only one direction (Correct answer)
Amplifies current

Correct answer: Allows current to flow in only one direction

A diode is a semiconductor device that permits current to flow in one direction only.

Question 24: What is the purpose of a bypass capacitor placed near an IC power pin?

Increase supply voltage
Filter high-frequency noise on the power supply line (Correct answer)
Store energy for backup power
Block DC current from the IC

Correct answer: Filter high-frequency noise on the power supply line

A bypass (decoupling) capacitor filters high-frequency noise and voltage spikes from the power supply.

Question 25: What is the purpose of a voltage regulator IC in a circuit?

Filter high-frequency noise
Amplify weak signals
Maintain a stable output voltage despite input variations (Correct answer)
Convert AC to DC

Correct answer: Maintain a stable output voltage despite input variations

A voltage regulator IC keeps the output voltage constant regardless of load or input fluctuations.

ASVAB Practice Test: Video 2 Answers (25 Questions)

How much greater is the value of 3x + 5 than the value of 3x − 7?

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