ASVAB Practice Test: Video 1 Answers (25 Questions) — Questions and Answers

Question 1: Which of the following numbers is divisible by 3?\t

49,763,296
18,067,871
85,019,457 (Correct answer)
32,832,988

Correct answer: 85,019,457

A number is divisible by 3 if the sum of its digits is divisible by 3. For 85,019,457, the sum of its digits is 8+5+0+1+9+4+5+7 = 39. Since 39 is divisible by 3 (39 ÷ 3 = 13), the original number 85,019,457 is also divisible by 3.

Question 2: What should come next in the following sequence? 64a, 55b, 46c, 37d, 28e, ?

6 years 8 months
7 years 2 months
8 years 7 months
5 years 4 months (Correct answer)

Correct answer: 5 years 4 months

The pattern is descending increments of 9 followed by the first letter, second letter, third letter, and so on.\r\n

Question 3: If y + 3y + 5y = −18, then what is the value of y?

1
0
−1
−2 (Correct answer)

Correct answer: −2

First, combine the like terms on the left side of the equation: y + 3y + 5y simplifies to 9y. The equation then becomes 9y = -18. To solve for y, divide both sides of the equation by 9. This gives y = -18 / 9, which results in y = -2.

Question 4: The sum of 7 numbers is greater than 140 and less than 210. Which of the following could be the average (arithmetic mean) of the numbers?

20
26 (Correct answer)
30
34

Correct answer: 26

The average (arithmetic mean) of a set of numbers is their sum divided by the count of numbers. Given that the sum of 7 numbers is greater than 140 and less than 210, the average must be between 140/7 and 210/7. This means the average must be greater than 20 and less than 30. Of the given options, only 26 falls within this range.

Question 5: If b does not equal zero, and ab = b/4, what is the value of a?

1/4 (Correct answer)
1/8
1/2
1/3

Correct answer: 1/4

To find the value of 'a', we need to isolate 'a' in the given equation `ab = b/4`. Since 'b' does not equal zero, we can divide both sides of the equation by 'b'. This simplifies the equation to `a = (b/4) / b`, which further reduces to `a = 1/4`.

Question 6: What is the genetic material found in the nucleus of a eukaryotic cell?

Protein
DNA (Correct answer)
Glucose
RNA

Correct answer: DNA

Deoxyribonucleic acid (DNA) is the hereditary material housed in the nucleus, encoding the genetic instructions for all cellular functions and traits.

Question 7: Which of the following are NOT decomposers?

vultures (Correct answer)
earthworms
fungi
bacteria

Correct answer: vultures

Decomposers are organisms that break down dead organic matter, recycling nutrients back into the ecosystem. Bacteria and fungi are primary decomposers, and earthworms are detritivores that contribute to decomposition. Vultures, however, are scavengers; they consume dead animals but do not break down organic matter at a molecular level like true decomposers.

Question 8: What type of rock forms from the cooling and solidification of magma or lava?

Limestone
Sedimentary
Metamorphic
Igneous (Correct answer)

Correct answer: Igneous

Igneous rocks form when molten rock (magma underground or lava at the surface) cools and solidifies; granite and basalt are common examples.

Question 9: Which of the following is an example of a chemical change rather than a physical change?

Melting ice
Dissolving sugar in water
Cutting paper
Burning wood (Correct answer)

Correct answer: Burning wood

Burning wood is a chemical change because new substances (ash, carbon dioxide, water vapor) are formed with different properties.

Question 10: Which of these planets is located farthest from the sun?

Neptune (Correct answer)
Uranus
Saturn
Jupiter

Correct answer: Neptune

The planets in our solar system, in order of increasing distance from the sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Among the given options, Neptune is the eighth and farthest known planet from the sun. Therefore, it is located farthest from the sun.

Question 11: At minimum, how many pulleys are there in a block and tackle system?

Four
Three
Two (Correct answer)
One

Correct answer: Two

A block and tackle system is a combination of pulleys and ropes used to lift heavy loads with less force. To achieve this mechanical advantage, the system requires at least two pulleys. Typically, one pulley is fixed to a support, and at least one other pulley is movable, attached to the load.

Question 12: A ratchet mechanism allows motion in one direction only. What component prevents reverse rotation?

Cam follower
Bearing
Worm gear
Detent pawl (Correct answer)

Correct answer: Detent pawl

The pawl engages the ratchet wheel's teeth to block rotation in the reverse direction.

Question 13: Which class of lever has the fulcrum located between the effort and the load?

Fourth class
Third class
Second class
First class (Correct answer)

Correct answer: First class

A first-class lever (like a seesaw or crowbar) has the fulcrum between effort and load.

Question 14: Which type of stress acts parallel to the cross-section of a material, causing layers to slide?

Bending stress
Shear stress (Correct answer)
Compressive stress
Tensile stress

Correct answer: Shear stress

Shear stress acts parallel to a surface, causing adjacent material layers to slide relative to each other.

Question 15: One horsepower is equivalent to

782 watts
724 watts
746 watts (Correct answer)
768 watts

Correct answer: 746 watts

Horsepower (hp) is a traditional unit of power, commonly used to rate engines and motors, while watts (W) are the standard unit of power in the International System of Units (SI). The conversion factor between these two units is a widely accepted standard. Specifically, one horsepower is precisely equivalent to 746 watts.

Question 16: Y2-49 = 0. Y could equal:

7 (Correct answer)
4
11
9

Correct answer: 7

The equation Y² - 49 = 0 can be solved by adding 49 to both sides, resulting in Y² = 49. To find Y, take the square root of both sides. The square root of 49 is 7, so Y could equal 7 (or -7, but 7 is the only positive option provided).

Question 17: If a square is cut in half across its diagonal, the formed triangles will have angles of:

45-45-45
30-60-90
45-45-90 (Correct answer)
60-60-60

Correct answer: 45-45-90

When a square is cut in half across its diagonal, it forms two congruent right-angled triangles. Since all angles in a square are 90 degrees and the diagonal bisects two of these angles, the two non-right angles in each triangle will be 45 degrees. Thus, the formed triangles are 45-45-90 right triangles.

Question 18: What is the area of an isosceles right triangle that has one leg that measures 4 cm?

16 cm
32 cm
8 cm (Correct answer)
4 √2 cm

Correct answer: 8 cm

An isosceles right triangle has two equal legs and a right angle. If one leg measures 4 cm, the other leg also measures 4 cm. The area of a right triangle is (1/2) * base * height. In this case, both the base and height are 4 cm, so the area is (1/2) * 4 cm * 4 cm = 8 cm².

Question 19: If a circle has a diameter of 1.5 feet, what is its circumference?

3.0 π
3.14 π
1.5 π (Correct answer)
0.75 π

Correct answer: 1.5 π

The circumference of a circle is calculated using the formula C = πd, where 'd' is the diameter. Given that the diameter is 1.5 feet, substitute this value into the formula. Therefore, the circumference is 1.5π feet.

Question 20: Calculate the area of a parallelogram with a base of 3 feet and a height of 1.2 feet.

3.6 square feet (Correct answer)
4.0 square feet
3.2 square feet
1.8 square feet

Correct answer: 3.6 square feet

The area of a parallelogram is calculated by multiplying its base by its height. Given a base of 3 feet and a height of 1.2 feet, the area is 3 feet * 1.2 feet. This calculation results in an area of 3.6 square feet.

Question 21: What is the unit of electrical capacitance?

Henry
Farad (Correct answer)
Ohm
Siemens

Correct answer: Farad

Capacitance is measured in farads (F), named after Michael Faraday.

Question 22: What is the function of a rectifier in a power supply?

Filters noise from signals
Regulates output voltage
Converts DC to AC
Converts AC to DC (Correct answer)

Correct answer: Converts AC to DC

A rectifier uses diodes to convert alternating current (AC) into direct current (DC).

Question 23: What is the function of an inductor in an AC circuit?

Blocks DC and passes AC
Amplifies voltage
Opposes changes in current (Correct answer)
Converts AC to DC

Correct answer: Opposes changes in current

An inductor opposes changes in current due to its self-induced back-EMF (inductive reactance).

Question 24: What is the color code for a resistor with bands: Red, Red, Brown, Gold?

220 ohms ±10%
2200 ohms ±5%
220 ohms ±5% (Correct answer)
22 ohms ±5%

Correct answer: 220 ohms ±5%

Red=2, Red=2, Brown=×10 multiplier, Gold=±5% tolerance gives 220 ohms ±5%.

Question 25: What is the relationship between inductive reactance and frequency?

Inversely proportional
Not related
Exponentially proportional
Directly proportional (Correct answer)

Correct answer: Directly proportional

Inductive reactance XL = 2πfL, so it increases proportionally as frequency increases.

ASVAB Practice Test: Video 1 Answers (25 Questions)

Which of the following numbers is divisible by 3?\t

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