ASVAB MECHANICAL COMPREHENSION TEST

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ASVAB MECHANICAL COMPREHENSION TEST

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -17 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: What is a vector quantity?

• Gravity
• Magnitude
• Volume
• Mass

Answer:

The correct answer is (A) Gravity. Gravity is a type of force, and since force has magnitude and direction it is known as a vector quantity.Question 2: If a man uses 200 N of force over a distance of 50 meters, how many joules of work are performed?

A. 1,000

B. 5,000

C. 10,000

D. 20,000

Answer:

The correct answer is (C) 10,000.Work is defined as the product of force in the direction of displacement. Here a force of 200 N is used

over a displacement of 50 m. Consequently, the work performed is 200 N * 50 m = 10,000 J.Question 3: If Gear A turns counterclockwise, what other gears turn counterclockwise?See Picture

• C and D
• B and D
• C and B
• B, C, and D

Answer:

Question 15 Explanation:

The correct answer is (A) C and D.If A turns counterclockwise, it will cause B to turn clockwise. B will cause C and D to turn counterclockwise.

Question 4: One horsepower is equivalent to

• 724 watts
• 746 watts
• 768 watts
• 782 watts

Answer:

The correct answer is (B) 782 watts. Horsepower is a unit used to rate internal combustion engines.One horsepower is the equivalent of 746 watts.Question 5: An 80-lb child is sitting on one end of a seesaw. If another 80-lb child jumps from a high platform onto the other end of the seesaw, what will happen?

• The first child will stay stationary on the ground.
• The second child will bounce off the seesaw into the air.
• The first child will bounce off the seesaw into the air.
• The first child will be lifted into the air, but remain seated.

Answer:

The correct answer is (D) The first child will be lifted into the air, but remain seated.The force of the second child landing on the seesaw will propel the other end of the seesaw into the air.

Question 6: What is a component of potential energy?

• Upward reactive force
• The energy of movement
• Gravity's relationship to mass
• Newtons and distance

Answer:

The correct answer is (C) Gravity's relationship to mass.An object's potential energy is equal to its mass times its acceleration due to gravity times its height, or PE = mgh.Question 7: Which of the following describes the relationship between kinetic energy, mass, and velocity?

• KE = ½ m2v
• (1/3)(KE) = m/v2
• 2(KE) = mv2
• 3(KE) = m2v

Answer:

The correct answer is (C) 2(KE) = mv2.An object's kinetic energy is defined as KE = ½(mv2). Reorienting, we find: 2KE = mv2.Question 8: A fish tank at an aquarium contains several cubic feet of water (1 cubic foot of water = 62.5 pounds). If the fish tank is 6 feet deep, 12 feet wide, and 13 feet long, what's the approximate pressure at the bottom of the tank in pounds per square inch?

A. 2.0

B. 2.5

C. 3.0

D. 3.5

Answer:

The correct answer is (B) 2.5.To find the pressure (psi), we must divide the tank's total volume by the surface area of the bottom of the tank. The volume = 6 x 12 x 13 = 936 feet. Multiply it by 62.5 to convert it into pounds: 936 x 62.5 =

58,500.

The bottom of the tank's surface area is 12 ft x 13 ft = 144 inches x 156 inches. Since pressure is in pounds per square inch (psi), we have to convert to inches. The surface area is 22,464 inches.The psi is 58,500 / 22,464 is approximately 2.6. The closest answer is (B).Question 9: What simple machine magnifies effort when the handle of this corkscrew is pulled up?See Picture

• a lever.
• a screw.
• a wheel.
• a wedge

Answer:

• a wedge

Question 10: At minimum, how many pulleys are there in a block and tackle system?

• one
• two
• three
• four

Answer:

The correct answer is (B) two.The block and tackle pulley system requires at least two or more pulleys. The bare minimum for this system is two.