NAVY ASVAB: MECHANICAL COMPREHENSION EXAM

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NAVY ASVAB: MECHANICAL COMPREHENSION EXAM

QUESTIONS

Qs and Ans - Expert- Explanation - ing score -20 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Pressure Equation

Answer:

force/area

Question 2: Effort Equation

Answer:

weight/mechanical advantage

Question 3: Class Three Lever

Answer:

Fulcrum is at one end, the load is at the other and the effort is between the fulcrum and the load

Question 4: Mechanical Advantage Equation on a Lever

Answer:

load/effort or effort distance/loas distance

Question 5: What happens when a mass of air expands?

Answer:

The air cools down

Question 6: Class Two Lever

Answer:

Fulcrum is at one end, effort is at the other end and the load is between the fulcrum and the effort

Question 7: Class One Lever

Answer:

Fulcrum is between the effort and the load

Question 8: Why are triangles used in constructing bridges?

Answer:

Because they are sturdier than other shapes because you would have to break the legs or angles

Question 9: Water Pressure Equation (lb/ft^2)

Answer:

• Find area of the unit

• Total weight/area of bottom

Question 10: Class Two Lever Example

Answer:

Wheel Barrow

Question 11: Pressure is the same at all points in a...

Answer:

closed system Question 12: In a pulley system, what is the easiest way to find the theoretical mechanical advantage?

Answer:

Count the supporting strands-the ones that are shortened as you hoist

Question 13: Examples of a class three lever

Answer:

Tweezers and tongs

Question 14: Fluid pressure falls when...

Answer:

velocity increases

Question 15: Lift is created on an airplane wing because...

Answer:

Air pressure above the wing is less than the air pressure below the wing

Question 16: Scissor combine which simple machines and why?

Answer:

Lever and inclined plane: the handles pivot around a pin at the center-lever. The blades that shear the object are just inclined planes

Question 17: The more pulleys you have the (blank) the mechanical advantage

Answer:

higher

Question 18: Class One Lever Example

Answer:

Scissors

Question 19: Moving a fulcrum closer to a load will...

Answer:

Increase the mechanical advantage

Question 20: What does water pressure at the bottom of a tank depend on?

Answer:

Depth of the water