FCTC FREE FCTC Test Mechanical Reasoning Principles Questions and Answers 4

Question 1

A fixed pulley changes the direction of force but not its magnitude. A movable pulley system with one movable pulley provides what mechanical advantage?

Accepted Answer

2

Answer

A single movable pulley has a mechanical advantage of 2 because two rope segments support the load.

Question 2

A beam is supported at both ends and loaded in the middle. Where does the maximum bending stress occur?

Accepted Answer

At the exact center of the beam

Answer

For a simply supported beam with a center load, the maximum bending moment—and thus maximum stress—occurs at the midpoint.

Question 3

If a car engine produces 200 ft-lbs of torque and the transmission multiplies it by a gear ratio of 3:1, what torque reaches the drive shaft?

Accepted Answer

600 ft-lbs

Answer

Output torque = Input torque × gear ratio = 200 × 3 = 600 ft-lbs.

Question 4

Two objects of equal mass are dropped simultaneously—one in a vacuum and one in air. Which hits the ground first?

Accepted Answer

The one in the vacuum

Answer

Air resistance slows the object dropped in air; in a vacuum, only gravity acts, so it falls faster.

Question 5

A ramp (inclined plane) is 10 feet long and rises 2 feet. What is the mechanical advantage of this ramp?

Accepted Answer

5

Answer

MA of an inclined plane = Length ÷ Height = 10 ÷ 2 = 5.

FCTC Test Practice Test

FCTC Test Practice Test

FCTC FREE FCTC Test Mechanical Reasoning Principles Questions and Answers 4