FCTC FCTC Test Applying Mechanical Reasoning Questions and Answers 4

Question 1

A ramp is 10 feet long and 2 feet high. What is the mechanical advantage of using this inclined plane to push a load up it?

Accepted Answer

5

Answer

Mechanical advantage of an inclined plane = ramp length / height = 10 / 2 = 5.

Question 2

Two pistons in a hydraulic system: the input piston has a 1 in² area and the output piston has a 9 in² area. The input piston moves down 9 inches. How far does the output piston move up?

Accepted Answer

1 inch

Answer

Volume displaced is equal: 1 in² × 9 in = 9 in³ = 9 in² × x, so x = 1 inch.

Question 3

A solid metal cylinder and a hollow metal tube of the same material and outer diameter are both used as columns supporting a load. Which is stronger?

Accepted Answer

The solid cylinder

Answer

A solid cylinder has more cross-sectional area and is stronger in compression than a hollow tube of the same outer diameter.

Question 4

Which of the following best describes the function of a flywheel in an engine?

Accepted Answer

Stores rotational energy to smooth out power pulses

Answer

A flywheel stores kinetic energy during power strokes and releases it during non-power strokes to maintain steady rotation.

Question 5

A lever has its fulcrum 3 feet from a 90 lb load and 9 feet from the point where force is applied. What force is needed to lift the load?

Accepted Answer

30 lbs

Answer

Lever equilibrium: effort × effort arm = load × load arm → effort × 9 = 90 × 3, so effort = 30 lbs.

FCTC Test Practice Test

FCTC Test Practice Test

FCTC FCTC Test Applying Mechanical Reasoning Questions and Answers 4