FCTC FREE FCTC Test Mechanical Reasoning Principles Questions and Answers 5

Question 1

A 200-lb barrel is rolled up a 15-foot ramp to a platform 5 feet high. Ignoring friction, what is the force required?

Accepted Answer

67 lbs

Answer

Force = Weight × (Height ÷ Ramp length) = 200 × (5 ÷ 15) ≈ 67 lbs.

Question 2

Which factor does NOT affect the period (time for one oscillation) of a simple pendulum?

Accepted Answer

Mass of the bob

Answer

The period of a simple pendulum depends only on its length and gravity (T = 2π√(L/g)); mass has no effect.

Question 3

A flat belt drive connects two pulleys. The driving pulley has a 6-inch radius and turns at 300 RPM. The driven pulley has a 2-inch radius. What is its speed?

Accepted Answer

900 RPM

Answer

Belt speed is constant: driving speed × radius = driven speed × radius; 300 × 6 = N × 2, so N = 900 RPM.

Question 4

A nail is driven into wood using a hammer. The hammer head exerts a large force over a very short time. This is an example of what mechanical concept?

Accepted Answer

Impulse-momentum

Answer

Impulse (force × time) equals the change in momentum; a large, brief force delivers high impulse to drive the nail.

Question 5

In a series circuit with a 12V battery and three 4-ohm resistors, what is the total current?

Accepted Answer

1 A

Answer

Total resistance = 4 + 4 + 4 = 12 ohms; Current = Voltage ÷ Resistance = 12 ÷ 12 = 1 A.

FCTC Test Practice Test

FCTC Test Practice Test

FCTC FREE FCTC Test Mechanical Reasoning Principles Questions and Answers 5