FREE NTN Mechanical Comprehension Questions and Answers
What is the purpose of a pulley system in mechanical operations?
Pulley systems are used to change the direction of a force applied and to reduce the effort required to lift heavy loads.
What type of motion does a cam convert?
A cam converts rotational motion into linear motion, which is often used in engines and other machinery to drive pistons or other components.
Which principle explains why a larger gear rotates slower than a smaller gear when they are meshed together?
The gear ratio determines the relationship between the rotational speeds of two meshed gears. A larger gear will rotate slower than a smaller gear due to this ratio.
In a hydraulic system, if the force applied on the smaller piston is increased, what happens to the pressure in the system?
According to Pascal's principle, the pressure in a confined fluid is transmitted equally in all directions. Increasing the force on the smaller piston increases the pressure in the hydraulic system.
Which law explains the mechanical advantage gained by using a lever?
The law of the lever explains how the lever provides a mechanical advantage, allowing a smaller force to lift a heavier load.