FREE NTN Mechanical Comprehension Questions and Answers
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.
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.
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.
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.
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.