We generally get confused in three terms that are HOLE,GROOVE and SLOT.These terms might look similar but there are basic differences that make them different from each other.Again,it is an important interview question.
HOLE :-
1.)A hole may be defined as the circular cutout through the material.
2.)The hole may be upto a certain depth or throughout the material.
3.)In the figure below, (a) is throughout hole and (b)is upto a certain depth.
GROOVE :-
1.)A groove is a long and narrow indentation built into a material, generally for the purpose of allowing another material or part to move within the groove and be guided by it.
2.)Example includes a depression on the entire circumference of a cast or machined wheel, a pulley or sheave. This depression may receive a cable, a rope or a belt.
SLOT :-
1.) A narrow, elongated depression for receiving or admitting something like coin or a letter.
2.)A slot is cut into a flat plate or normal to the axis of a cylinder.
3.)You can simply understand that a slot can be through or blind but a groove is always blind(having some depth).
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