A fluid is defined as a substance that

deforms continuously under any finite shear stress, however small

For a fluid at rest, the pressure at a point is

the same in all directions at that point

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Revision & Exam Traps· 6 formulae · 3 traps

Strength of Materials

Bending stress is max at the extreme fibre (max y), zero at the neutral axis. Don’t evaluate σ at the centroid.

Bending of Beams

Torsion of Shafts

Fluid Mechanics

Continuity Q=AV: as area falls velocity rises, and by Bernoulli higher velocity means LOWER pressure.

Thermodynamics

Carnot efficiency uses ABSOLUTE temperatures (K). Plugging in °C gives a nonsensical η.

Machine Design

GATE Mechanical Engineering Syllabus (2025)

4 subjects · 185 topics

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