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BT-203 Basic Mechanical Engineering Notes

5 notes for Basic Mechanical Engineering, unit by unit.

Unit 1 · Short notes Unit I: Materials Classification of engineering material · Composition of cast iron and carbon steels and the iron‑carbon diagram · Alloy steels and their applications · Mechanical properties: strength, hardness, toughness, ductility, brittleness, malleability · Tensile test – stress‑strain diagram of ductile and brittle materials · Hooke’s law and modulus of elasticity
Unit 2 · Short notes Unit II: Measurement Concept of measurements and measurement errors · Temperature, pressure, velocity, flow and strain measurement · Force and torque measurement · Vernier caliper, micrometer, dial gauge, slip gauge, sine‑bar and combination set
Unit 3 · Short notes Unit III: Production Engineering Elementary theoretical aspects of production processes such as casting, carpentry and welding · Introduction to lathe and drilling machines and their various operations
Unit 4 · Short notes Unit IV: Fluids Fluid properties – pressure, density and viscosity; classification of fluids · Newton’s law of viscosity and Pascal’s law · Bernoulli’s equation for incompressible fluids · Working principle of hydraulic machines, pumps, turbines and reciprocating pumps
Unit 5 · Short notes Unit V: Thermodynamics and Reciprocating Machines Thermodynamic system, properties, state and process; Zeroth, First and Second laws of thermodynamics · Thermodynamic processes at constant pressure, volume, enthalpy and entropy · Steam engineering – classification and working of boilers, mountings, efficiency, performance analysis, natural and artificial draught, steam properties and steam tables · Reciprocating machines – working principle of steam engine, Carnot, Otto, Diesel and Dual cycles with P‑V and T‑S diagrams and efficiencies · Two‑stroke and four‑stroke petrol and diesel engines, compressor operation

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