Theory of Machines: Machine Design and Applications

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What is 'machine design'?
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Machine design involves creating mechanical components and systems that are efficient, reliable, and fit for purpose.
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What considerations are important in the material selection for machine components?
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Material selection depends on strength, toughness, corrosion resistance, weight, and thermal stability.
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What is the role of tolerances in machine design?
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Tolerances specify allowable variations in dimensions to ensure parts fit and function correctly.
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Define 'factor of safety' in machine design.
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Factor of safety is a design criterion ensuring components withstand loads beyond expected conditions.
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How does ergonomics influence machine design?
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Ergonomics influences machine design by enhancing user interaction, safety, and comfort.
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Why is load analysis essential in machine design?
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Load analysis ensures that components can sustain expected forces and stresses during operation.
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What is the significance of CAD in machine design?
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CAD (Computer-Aided Design) allows for precise modeling, simulation, and optimization of components.
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What is fatigue in the context of machine components?
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Fatigue refers to the weakening or failure of material due to repeated stress cycles.
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Explain the purpose of lubrication in machines.
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Lubrication reduces friction and wear between moving parts, extending machine life.
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What are the common types of machine joints?
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Common machine joints include welded, bolted, and riveted joints.
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When is a gear train used in machine design?
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Gear trains are used to transfer motion and power between machine components with modified torque and speed.
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Explain the concept of 'creep' in materials.
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Creep is the gradual deformation of materials under constant stress over time.
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What is the importance of thermal analysis in machine design?
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Thermal analysis predicts how temperature changes affect machine performance and material properties.
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What are the design considerations for creating a durable machine?
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Considerations include selecting appropriate materials, ensuring proper stress distribution, and accounting for wear and tear.
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What is the purpose of a stress-strain diagram in design applications?
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A stress-strain diagram helps visualize material behavior under stress, informing design choices.
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