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"Fundamentals of Mechanical Engineering: Diploma Study Guide 2024"

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Manufacturing Processes: A Comprehensive Overview This document provides an in-depth understanding of various manufacturing processes used in modern industry. It covers topics such as casting, machining, welding, forming, and additive manufacturing (3D printing). With a focus on process selectio...

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  • November 15, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
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What is casting? Explain the types of casting processes.

Answer:
Casting is a process where molten metal is poured into a mold and allowed to solidify.

Sand Casting: Uses sand molds, suitable for large components.

Die Casting: Molten metal is injected into a metal mold under pressure.

Investment Casting: Uses wax patterns; provides precise details.

Centrifugal Casting: Rotates molds to create hollow parts like pipes.




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2. Define welding and list common types.

Answer:
Welding is a process of joining two or more metal parts by heating or applying pressure.

Arc Welding: Uses an electric arc (e.g., MIG, TIG welding).

Gas Welding: Uses a flame (oxy-acetylene).

Resistance Welding: Uses electrical resistance (spot welding).

Laser Welding: Uses laser beams for precision.




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3. What is forging? Explain the difference between hot and cold forging.

Answer:
Forging involves shaping metal using compressive forces.

Hot Forging: Done above recrystallization temperature (easier to deform).

Cold Forging: Done at room temperature (provides better surface finish and strength).

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