MMET 181 - Exam 2 Questions and Answers | Latest Version | 2024/2025 | Rated A+
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Course
MMET 181 -
Institution
MMET 181 -
MMET 181 - Exam 2 Questions and
Answers | Latest Version | 2024/2025 |
Rated A+
What is the primary function of a lathe in manufacturing?
A lathe is primarily used for shaping materials by rotating the workpiece against cutting
tools, allowing for precise machining of cylindrical parts.
...
MMET 181 - Exam 2 Questions and
Answers | Latest Version | 2024/2025 |
Rated A+
What is the primary function of a lathe in manufacturing?
✔✔A lathe is primarily used for shaping materials by rotating the workpiece against cutting
tools, allowing for precise machining of cylindrical parts.
How does a gear's tooth profile affect its performance?
✔✔The tooth profile of a gear affects its load distribution, efficiency, and noise level during
operation, influencing overall gear performance.
Describe how "fixture" differs from a "jig" in manufacturing.
✔✔A fixture holds a workpiece in place during machining, while a jig guides the cutting tool,
enhancing accuracy and repeatability.
What are the advantages of using laser cutting technology?
✔✔Laser cutting offers high precision, minimal material waste, and the ability to cut complex
shapes in various materials with a clean edge.
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,Explain the principle of "geometric dimensioning and tolerancing" (GD&T).
✔✔GD&T is a system that uses symbols to define engineering tolerances, ensuring parts fit and
function correctly despite manufacturing variations.
What role do bearings play in mechanical systems?
✔✔Bearings reduce friction between moving parts, support loads, and enhance the efficiency
and longevity of mechanical systems.
What is the difference between AC and DC motors?
✔✔AC motors run on alternating current, offering simplicity and low maintenance, while DC
motors use direct current, providing better speed control and higher starting torque.
Define "stress concentration" and its implications in design.
✔✔Stress concentration refers to the localized increase in stress in a material, often occurring
around notches or holes, which can lead to failure if not accounted for in design.
How do you determine the correct cutting speed for machining operations?
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, ✔✔The cutting speed is determined by factors such as material type, tool geometry, and machine
capabilities, often calculated using established formulas or tables.
What is the importance of surface finish in manufactured parts?
✔✔Surface finish affects the aesthetic appearance, wear resistance, and performance of parts,
influencing factors such as friction and fatigue life.
Describe the process of anodizing and its benefits.
✔✔Anodizing is an electrochemical process that enhances the corrosion resistance and durability
of aluminum parts while allowing for improved paint adhesion.
How does the principle of conservation of energy apply to mechanical systems?
✔✔The principle of conservation of energy states that energy cannot be created or destroyed; it
can only change forms, impacting how mechanical systems are designed and analyzed.
What factors influence the choice of material for a specific application?
✔✔Factors include mechanical properties, thermal resistance, corrosion resistance, cost, and
availability, which help determine the best material for performance and durability.
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