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MMET 206 Exam #1 Questions and Answers | Latest Version | 2024/2025 | 100% Pass

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MMET 206 Exam #1 Questions and Answers | Latest Version | 2024/2025 | 100% Pass What is the principle of conservation of energy in mechanical systems? The principle of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to anot...

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  • October 29, 2024
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  • 2024/2025
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  • MMET 206
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MMET 206 Exam #1 Questions and
Answers | Latest Version | 2024/2025 |
100% Pass

What is the principle of conservation of energy in mechanical systems?


✔✔The principle of conservation of energy states that energy cannot be created or destroyed; it

can only be transformed from one form to another within a mechanical system.




How do you determine the center of gravity for an irregularly shaped object?


✔✔The center of gravity for an irregularly shaped object can be determined by balancing the

object on a point or using integration methods to calculate its centroid.




What is the difference between static and dynamic equilibrium?


✔✔Static equilibrium refers to a state where an object is at rest with no net forces acting upon it,

while dynamic equilibrium occurs when an object is moving at a constant velocity with balanced

forces.




What factors influence the choice of a lubricant in a mechanical system?


✔✔Factors include the operating temperature, load conditions, the type of motion involved, and

compatibility with the materials in contact.

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,Define shear stress and its significance in material science.


✔✔Shear stress is the force per unit area acting parallel to the surface of a material, significant

for understanding how materials will deform under lateral forces.




What are the three main types of heat transfer?


✔✔The three main types of heat transfer are conduction, convection, and radiation, each playing

a role in thermal management within mechanical systems.




Explain how a gear train functions in a mechanical assembly.


✔✔A gear train transfers motion and torque between shafts, allowing for speed reduction or

increase depending on the gear ratios involved.




What is the role of a torque wrench in mechanical applications?


✔✔A torque wrench measures and applies a specific torque to fasteners, ensuring they are

tightened to the correct specification without damage.




How does vibration analysis contribute to equipment maintenance?




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,✔✔Vibration analysis helps identify imbalances, misalignments, and wear in machinery,

allowing for proactive maintenance and reduced downtime.




What is the significance of dimensional analysis in engineering?


✔✔Dimensional analysis is used to check the consistency of equations, derive relationships

between physical quantities, and simplify complex problems by reducing them to their

fundamental dimensions.




What is a kinematic diagram, and how is it useful in mechanical design?


✔✔A kinematic diagram visually represents the motion of parts in a mechanism, aiding

engineers in understanding motion paths and interactions during design.




Describe the importance of conducting a load analysis in structural engineering.


✔✔Load analysis determines the forces acting on a structure, ensuring it can withstand

operational and environmental loads safely and effectively.




What is the difference between a hard and a soft material in engineering applications?


✔✔Hard materials resist deformation and wear, while soft materials are more ductile and

flexible, impacting their suitability for different applications and environments.


3

, Explain the concept of resonance and its potential impact on mechanical systems.


✔✔Resonance occurs when a system is driven at its natural frequency, potentially leading to

excessive vibrations and structural failure if not properly managed.




How can computer-aided design (CAD) improve the engineering design process?


✔✔CAD enhances the design process by providing precise modeling, facilitating modifications,

and allowing for virtual simulations, which improve accuracy and efficiency.




What is the significance of the mechanical advantage in machines?


✔✔Mechanical advantage measures how much a machine multiplies force, allowing users to lift

heavier loads with less input force.




Define tensile strength and its importance in material selection.


✔✔Tensile strength is the maximum amount of tensile (pulling) stress a material can withstand

before failure, critical for selecting materials in structural applications.




What is the role of a CAD system in mechanical engineering design?




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