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MAE 1351 EXAM 3 Questions and Answers | Latest Update | 2024/2025 | Rated A+

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MAE 1351 EXAM 3 Questions and Answers | Latest Update | 2024/2025 | Rated A+ What is the primary function of a gear in a mechanical system? A gear transmits torque and alters the speed and direction of motion within a mechanical system, allowing for the efficient transfer of energy between...

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MAE 1351 EXAM 3 Questions and
Answers | Latest Update | 2024/2025 |
Rated A+
What is the primary function of a gear in a mechanical system?

✔✔A gear transmits torque and alters the speed and direction of motion within a mechanical

system, allowing for the efficient transfer of energy between components.

How does Pascal's principle apply to hydraulic systems?

✔✔Pascal's principle states that pressure applied to a confined fluid is transmitted equally in all

directions, enabling hydraulic systems to amplify force and control movement effectively.

What are the factors that influence the efficiency of a heat engine?

✔✔The efficiency of a heat engine is influenced by the temperature difference between the heat

source and sink, the type of working fluid used, and the design of the engine components.

How does a mechanical advantage affect the design of levers?

✔✔Mechanical advantage allows levers to lift heavier loads with less effort, determined by the

ratio of the distances from the fulcrum to the input and output forces.

1

,What role does the moment of inertia play in rotational dynamics?

✔✔The moment of inertia quantifies an object's resistance to changes in its rotational motion,

affecting how much torque is needed to achieve desired angular acceleration.

How do thermal expansions impact mechanical components?

✔✔Thermal expansion can cause components to expand or contract with temperature changes,

which engineers must account for to prevent mechanical failure or misalignment in assemblies.

What is the significance of Reynolds number in fluid mechanics?

✔✔The Reynolds number helps predict flow patterns in fluid dynamics, indicating whether flow

is laminar or turbulent, which is crucial for designing efficient fluid systems.

How does friction influence the performance of mechanical systems?

✔✔Friction generates resistance that can cause energy loss as heat; understanding its effects is

essential for designing systems that require minimal energy consumption and wear.

What is the difference between static and dynamic equilibrium in mechanical systems?

2

, ✔✔Static equilibrium occurs when all forces acting on an object are balanced and it remains at

rest, while dynamic equilibrium refers to an object moving at a constant velocity with balanced

forces.

How can stress concentration affect the integrity of a structural component?

✔✔Stress concentrations occur at points of discontinuity or geometric changes, leading to

localized increases in stress that can compromise the component's structural integrity and lead to

failure.

What are the benefits of using CAD software in mechanical design?

✔✔CAD software enhances design accuracy, facilitates rapid prototyping, allows for complex

simulations, and improves collaboration among engineering teams throughout the design

process.

How does the principle of conservation of momentum apply to collisions?

✔✔The principle of conservation of momentum states that in a closed system, the total

momentum before and after a collision remains constant, providing a basis for analyzing

impacts.

What is the purpose of a shock absorber in a vehicle?

3

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