Study: Mechanical Engineering Fundamentals

help Question 1

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What is the First Law of Thermodynamics?

A Energy cannot be created or destroyed, only transformed from one form to another

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B Heat flows from cold to hot bodies

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C Entropy of an isolated system always increases

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D Perfect crystals have zero entropy at absolute zero

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help Question 2

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What does stress measure in materials science?

A Total deformation of material

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B Force per unit area (σ = F/A)

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C Energy stored in material

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D Rate of deformation

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help Question 3

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What is the unit of torque?

A Newton (N)

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B Pascal (Pa)

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C Newton-meter (N⋅m)

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D Joule (J)

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help Question 4

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What principle explains how hydraulic systems work?

A Archimedes' Principle

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B Pascal's Principle - pressure applied to confined fluid is transmitted equally in all directions

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C Bernoulli's Principle

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D Newton's Third Law

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help Question 5

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What does Young's Modulus measure?

A Material's density

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B Material's resistance to elastic deformation (stiffness)

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C Material's thermal conductivity

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D Material's electrical resistance

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help Question 6

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What is the difference between heat and temperature?

A Heat and temperature are the same thing

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B Heat is energy transfer; temperature is a measure of molecular kinetic energy

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C Heat is cooler than temperature

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D Temperature is measured in Joules

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help Question 7

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What is the purpose of a gear system?

A To store mechanical energy

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B To change speed, torque, or direction of rotational motion

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C To convert electrical to mechanical energy

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D To measure rotational speed

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help Question 8

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What does the term "factor of safety" mean in engineering?

A Maximum load a structure can bear

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B Ratio of ultimate strength to working stress

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C Time until material failure

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D Cost of safety equipment

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help Question 9

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What is the principle behind a four-stroke engine?

A Intake, Compression, Power, Exhaust strokes

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B Fuel, Air, Spark, Motion

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C Start, Run, Idle, Stop

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D Heat, Work, Energy, Power

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help Question 10

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What is friction?

A Force that increases motion

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B Resistance to relative motion between two surfaces in contact

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C Energy stored in moving objects

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D Heat generated by motion

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quiz Mechanical Engineering Fundamentals

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