Exam (elaborations)
Mechanical and aerospace engineering mcqs
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MULTIPLE CHOICE QUESTIONS BASED ON Mechanical and aerospace engineering
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Here Are 50 Quizzes / Multiple-Choice Questions (Mcqs) Related ToMECHANICAL ENGINEERING
With Correct Answers
**1. What is the primary purpose of a flywheel in an engine?**
a) To regulate fuel intake
b) To store and release energy
c) To control exhaust emissions
d) To increase combustion efficiency
**Answer: b) To store and release energy**
**2. Which law of thermodynamics states that energy cannot be created or
destroyed, only transferred or converted?**
a) First Law
b) Second Law
c) Third Law
d) Zeroth Law
**Answer: a) First Law**
**3. Which material property describes a material's resistance to deformation
under an applied load?**
a) Hardness
, b) Toughness
c) Elasticity
d) Strength
**Answer: d) Strength**
**4. What is the SI unit of pressure?**
a) Pascal
b) Newton
c) Joule
d) Watt
**Answer: a) Pascal**
**5. Which type of heat transfer does not require a medium for energy transfer?
**
a) Conduction
b) Convection
c) Radiation
d) Diffusion
**Answer: c) Radiation**
**6. The Carnot cycle consists of which four reversible processes?**
a) Isobaric, isothermal, adiabatic, isochoric
, b) Isothermal, isochoric, adiabatic, isobaric
c) Isochoric, isobaric, isothermal, adiabatic
d) Adiabatic, isobaric, isothermal, isochoric
**Answer: b) Isothermal, isochoric, adiabatic, isobaric**
**7. Which law of thermodynamics states that heat always flows from higher
temperature regions to lower temperature regions?**
a) Zeroth Law
b) First Law
c) Second Law
d) Third Law
**Answer: c) Second Law**
**8. Which type of gear system is used to transmit power between parallel
shafts?**
a) Spur gears
b) Bevel gears
c) Helical gears
d) Worm gears
**Answer: a) Spur gears**
**9. Which process involves the heating and cooling of a metal to modify its
properties without changing its shape?**
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