Mechanical Engineering
Mechanical Engineering covers core subjects like Thermodynamics, Strength of Materials, Theory of Machines, Fluid Mechanics, Heat Transfer, RAC, Manufacturing, and Design. Explore MCQs, notes, formulas, and exam-focused study material for competitive and university exams.
Q1. Which law states that stress is directly proportional to strain within elastic limit?
A. Newton’s law
B. Hooke’s law
C. Pascal’s law
D. Bernoulli’s law
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Q2. The efficiency of an ideal Carnot engine depends on?
A. Working fluid
B. Temperature difference
C. Pressure difference
D. Cycle speed
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Q3. Which material has highest melting point?
A. Aluminium
B. Iron
C. Tungsten
D. Copper
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Q4. The moment of inertia depends on?
A. Mass only
B. Shape only
C. Mass distribution
D. Material density
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Q5. Which cycle is used in petrol engines?
A. Otto cycle
B. Diesel cycle
C. Rankine cycle
D. Brayton cycle
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Q6. Entropy is a measure of?
A. Heat
B. Disorder
C. Temperature
D. Work
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Q8. Which fluid property enables flying of airplanes?
A. Buoyancy
B. Lift
C. Viscosity
D. Surface tension
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Q9. Which welding process uses a non-consumable electrode?
A. MIG
B. Arc welding
C. TIG welding
D. Gas welding
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Q10. The Reynolds number determines?
A. Flow type
B. Temperature
C. Pressure
D. Velocity only
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Q11. Creep failure occurs at?
A. Low temp
B. High temp
C. Zero temp
D. Room temp
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Q12. The property of material to absorb energy before fracture is?
A. Hardness
B. Elasticity
C. Toughness
D. Ductility
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Q13. Which gear is used for intersecting shafts?
A. Spur gear
B. Helical gear
C. Bevel gear
D. Worm gear
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Q14. Which mechanism converts rotary motion to linear motion?
A. Gear train
B. Cam and follower
C. Belt drive
D. Roller bearing
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Q15. Which law governs buoyant force?
A. Newton’s law
B. Archimedes’ principle
C. Boyle’s law
D. Pascal’s law
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Q16. Hardness test using diamond pyramid is called?
A. Brinell test
B. Rockwell test
C. Vickers test
D. Shore test
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Q17. Diesel engines work on which cycle?
A. Otto cycle
B. Carnot cycle
C. Diesel cycle
D. Ericsson cycle
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Q18. Which law explains lift force on aircraft wings?
A. Boyle’s law
B. Bernoulli’s law
C. Newton’s 3rd law
D. Pascal law
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Q19. Lathe machine primarily performs?
A. Milling
B. Drilling
C. Turning
D. Welding
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Q20. A flywheel controls?
A. Pressure
B. Temperature
C. Speed fluctuations
D. Fuel flow
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Q21. Which casting method uses sand?
A. Die casting
B. Permanent mold casting
C. Sand casting
D. Centifugal casting
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Q22. Supercharging increases?
A. Air supply
B. Fuel supply
C. Engine noise
D. Cooling rate
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Q23. Which turbine works on impulse principle?
A. Francis
B. Pelton
C. Kaplan
D. Propeller
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Q24. Which belt drive has highest power transmission?
A. Flat belt
B. V belt
C. Rope drive
D. Timing belt
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Q25. Heat transfer without any medium occurs by?
A. Conduction
B. Convection
C. Radiation
D. Insulation
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Q26. The ratio of output to input force in a machine is?
A. Velocity ratio
B. Efficiency
C. Mechanical advantage
D. Torque ratio
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Q27. Which machining process uses abrasive particles?
A. Turning
B. Grinding
C. Drilling
D. Boring
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Q28. Brake power is measured using?
A. Dynamometer
B. Tachometer
C. Voltmeter
D. Anemometer
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Q29. The neutral axis of a beam carries?
A. Max stress
B. Zero stress
C. Min shear stress
D. Max bending stress
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Q30. The term CNC stands for?
A. Computer Non Control
B. Computer Numerical Control
C. Central Numerical Coding
D. Control of Numbers
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