NTS GAT Subject (Mechanical Engineering) FLP 3 Free Quiz

1. What are engineering materials?

A. Metals, polymers, ceramics, composites B. Metals only C. Polymers only D. Ceramics only

2. What are the characteristics of metals?

A. Polymers B. Ceramics C. Metals D. Composites

3. What are the characteristics of polymers?

A. Metals B. Ceramics C. Composites D. Polymers

4. What materials combine two or more materials to achieve superior properties?

A. Composites B. Metals C. Ceramics D. Polymers

5. What is copper known for?

A. Copper B. Aluminum C. Steel D. Titanium

6. What is bronze?

A. Copper and zinc B. Copper and aluminum C. Copper and nickel D. Copper and tin

7. What is titanium known for?

A. Steel B. Titanium C. Aluminum D. Magnesium

8. What type of polymer softens when heated?

A. Thermosets B. Elastomers C. Ceramics D. Thermoplastics

9. What type of polymer can stretch and return to shape?

A. Elastomers B. Thermoplastics C. Thermosets D. Ceramics

10. What is a non-ferrous material?

A. Steel B. Non-ferrous C. Cast iron D. Wrought iron

11. When does creep occur?

A. Fatigue B. Impact C. Static loading D. Creep

12. What is engineering mechanics?

A. Forces and their effects B. Statics only C. Dynamics only D. Kinematics only

13. What branch of mechanics deals with bodies at rest?

A. Dynamics B. Kinematics C. Statics D. Kinetics

14. What branch of mechanics deals with bodies in motion?

A. Statics B. Kinematics C. Kinetics D. Dynamics

15. What is Newton's First Law?

A. F = ma B. Action-reaction C. Law of inertia D. Body at rest stays at rest

16. What is the centroid?

A. Centroid B. Center of gravity C. Center of mass D. Center of pressure

17. What is a couple?

A. A single force B. Two perpendicular forces C. Two unequal forces D. Two equal and opposite parallel forces

18. What type of friction acts when there is no relative motion?

A. Static friction B. Kinetic friction C. Rolling friction D. Fluid friction

19. What type of friction acts during relative motion?

A. Static B. Rolling C. Kinetic D. Fluid

20. What is a truss?

A. Frame B. Truss C. Beam D. Column

21. What is work?

A. W = F × d B. W = F × t C. W = F × v D. W = F × a

22. What is power?

A. P = F × v B. P = F × d C. P = W/t D. P = m × a

23. What does the conservation of energy state?

A. Mass conservation B. Momentum conservation C. Energy conservation D. Force conservation

24. What is viscosity?

A. Density B. Specific weight C. Specific gravity D. Viscosity

25. What is Newton's law of viscosity?

A. τ = μu B. τ = μ(du/dy) C. τ = μ/y D. τ = μu/y

26. What is the continuity equation for incompressible flow?

A. P1V1 = P2V2 B. V1 = V2 C. A1V1 = A2V2 D. A1 = A2

27. What is Bernoulli's equation?

A. P + V²/2 + gz = constant B. P/ρ + V²/2 = constant C. P/ρ + gz = constant D. P/ρ + V²/2 + gz = constant

28. What dimensionless number predicts flow regime?

A. Froude number B. Reynolds number C. Mach number D. Euler number

29. What does a Pitot tube measure?

A. Flow rate B. Pressure C. Velocity D. Density

30. What principle does a hydraulic lift work on?

A. Bernoulli B. Pascal C. Archimedes D. Newton

31. What is determined from the Moody chart?

A. Reynolds number B. Roughness C. Diameter D. Friction factor

32. What device extracts energy from a fluid?

A. Turbine B. Pump C. Compressor D. Blower

33. What is specific gravity?

A. Density B. Specific weight C. Specific gravity D. Relative density

34. What is capillary action caused by?

A. Cohesion B. Capillary action C. Viscosity D. Density

35. In which flow regime do shock waves occur?

A. Subsonic B. Transonic C. Hypersonic D. Supersonic

36. What is heat transfer?

A. Movement of thermal energy B. Conduction only C. Convection only D. Radiation only

37. What is Fourier's Law?

A. q = h(Ts - T∞) B. q = εσT⁴ C. q = -kA dT/dx D. q = -k dT/dx

38. What is convection?

A. Convection B. Conduction C. Radiation D. Diffusion

39. What is radiation?

A. Conduction B. Radiation C. Convection D. Advection

40. What type of convection is driven by buoyancy?

A. Forced convection B. Conduction C. Natural convection D. Radiation

41. What type of convection is driven by external means?

A. Natural B. Free C. Buoyant D. Forced

42. What is used to dissipate heat from electronic components?

A. Heat sink B. Heat pipe C. Fin D. Radiator

43. What cycle is used in spark-ignition engines?

A. Diesel B. Rankine C. Brayton D. Otto

44. What causes knocking in an ICE?

A. Normal combustion B. Pre-ignition C. Late ignition D. Premature ignition

45. What does the cetane number indicate?

A. Cetane number B. Octane number C. Flash point D. Fire point

46. What is mechanically driven to increase intake air pressure?

A. Turbocharger B. Fuel injector C. Compressor D. Supercharger

47. What cycle does a steam power plant operate on?

A. Otto B. Rankine C. Diesel D. Brayton

48. What cycle does a gas turbine power plant operate on?

A. Brayton B. Rankine C. Otto D. Diesel

49. What condenses steam into water?

A. Boiler B. Turbine C. Pump D. Condenser

50. What fuel is burned in a coal-fired power plant?

A. Coal B. Gas C. Oil D. Nuclear

51. What is the thermal efficiency of a power plant?

A. Work/Heat B. Heat/Work C. Power/Heat D. Net work output / Heat input

52. What is manufacturing?

A. Converting raw materials into finished products B. Machining only C. Casting only D. Forming only

53. What is extrusion?

A. Extrusion B. Forging C. Rolling D. Casting

54. What is machining?

A. Forming B. Casting C. Machining D. Joining

55. What machining process uses a lathe?

A. Milling B. Drilling C. Grinding D. Turning

56. What machining process produces holes?

A. Drilling B. Milling C. Turning D. Grinding

57. What machining process uses an abrasive wheel?

A. Turning B. Milling C. Grinding D. Drilling

58. What joining process fuses materials using heat?

A. Brazing B. Soldering C. Adhesive bonding D. Welding

59. What heat treatment process hardens metal by rapid cooling?

A. Annealing B. Quenching C. Tempering D. Normalizing

60. What process hardens the surface of a metal?

A. Full hardening B. Through hardening C. Case hardening D. Tempering

61. What is CNC machining?

A. Computer-controlled B. Manual C. Hydraulic D. Pneumatic

62. When does resonance occur?

A. Equals natural frequency B. Below natural frequency C. Above natural frequency D. Double natural frequency

63. What is the natural frequency of a spring-mass system?

A. ωn = √(m/k) B. ωn = k/m C. ωn = √(k/m) D. ωn = m/k

64. What type of control system does not use feedback?

A. Open-loop B. Closed-loop C. Feedforward D. Adaptive

65. What does the proportional controller do?

A. Integral B. Derivative C. Both D. Proportional

66. Which controller eliminates steady-state error?

A. Proportional B. Integral C. Derivative D. None

67. What does the derivative controller do?

A. Derivative B. Proportional C. Integral D. None

68. What is a Nyquist plot?

A. Bode B. Root locus C. Nyquist D. Nichols

69. What are gain margin and phase margin?

A. Steady-state measures B. Transient measures C. Error measures D. Stability margin measures

70. What transform is used for frequency analysis?

A. Laplace B. Z-transform C. Fourier D. Hilbert

71. What does mechanics of materials deal with?

A. Stress, strain, and deformation of solids B. Stress only C. Strain only D. Deformation only

72. What is Hooke's Law?

A. σ = Eε B. σ = Gγ C. σ = νε D. σ = E/ε

73. What is shear stress?

A. Normal stress B. Bending stress C. Shear stress D. Torsional stress

74. What causes bending stress in a beam?

A. Shear B. Torsion C. Axial D. Bending

75. What is the torsion formula?

A. τ = Tr/J B. τ = VQ/It C. σ = My/I D. σ = P/A

76. What is used in torsion calculations?

A. Area moment of inertia B. Section modulus C. Polar moment of inertia D. Radius of gyration

77. What is the yield strength?

A. Yield strength B. Ultimate strength C. Fracture strength D. Fatigue strength

78. What is brittleness?

A. Ductility B. Toughness C. Hardness D. Brittleness

79. What is toughness?

A. Hardness B. Toughness C. Ductility D. Brittleness

80. Where does stress concentration occur?

A. Uniform stress B. Smooth surface C. Geometric discontinuities D. Reduced stress

81. What is a machine?

A. Structure B. Link C. Joint D. Machine

82. What is a kinematic pair?

A. Kinematic pair B. Link C. Mechanism D. Frame

83. What is the gear ratio?

A. Diameter ratio B. Teeth ratio C. Speed ratio D. Torque ratio

84. What is a shaft?

A. Bearing B. Gear C. Coupling D. Shaft

85. What connects two shafts to transmit power?

A. Bearing B. Coupling C. Gear D. Clutch

86. What regulates engine speed?

A. Gear B. Bearing C. Flywheel D. Governor

87. What is a brake?

A. Brake B. Clutch C. Coupling D. Bearing

88. What type of brake uses a rotating drum and friction shoes?

A. Disc B. Band C. Shoe D. Drum

89. What is mechanical advantage?

A. Mechanical advantage B. Gear ratio C. Velocity ratio D. Efficiency

90. Which law states that two bodies in equilibrium with a third are in equilibrium with each other?

A. First Law of Thermodynamics B. Second Law of Thermodynamics C. Zeroth Law of Thermodynamics D. Third Law of Thermodynamics

91. What does the Third Law of Thermodynamics state?

A. Entropy approaches zero at absolute zero B. Entropy increases at absolute zero C. Entropy is constant at absolute zero D. Entropy is infinite at absolute zero

92. What is an isochoric process?

A. Isochoric B. Adiabatic C. Isobaric D. Isothermal

93. What is the definition of enthalpy?

A. H = U - PV B. H = U/T C. H = G + TS D. H = U + PV

94. What is internal energy?

A. Enthalpy B. Internal energy C. Entropy D. Gibbs free energy

95. What is Gibbs free energy?

A. G = H - TS B. G = U + PV C. G = H + TS D. G = U - TS

96. What is a Carnot engine?

A. Internal combustion B. Steam turbine C. Carnot engine D. Gas turbine

97. What is the efficiency of a Carnot engine?

A. η = (TH - TC)/TH B. η = (TH - TC)/TC C. η = TH/TC D. η = 1 - (TC/TH)

98. What cycle does a steam power plant operate on?

A. Otto cycle B. Diesel cycle C. Rankine cycle D. Brayton cycle

99. Which cycle is used in spark-ignition engines?

A. Diesel B. Otto C. Rankine D. Brayton

100. What does Clausius inequality state?

A. Kelvin-Planck statement B. Clausius-Clapeyron equation C. Clausius inequality D. Joule-Thomson effect

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