HAT Subject (Mechanical Engineering) FLP 2 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 polymers?

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

3. What are the characteristics of ceramics?

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

4. What are the characteristics of cast iron?

A. Low carbon B. High ductility C. Good corrosion resistance D. High carbon, brittle

5. What is brass?

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

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 material is glass?

A. Ceramic B. Polymer C. Metal D. Composite

9. What type of polymer hardens irreversibly when heated?

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

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

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

11. What does the Rockwell test measure?

A. Tensile B. Hardness C. Impact D. Fatigue

12. What is the Brinell test used for?

A. Brinell B. Tensile C. Impact D. Fatigue

13. What is the ultimate tensile strength?

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

14. What branch of mechanics studies motion without forces?

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

15. What branch of mechanics studies motion with forces?

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

16. What is Newton's First Law?

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

17. What is Newton's Third Law?

A. Action and reaction B. F = ma C. Law of inertia D. Conservation of momentum

18. What is the centroid?

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

19. What condition is required for equilibrium of a body?

A. Sum of forces only B. Sum of moments only C. Sum of forces and moments zero D. Sum of velocities zero

20. What is a beam?

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

21. What is a column?

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

22. What is kinetic energy?

A. Potential energy B. Kinetic energy C. Thermal energy D. Chemical energy

23. What is a fluid?

A. Solid B. Elastic material C. Fluid D. Plastic

24. What is Newton's law of viscosity?

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

25. What is turbulent flow?

A. Laminar flow B. Transitional flow C. Turbulent flow D. Steady flow

26. What is the boundary layer in fluid flow?

A. Core flow B. Wake C. Potential flow D. Boundary layer

27. What principle does a hydraulic lift work on?

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

28. What equation calculates head loss due to friction in pipes?

A. Bernoulli equation B. Hagen-Poiseuille C. Darcy-Weisbach D. Manning equation

29. What is determined from the Moody chart?

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

30. What is specific gravity?

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

31. What is capillary action caused by?

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

32. When is flow considered compressible?

A. Incompressible flow B. Subsonic flow C. Compressible flow D. Supersonic flow

33. What is conduction?

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

34. What does the convective heat transfer coefficient depend on?

A. Constant B. Material property C. Independent D. Depends on fluid and flow

35. Which type of heat transfer does not require a medium?

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

36. What is the Nusselt number?

A. Reynolds number B. Prandtl number C. Nusselt number D. Grashof number

37. What number is used in natural convection?

A. Grashof B. Reynolds C. Prandtl D. Nusselt

38. What is used to increase heat transfer by increasing surface area?

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

39. What number compares internal and external thermal resistances?

A. Fourier number B. Nusselt number C. Prandtl number D. Biot number

40. What is the Fourier number?

A. Biot B. Fourier C. Nusselt D. Prandtl

41. What is an internal combustion engine?

A. Burns fuel inside cylinders B. Burns fuel outside C. Turbine engine D. Electric motor

42. How many strokes are in a four-stroke engine?

A. Three B. Four C. Five D. Six

43. What is the compression ratio?

A. Vmax/Vmin B. Vmin/Vmax C. Vmax + Vmin D. Vmax - Vmin

44. What does the octane number indicate?

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

45. What uses exhaust gases to increase intake air pressure?

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

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

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

47. What type of power plant uses water to generate electricity?

A. Hydroelectric B. Thermal C. Nuclear D. Solar

48. What converts solar energy into electricity?

A. Wind B. Hydro C. Geothermal D. Solar

49. What uses a heat exchanger to preheat air in a gas turbine?

A. Regeneration B. Intercooling C. Reheat D. Cogeneration

50. What reduces the work of compression in a gas turbine?

A. Regeneration B. Reheat C. Intercooling D. Cogeneration

51. What type of power plant uses organic materials?

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

52. What is casting?

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

53. What is extrusion?

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

54. What machining process uses an abrasive wheel?

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

55. What joining process uses a filler metal below 450°C?

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

56. What manufacturing process involves pressing and sintering metal powders?

A. Casting B. Forging C. Powder metallurgy D. Machining

57. What molding process is similar to compression with preheating?

A. Injection molding B. Blow molding C. Transfer molding D. Compression molding

58. What sheet metal process produces cup-shaped parts?

A. Deep drawing B. Bending C. Stamping D. Spinning

59. What heat treatment process softens a metal?

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

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

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

61. What case hardening process adds carbon to the surface?

A. Nitriding B. Cyaniding C. Induction hardening D. Carburizing

62. What uses machines and control systems for production?

A. Manual B. Semi-automated C. Automated D. Manual

63. What is free vibration?

A. Forced vibration B. Damped vibration C. Free vibration D. Resonant vibration

64. What is forced vibration?

A. Free vibration B. Damped vibration C. Undamped vibration D. Forced vibration

65. What type of control system uses output to adjust input?

A. Open-loop B. Feedback (closed-loop) C. Feedforward D. Adaptive

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

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

67. Which controller eliminates steady-state error?

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

68. What does the derivative controller do?

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

69. What is the transfer function?

A. Time ratio B. Frequency ratio C. Laplace ratio D. Gain

70. What is the characteristic equation?

A. Numerator zero B. Gain zero C. Input zero D. Denominator zero

71. What is a Nyquist plot?

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

72. What does a root locus plot show?

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

73. What measures a physical quantity and converts it to a signal?

A. Actuator B. Controller C. Sensor D. Transducer

74. What transform is used for frequency analysis?

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

75. What is stress?

A. Strain B. Modulus C. Stress D. Deformation

76. What is shear strain?

A. Normal strain B. Bulk strain C. Lateral strain D. Shear strain

77. What is Poisson's ratio?

A. Modulus of rigidity B. Poisson's ratio C. Bulk modulus D. Elastic modulus

78. What is the modulus of rigidity?

A. Modulus of rigidity B. Young's modulus C. Bulk modulus D. Poisson's ratio

79. What is bulk modulus?

A. Young's modulus B. Shear modulus C. Bulk modulus D. Poisson's ratio

80. What is the flexural formula for bending stress?

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

81. What is the torsion formula?

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

82. What relates bending stress to bending moment?

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

83. What is the factor of safety?

A. Yield stress / Allowable stress B. Ultimate stress / Allowable stress C. Ultimate stress / Yield stress D. Allowable stress / Ultimate stress

84. What test produces a stress-strain curve?

A. Hardness test B. Impact test C. Creep test D. Stress-strain test

85. What region of the stress-strain curve has permanent deformation?

A. Plastic B. Elastic C. Rupture D. Necking

86. What is hardness?

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

87. What is a link in a mechanism?

A. Joint B. Link C. Frame D. Mechanism

88. What is the gear ratio?

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

89. What is a cam?

A. Cam B. Follower C. Gear D. Bearing

90. What is the stiffness of a spring?

A. Deflection B. Stiffness C. Energy D. Mass

91. What is the coefficient of friction?

A. Stiffness B. Coefficient of friction C. Damping D. Elasticity

92. What is mechanical advantage?

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

93. What is thermodynamics?

A. Heat, work, and energy transformations B. Heat transfer only C. Fluid flow only D. Combustion only

94. What is an isothermal process?

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

95. What is an isobaric process?

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

96. What is an isochoric process?

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

97. What is internal energy?

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

98. What is a Carnot engine?

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

99. What is COP in refrigeration?

A. Coefficient of Performance B. Thermal efficiency C. Isentropic efficiency D. Mechanical efficiency

100. What is the compressibility factor Z?

A. Z = 1 for all gases B. Z = 0 for ideal gases C. Z = infinity for ideal gases D. Z = PV/nRT

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