HAT Subject (Mechanical Engineering) FLP 1 Free Quiz

1. What are the characteristics of polymers?

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

2. What is copper known for?

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

3. What is bronze?

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

4. What type of material is glass?

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

5. What element makes stainless steel corrosion-resistant?

A. Chromium B. Nickel C. Molybdenum D. Vanadium

6. What is hardness?

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

7. What is the Brinell test used for?

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

8. When does creep occur?

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

9. What does the tensile test measure?

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

10. What is the ultimate tensile strength?

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

11. What is engineering mechanics?

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

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

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

13. What branch of mechanics studies motion with forces?

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

14. What is a couple?

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

15. How does the coefficient of static friction compare to kinetic friction?

A. Less B. Equal C. Zero D. Greater

16. What is power?

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

17. What is potential energy?

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

18. What is a Newtonian fluid?

A. Newtonian B. Non-Newtonian C. Bingham D. Pseudoplastic

19. What is the continuity equation for incompressible flow?

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

20. What is laminar flow?

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

21. What does a Pitot tube measure?

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

22. What is the velocity profile for laminar flow in a pipe?

A. Parabolic B. Uniform C. Turbulent D. Linear

23. What device adds energy to a fluid?

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

24. What property of fluids is observed at interfaces?

A. Viscosity B. Density C. Compressibility D. Surface tension

25. What equation describes the motion of an inviscid fluid?

A. Euler equation B. Navier-Stokes equation C. Bernoulli equation D. Reynolds equation

26. What is heat transfer?

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

27. What is conduction?

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

28. What is thermal conductivity?

A. Density B. Thermal conductivity C. Specific heat D. Thermal diffusivity

29. What is convection?

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

30. What is Newton's Law of Cooling?

A. Fourier's Law B. Stefan-Boltzmann C. Newton's Law of Cooling D. Planck's Law

31. What is a blackbody?

A. White body B. Gray body C. Blackbody D. Transparent body

32. What does U represent in heat transfer?

A. Overall heat transfer coefficient B. Convective coefficient C. Thermal conductivity D. Thermal resistance

33. What is the Nusselt number?

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

34. What dimensionless number indicates flow regime in heat transfer?

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

35. What number is used in natural convection?

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

36. What number compares internal and external thermal resistances?

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

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

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

38. What dissipates heat by convection and radiation?

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

39. How does the compression ratio of a diesel engine compare to a gasoline engine?

A. Lower B. Equal C. Higher D. Variable

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

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

41. What converts wind energy into electricity?

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

42. What type of power plant uses Earth's heat?

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

43. What type of power plant uses organic materials?

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

44. What machining process uses a lathe?

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

45. What machining process uses a rotating cutter?

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

46. What machining process produces holes?

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

47. What machining process uses an abrasive wheel?

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

48. What joining process fuses materials using heat?

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

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

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

50. What molding process uses heat and pressure for thermosetting materials?

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

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

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

52. What heat treatment process reduces brittleness after quenching?

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

53. What is CNC machining?

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

54. What uses machines and control systems for production?

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

55. What is forced vibration?

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

56. When does resonance occur?

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

57. What manages the behavior of a dynamic system?

A. Sensor B. Actuator C. Controller D. Control system

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

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

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

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

60. What does the proportional controller do?

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

61. Which controller eliminates steady-state error?

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

62. What does the derivative controller do?

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

63. What is the characteristic equation?

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

64. What determines overshoot and settling time in a second-order system?

A. Damping ratio B. Natural frequency C. Gain D. Time constant

65. What does a root locus plot show?

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

66. What representation uses state variables?

A. State-space B. Transfer function C. Frequency response D. Impulse response

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

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

68. What transform is used in control systems for analysis?

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

69. What transform is used for frequency analysis?

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

70. What is Poisson's ratio?

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

71. What is bulk modulus?

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

72. What is the flexural formula for bending stress?

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

73. What is used in torsion calculations?

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

74. What is the yield strength?

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

75. What is the ultimate tensile strength?

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

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

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

77. What is toughness?

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

78. What is hardness?

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

79. What is creep?

A. Fatigue B. Fracture C. Creep D. Elastic deformation

80. What is the fatigue limit?

A. Yield stress B. Fatigue limit C. Ultimate stress D. Fracture stress

81. What does the theory of machines deal with?

A. Mechanisms and their motion B. Design only C. Manufacturing only D. Materials only

82. What is a kinematic pair?

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

83. What is the most common gear tooth profile?

A. Involute B. Cycloidal C. Straight D. Spiral

84. What type of bearing supports a rotating shaft with lubricant?

A. Ball bearing B. Roller bearing C. Thrust bearing D. Journal bearing

85. What type of bearing uses rolling elements?

A. Journal B. Ball C. Thrust D. Plain

86. What connects two shafts to transmit power?

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

87. What type of drive uses sprockets?

A. Belt B. Gear C. Chain D. Rope

88. What type of brake uses a rotating disc and friction pads?

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

89. What is the coefficient of friction?

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

90. What is velocity ratio?

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

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 isobaric process?

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

93. What is an isochoric process?

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

94. What is internal energy?

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

95. What transfers heat from cold to hot using work?

A. Refrigerator B. Heat pump C. Heat engine D. Generator

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

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

97. Which cycle is used in gas turbines?

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

98. What type of process is throttling?

A. Constant entropy B. Constant enthalpy C. Constant internal energy D. Constant temperature

99. What is a pure substance in thermodynamics?

A. Mixture B. Solution C. Compound D. Pure substance

100. What is a saturated liquid?

A. Superheated B. Saturated liquid C. Subcooled D. Compressed

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