NTS GAT 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 aluminum?

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

3. What is copper known for?

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

4. What materials include fiber-reinforced plastics?

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

5. What is a non-ferrous material?

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

6. What does the Charpy impact test measure?

A. Hardness B. Tensile strength C. Fatigue D. Toughness

7. What does the Rockwell test measure?

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

8. What is the Brinell test used for?

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

9. What is the yield strength?

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

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

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

11. What branch of mechanics studies motion without forces?

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

12. What is Newton's First Law?

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

13. What is Newton's Third Law?

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

14. What is the center of gravity?

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

15. What is a couple?

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

16. What is a truss?

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

17. What is kinetic energy?

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

18. What does the conservation of energy state?

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

19. What is viscosity?

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

20. What is Newton's law of viscosity?

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

21. What is the continuity equation for incompressible flow?

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

22. 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

23. What principle does a hydraulic lift work on?

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

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

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

25. What is the Mach number?

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

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

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

27. What is thermal conductivity?

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

28. What is radiation?

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

29. What is emissivity?

A. Absorptivity B. Reflectivity C. Transmissivity D. Emissivity

30. What is a heat exchanger?

A. Boiler B. Heat exchanger C. Condenser D. Evaporator

31. What is LMTD?

A. Average temperature B. Maximum temperature C. Log mean temperature difference D. Minimum temperature

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

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

33. What is thermal resistance?

A. Thermal resistance B. Thermal conductivity C. Heat flux D. Temperature gradient

34. What is the Prandtl number?

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

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

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

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

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

37. What uses phase change to transfer heat efficiently?

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

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

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

39. What dissipates heat by convection and radiation?

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

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

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

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

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

42. What cycle is used in compression-ignition engines?

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

43. What is the compression ratio?

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

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

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

45. What causes knocking in an ICE?

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

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

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

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

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

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

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

49. What converts wind energy into electricity?

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

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

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

51. What power plant uses both gas and steam turbines?

A. Single cycle B. Simple cycle C. Combined cycle D. Open cycle

52. What type of engine is used in a diesel power plant?

A. Gas turbine B. Diesel C. Steam D. Nuclear

53. What type of power plant uses organic materials?

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

54. What is forging?

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

55. What is machining?

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

56. What machining process uses an abrasive wheel?

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

57. What process produces hollow plastic parts?

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

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

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

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

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

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

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

61. What are mechanical vibrations?

A. Oscillatory motions B. Linear motion C. Rotational motion D. Static

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

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

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 is a Nyquist plot?

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 converts a signal into physical action?

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

68. What converts energy from one form to another?

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

69. What transform is used for frequency analysis?

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

70. What is the modulus of rigidity?

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

71. What is bulk modulus?

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

72. What is used in torsion calculations?

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

73. What test produces a stress-strain curve?

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

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

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

75. What is brittleness?

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

76. What is fatigue?

A. Creep B. Fracture C. Yield D. Fatigue

77. Why is a factor of safety used in design?

A. Accounts for uncertainties B. Not needed C. Fixed value D. Constant for all materials

78. What does the theory of machines deal with?

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

79. What is a mechanism?

A. Structure B. Machine C. Mechanism D. Frame

80. What is a machine?

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

81. What is a kinematic pair?

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

82. What is a gear?

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

83. What is a shaft?

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

84. What connects two shafts to transmit power?

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

85. What connects and disconnects two rotating shafts?

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

86. What stores rotational energy?

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

87. What regulates engine speed?

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

88. What type of drive uses friction between belt and pulley?

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

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

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

90. What is the coefficient of friction?

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

91. What is thermodynamics?

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

92. What does the Second Law of Thermodynamics state?

A. Energy is conserved B. Entropy always increases C. Equilibrium is reached D. Absolute zero is unattainable

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 Gibbs free energy?

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

95. What is a Carnot engine?

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

96. What is COP in refrigeration?

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

97. What cycle does an internal combustion engine operate on?

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

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

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

99. What does Clausius inequality state?

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

100. What is a saturated liquid?

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

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