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Mechanical Previous Year questions

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deepa sahu
deepa sahu

1. Reducing roll diameter decreases roll separating force by reducing friction between rolls and metal. 2. A half nut is used to lock the lathe carriage and lead screw for thread cutting. 3. In resistance seam welding, the electrode is in the form of a circular disc. 4. An interference fit is a shrink fit.

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Mechanical Previous Year questions
Mechanical Previous Year questions
1. In the rolling process, roll separating force can be decreased by a) Reducing the roll diameter b) Increasing the roll diameter c) Providing back-up rolls d) Increasing the friction between rolls and the metal ( a ) 2. To lock the lathe carriage and the lead screw for thread cutting operation, the mechanism used is a) Half nut b) Tail stock c) Fly cutter d) Full nut ( a ) 3. In resistance seam welding , the electrode is in the form of a) Cylinder b) flat plate c) coil of wire d) circular disc ( d )
4. Which of the following is an interference fit? a) Push fit b) Running fit c) Sliding fit d) Shrink fit ( d ) 5. Tool material used in Electrical Discharge Machining is a) Tungsten Carbide b) Diamond c) Brass or Copper d) Stainless Steel ( c ) 6. Work hardening in ductile material increase its a) Ductility b) Plasticity c) Electrical conductivity d) Strength ( 4)
7. Screw dislocation in a material is a defect? a) Line b) Point c) plane d) Volumetric ( a ) 8. How many space lattices does Bravais Lattice crystal is a) 8 b) 7 c) 14 d) 6 ( c ) 9. In annealing operation of a steel casting , the cooling is done in a) Oil Bath b) Water c) air d) Furnace ( d ) 10. Which of the following is given by S-N curve for carbon steel? a) Ultimate Strength b) Yield Strength c) Toughness d) Fatigue limit ( d )
11. The equivalent length of a column having both ends fixed, is given by a) l/2 b) L c) 2l d) l/3 (a ) 12. At a principal plane a) Shear stress is Zero b) All stresses are zero c) Normal stress is zero d) Shear stress is maximum ( a ) 13.The number of independent elastic constants required to express the stress-strain relationship for a linearly elastic isotropic material is a) One b) Two c) Three d) Four ( b )
14. Which of the bearings given below should not be subjected to a thrust load? a) Deep groove ball bearing b) Angular contact ball bearing c) Cylindrical ( straight) roller bearing d) Single row tapered roller bearing ( c ) 15. A flange coupling is used a) For intersecting shaft b) For collinear shaft c) For small shaft rotating at slow speeds d) For parallel shafts ( b ) 16. A closed coiled helical sprig is subjected to an axial load. The stress which is not Produced in the wire of the spring is-----. a) Torsional shear stress b) Compressive stress c) Direct shear stress d) Bending stress ( b )
17. In block brakes, the ratio of shoe width and drum diameter is kept between a) 0.1 to 0.25 b) 0.25 to 0.50 c) 0.5 to 0.75 d) 0.75 to 1.0 ( b ) 18. What is the expansion of PWHT in welding? A) Pre Weld Heating Torch B) Post Weld Heating Torch C) Postal Weld Horizontal Treatment D) Post Weld Heat Treatment ( D) 19. The process of maintaining the speed of a steam turbine constant for various load conditions is known as A) Governing B) Bleeding C) Cooling D) Reheating ( A )
20. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as A) Principle of resolution of forces B) Principle of independence of forces c) All of the options d) Principle of transmissibility of forces ( b ) 21. What is the Moment of Inertia of a Quarter circle about its Diametral Axis? A) Πd^2 /36 B) πd^4 /256 C) πd^4 /128 D) πd^4 /64 ( b ) 22. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced are A) Compressive stress and tensile strain B) Tensile stress and tensile strain C) Compressive stress and compressive strain D) Tensile stress and compressive strain ( b )
23. The chemical formula of refrigerant R11 is A) CCl3F B) CClHF C) CHF D) CClF3 ( a ) 24. The process of enlarging the holes to accurate sizes is called A) Counter boring B) Drilling C) Reaming D) Knurling ( c ) 25. The product of area and square of distance of centre of gravity of the area from that axis is known as A) First moment of area B) Second moment of area C) Mass moment of inertia D) Second moment of mass ( b ) 26. G-ratio varies from ________ in very rough grinding. A) 11.0 to 15.0 B) 1.0 to 5.0 C) 16.0 to 20.0 D) 6.0 to 10.0 ( b )
27. The minimum angle made by an inclined plane with the horizontal such that an object placed on the inclined surface just begins to slide is called A) Angle of elevation B) Angle of friction C) Angle of latitude D) Angle of Repose ( d ) 28. Temperature inversion is a condition in which the temperature of the atmosphere A) Remains same B) Either increases or decreases with altitude C) Always increases with altitude D) Always decreases with altitude ( c ) 29. The distance from the joint root to the toe of the weld is called A) Effective throat B) Leg C) Actual throat D) Face ( b )
30. The length of the slot weld can be obtained from the ratio of A) Allowable stress to weld area B) Allowable stress to load C) Weld area to allowable stress D) Load to allowable stress ( d ) 31. Mercury does NOT wet the glass. This is due to the property of the liquid known as A) Cohesion B) Surface tension C) Adhesion D) Viscosity ( b ) 32. In reverse polarity welding, electrode holder is A) Connected to the positive and work to negative B) Connected to the negative and work to positive C) Earthed and work is negative D) Earthed and work is positive ( a ) 33. Which of the following bonds is represented by the letter 'E' in grinding wheel? A) Oxychloride B) Rubber C) Silicate D) Shellac ( d )
34. In a four-stroke cycle, the minimum temperature inside the engine cylinder occurs at the A) End of suction stroke B) Beginning of exhaust stroke C) End of exhaust stroke D) Beginning of suction stroke ( d ) 35. The vertical and uniformly spaced lines on a psychrometric chart indicate A) Wet bulb temperature B) Specific humidity C) Dew point temperature D) Dry bulb temperature ( d )
36. Thermit is a mixture of fine aluminium powder and iron oxide in the ratio of about _____ by weight. A) 1 : 2 B) 1 : 3 C) 3 : 1 D) 2 : 1 ( b ) 37. A concentration of 100 means ______ carat of grit per 1 cm3 of grinding wheel volume. A) 4.4 B) 2.2 C) 3.3 D) 5.5 ( a ) 38. __________ is the intersection of the flank and the base of the tool. A) Face B) Nose C) Shank D) Heel ( d )
39. What is the approximate freezing point of sulphur dioxide? A) -56.6° C B) -75.2° C C) -135.8° C D) -87.7° C ( b ) 40. Which of the following materials has nearly zero coefficient of expansion? A) Stainless steel B) Invar C) Silver D) Selenium ( b ) 41. Which of the following is used to check the diameters of holes? A) Standard screw pitch gauge B) Fillet gauge C) Slip gauge D) Plug gauge ( d ) 64% fe + 36% Ni
42. Which V block is used for checking triangle effect? A) V block with 90-degree angle is used B) V block with 60-degree angle is used C) V block with 30-degree angle is used D) V block with 120-degree angle is used ( d ) 43. A static fluid can have A) Zero normal stress and non-zero shear stress B) Non-zero normal stress and non-zero shear stress C) Negative normal stress and zero shear stress D) Positive normal stress and non-zero shear stress (c ) 44. Pre-planning stage in production planning and control includes which of the following activities? A) Dispatching B) Demand forecasting C) Inventory control D) Quality control ( b )
45. What is the angle between the two surfaces of an angle plate? A) 45° B) 180° C) 90° D) 120° ( c ) 46. Coulomb friction is the friction Between A) Two lubricated surfaces B) Solids and liquids C) Two dry surfaces D) Bodies having relative motion ( d ) 47. Coulomb friction is the friction between A) Two lubricated surfaces B) Solids and liquids C) Two dry surfaces D) Bodies having relative motion ( d )
48. ------consists of a mixture of clay, feldspar, flint and frit in varying proportions. a) Vitrified bond b) Rubber bond c) Shellac bond d) Silicate bond ( a ) 49. What is the full form of N.P.L. Gauge interferometer? A) Nikon Pulsed Laser B) National Physics Laboratory C) Nuclear Plasma Laboratory D) Nuclear Physics Laboratory ( b ) 50. Paper pulp can be regarded as A) Dilatant fluid B) Pseudo plastic fluid c) Newtonian fluid D) Bingham plastic fluid ( b )
Mechanical Previous Year questions

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Mechanical Previous Year questions

  • 3. 1. In the rolling process, roll separating force can be decreased by a) Reducing the roll diameter b) Increasing the roll diameter c) Providing back-up rolls d) Increasing the friction between rolls and the metal ( a ) 2. To lock the lathe carriage and the lead screw for thread cutting operation, the mechanism used is a) Half nut b) Tail stock c) Fly cutter d) Full nut ( a ) 3. In resistance seam welding , the electrode is in the form of a) Cylinder b) flat plate c) coil of wire d) circular disc ( d )
  • 4. 4. Which of the following is an interference fit? a) Push fit b) Running fit c) Sliding fit d) Shrink fit ( d ) 5. Tool material used in Electrical Discharge Machining is a) Tungsten Carbide b) Diamond c) Brass or Copper d) Stainless Steel ( c ) 6. Work hardening in ductile material increase its a) Ductility b) Plasticity c) Electrical conductivity d) Strength ( 4)
  • 5. 7. Screw dislocation in a material is a defect? a) Line b) Point c) plane d) Volumetric ( a ) 8. How many space lattices does Bravais Lattice crystal is a) 8 b) 7 c) 14 d) 6 ( c ) 9. In annealing operation of a steel casting , the cooling is done in a) Oil Bath b) Water c) air d) Furnace ( d ) 10. Which of the following is given by S-N curve for carbon steel? a) Ultimate Strength b) Yield Strength c) Toughness d) Fatigue limit ( d )
  • 6. 11. The equivalent length of a column having both ends fixed, is given by a) l/2 b) L c) 2l d) l/3 (a ) 12. At a principal plane a) Shear stress is Zero b) All stresses are zero c) Normal stress is zero d) Shear stress is maximum ( a ) 13.The number of independent elastic constants required to express the stress-strain relationship for a linearly elastic isotropic material is a) One b) Two c) Three d) Four ( b )
  • 7. 14. Which of the bearings given below should not be subjected to a thrust load? a) Deep groove ball bearing b) Angular contact ball bearing c) Cylindrical ( straight) roller bearing d) Single row tapered roller bearing ( c ) 15. A flange coupling is used a) For intersecting shaft b) For collinear shaft c) For small shaft rotating at slow speeds d) For parallel shafts ( b ) 16. A closed coiled helical sprig is subjected to an axial load. The stress which is not Produced in the wire of the spring is-----. a) Torsional shear stress b) Compressive stress c) Direct shear stress d) Bending stress ( b )
  • 8. 17. In block brakes, the ratio of shoe width and drum diameter is kept between a) 0.1 to 0.25 b) 0.25 to 0.50 c) 0.5 to 0.75 d) 0.75 to 1.0 ( b ) 18. What is the expansion of PWHT in welding? A) Pre Weld Heating Torch B) Post Weld Heating Torch C) Postal Weld Horizontal Treatment D) Post Weld Heat Treatment ( D) 19. The process of maintaining the speed of a steam turbine constant for various load conditions is known as A) Governing B) Bleeding C) Cooling D) Reheating ( A )
  • 9. 20. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as A) Principle of resolution of forces B) Principle of independence of forces c) All of the options d) Principle of transmissibility of forces ( b ) 21. What is the Moment of Inertia of a Quarter circle about its Diametral Axis? A) Πd^2 /36 B) πd^4 /256 C) πd^4 /128 D) πd^4 /64 ( b ) 22. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced are A) Compressive stress and tensile strain B) Tensile stress and tensile strain C) Compressive stress and compressive strain D) Tensile stress and compressive strain ( b )
  • 10. 23. The chemical formula of refrigerant R11 is A) CCl3F B) CClHF C) CHF D) CClF3 ( a ) 24. The process of enlarging the holes to accurate sizes is called A) Counter boring B) Drilling C) Reaming D) Knurling ( c ) 25. The product of area and square of distance of centre of gravity of the area from that axis is known as A) First moment of area B) Second moment of area C) Mass moment of inertia D) Second moment of mass ( b ) 26. G-ratio varies from ________ in very rough grinding. A) 11.0 to 15.0 B) 1.0 to 5.0 C) 16.0 to 20.0 D) 6.0 to 10.0 ( b )
  • 11. 27. The minimum angle made by an inclined plane with the horizontal such that an object placed on the inclined surface just begins to slide is called A) Angle of elevation B) Angle of friction C) Angle of latitude D) Angle of Repose ( d ) 28. Temperature inversion is a condition in which the temperature of the atmosphere A) Remains same B) Either increases or decreases with altitude C) Always increases with altitude D) Always decreases with altitude ( c ) 29. The distance from the joint root to the toe of the weld is called A) Effective throat B) Leg C) Actual throat D) Face ( b )
  • 12. 30. The length of the slot weld can be obtained from the ratio of A) Allowable stress to weld area B) Allowable stress to load C) Weld area to allowable stress D) Load to allowable stress ( d ) 31. Mercury does NOT wet the glass. This is due to the property of the liquid known as A) Cohesion B) Surface tension C) Adhesion D) Viscosity ( b ) 32. In reverse polarity welding, electrode holder is A) Connected to the positive and work to negative B) Connected to the negative and work to positive C) Earthed and work is negative D) Earthed and work is positive ( a ) 33. Which of the following bonds is represented by the letter 'E' in grinding wheel? A) Oxychloride B) Rubber C) Silicate D) Shellac ( d )
  • 13. 34. In a four-stroke cycle, the minimum temperature inside the engine cylinder occurs at the A) End of suction stroke B) Beginning of exhaust stroke C) End of exhaust stroke D) Beginning of suction stroke ( d ) 35. The vertical and uniformly spaced lines on a psychrometric chart indicate A) Wet bulb temperature B) Specific humidity C) Dew point temperature D) Dry bulb temperature ( d )
  • 14. 36. Thermit is a mixture of fine aluminium powder and iron oxide in the ratio of about _____ by weight. A) 1 : 2 B) 1 : 3 C) 3 : 1 D) 2 : 1 ( b ) 37. A concentration of 100 means ______ carat of grit per 1 cm3 of grinding wheel volume. A) 4.4 B) 2.2 C) 3.3 D) 5.5 ( a ) 38. __________ is the intersection of the flank and the base of the tool. A) Face B) Nose C) Shank D) Heel ( d )
  • 15. 39. What is the approximate freezing point of sulphur dioxide? A) -56.6° C B) -75.2° C C) -135.8° C D) -87.7° C ( b ) 40. Which of the following materials has nearly zero coefficient of expansion? A) Stainless steel B) Invar C) Silver D) Selenium ( b ) 41. Which of the following is used to check the diameters of holes? A) Standard screw pitch gauge B) Fillet gauge C) Slip gauge D) Plug gauge ( d ) 64% fe + 36% Ni
  • 16. 42. Which V block is used for checking triangle effect? A) V block with 90-degree angle is used B) V block with 60-degree angle is used C) V block with 30-degree angle is used D) V block with 120-degree angle is used ( d ) 43. A static fluid can have A) Zero normal stress and non-zero shear stress B) Non-zero normal stress and non-zero shear stress C) Negative normal stress and zero shear stress D) Positive normal stress and non-zero shear stress (c ) 44. Pre-planning stage in production planning and control includes which of the following activities? A) Dispatching B) Demand forecasting C) Inventory control D) Quality control ( b )
  • 17. 45. What is the angle between the two surfaces of an angle plate? A) 45° B) 180° C) 90° D) 120° ( c ) 46. Coulomb friction is the friction Between A) Two lubricated surfaces B) Solids and liquids C) Two dry surfaces D) Bodies having relative motion ( d ) 47. Coulomb friction is the friction between A) Two lubricated surfaces B) Solids and liquids C) Two dry surfaces D) Bodies having relative motion ( d )
  • 18. 48. ------consists of a mixture of clay, feldspar, flint and frit in varying proportions. a) Vitrified bond b) Rubber bond c) Shellac bond d) Silicate bond ( a ) 49. What is the full form of N.P.L. Gauge interferometer? A) Nikon Pulsed Laser B) National Physics Laboratory C) Nuclear Plasma Laboratory D) Nuclear Physics Laboratory ( b ) 50. Paper pulp can be regarded as A) Dilatant fluid B) Pseudo plastic fluid c) Newtonian fluid D) Bingham plastic fluid ( b )