Manufacturing Design MCQ Questions Answers

1. Which one is a heavy duty key?

2. Which type of bevel gear connects two shafts whose axes intersect at right angles?

3. Calculate the heat generated in a bearing, given that the coefficient of the friction of the bearing is 5. The load on the bearing is 10 newtons and the rubbing velocity is 5 meters per second.

4. In a single start threaded worm gear, the lead is _________ the axial pitch.

5. Calculate the centrifugal tension in a belt, given that the mass of the belt per unit length is 2 pounds and the linear velocity of the belt is 10 meters per second.

6. Which rivet is extensively used for structural work and machine riveting?

7. If the velocity factor of a gear is 20 and the allowable static stress is 100 newtons per square millimeter, calculate the permissible working stress of the gear.

8. Calculate the circular pitch of a gear whose pitch circle diameter is 100 millimeters and which has 50 teeth.

9. The distance between the center of adjacent rivets on adjacent gauge lines is known as ________.

10. Calculate the polar moment of inertia of the shaft having a diameter of 20 millimeters.

11. Calculate the strength factor of a gear, given that the maximum bending stress is 40 newtons per square millimeter and the Lewis form factor is 10?

12. Which type of belt is used for shafts which rotate in opposite direction?

13. The pitch of the rivet should never be less than ________. Here d is the diameter of the rivet

14. The module of a gear is 10 millimeters and the number of teeth is 25. Calculate the pitch circle diameter of the gear.

15. The power transmitted is maximum in a belt drive, when the maximum tension in the belt is _______ the centrifugal tension.

16. Calculate the radius of curvature of a beam on which a bending stress of 1000 newtons per square meter is applied. The distance from extreme fiber to the neutral axis of the beam is 50 meters and the value of the Young's modulus for the material of the beam is 2 x 105 newtons per square meter.

17. Calculate the tensile strength of a double transverse fillet weld, given that the size of the weld is 5 millimeters and the length of the weld is 10 millimeters. The shear stress on the weld is 100 newtons per square millimeter.

18. Calculate the bearing characteristic number, given that the absolute viscosity of the lubricant is 10 pounds per meter second. The speed of the journal is 20 rpm and the bearing pressure is 10 newtons per square millimeter?

19. Calculate the diameter of the rivet hole if the thickness of the plate to be riveted is 9 millimeters.

20. In the above diagram, 's' is the length of the weld and 't' is the thread thickness. If 's' is 5 millimeters and 't' is 10 millimeters, calculate the area at the throat.

21. The value of the lateral strain in a steel rod is 100 meters and the value of the linear strain in the same rod is 300 meters. Calculate the Poisson's ratio.

22. The length of a weld under static loading is 70 millimeters and under fatigue loading is 150 millimeters. Calculate the effective length of the weld.

23. Which type of coupling is used when two shafts intersect at a small angle?

24. The value of the notch sensitivity factor of the material of the shaft is given below. Which value is the most desirable for the construction of the shaft?

25. In a long bearing, the ratio of the length of the journal to the diameter of the journal is ________.

26. What is the value of margin of a riveted joint which is kept to prevent the tearing of the riveted plates at the edges? Here d is the diameter of the rivet hole

27. If the strength of the key and the shaft is equal, then the length of the key will be _________.

28. Which one is the correct expression for equivalent twisting moment? Here, M is the bending moment and T is the twisting moment

29. ____________ are used to connect two non-parallel or intersecting shafts which are coplanar in nature.

30. Calculate the solid length of a spring, given that the number of coils in the spring is 10 and the diameter of the spring wire is 2 millimeters.

31. __________ is fixed at one end and free at the other end.

32. Which bearing is a hydrodynamic lubricated bearing?

33. Calculate the bending stress induced in the shank of the bolt, given that the length of the bolt is 10 millimeters, Young's modulus of material of bolt is 2 x 105 newtons per square millimeter and the difference in height between the extreme corners of the nut is 3 millimeters.

34. The mean diameter of the coil of a spring is 10 millimeters and the diameter of the spring wire is 5 millimeters. Calculate the spring index.

35. Calculate the shear modulus in a material which undergoes a shear strain of 10 meters. The shear stress applied on the material is 20 newtons per square meter.

36. The modulus of elasticity of material A is 100 newtons per square meter and of material B is 200 newtons per square meter. Calculate the modular ratio between the two materials.

37. __________ is the value of ratio of the maximum shear stress with load acting parallel to the weld to the maximum shear stress when load acts perpendicular to the weld.

38. Which type of belt among the following will give maximum efficiency, when used?

39. Calculate the attitude of a hydrodynamic journal bearing, given that the eccentricity of the bearing is 10 and the radial clearance is 5.

40. Calculate the power transmitted by a shaft, given that the twisting moment in the shaft is 20 newton meters and the speed of rotation of the shaft is 60 rpm.

41. Calculate the diameter of a hole which is to be drilled in a 50 millimeters bolt, given that the core diameter is 40 millimeters.

42. In a full journal bearing, the angle of contact of the bearing with the journal is ________.

43. The included angle in a British Standard Whitworth thread is __________.

44. Calculate the maximum shear stress developed in a rectangular cross sectional beam having an average shear stress of 50 newtons per square meter.

45. Calculate the force responsible for the shearing or crushing of a key, given that the radius of the shaft is 50 millimeters and the torsional moment transmitted by the shaft is 1000 newtons millimeter.

46. _________ is used only for the transmission of bending moment.

47. The value of the included angle for a V-belt is _________.

48. Which one is used for obtaining constant velocity ratios?

49. A feather key permits _____________.

50. In a screw thread, the nominal diameter represents the _________.

51. In a helical gear, the helix angle for a single helical gear ranges from _______.

52. The efficiency of a riveted joint is __________.

53. Calculate the twisting moment acting on the shaft which undergoes a torsional shear stress of 21 newtons per square millimeter. The diameter of the shaft is 300 millimeters and the polar moment of inertia of the shaft is 100 (millimeter)4.

54. If the diameter of the rivet hole is 10 millimeters, calculate the shearing area at the cross section of the rivet.

55. Calculate the flexural rigidity of a beam, given that the bending moment of the beam is 20, Young's modulus is 2 x 105 newtons per square meter and the moment of inertia is 20 (millimeter)4.

56. If the rivet hole diameter is 19.5 millimeters, calculate the nominal diameter of the rivet.

57. The diameter of a shaft is 100 millimeters. Calculate the width of the key.

58. Calculate the maximum shear stress in a circular fillet weld made between a circular rod of 50 millimeters diameter and a plate subjected to a torsional moment of 100 newton millimeters. The size of the weld is 5 millimeters and the diameter of the circular rod is 2 millimeters.

59. In the above drawn Mohr's circle for stress, which is the angle of obliquity?

60. In which type of gear does the pressure angle remains constant?

61. Calculate the factor of safety of a key in crushing, given that the yield stress in crushing is 400 newtons per square millimeter and crushing stress induced in the key is 100 newtons per square millimeter.

62. Which type of nut is used on objects which are subjected to sudden shocks and vibrations?

63. Calculate the crushing area per rivet, given that the diameter of the rivet hole is 20 millimeters and the thickness of the plate on which the riveting is done is 30 millimeters.

64. What is the value of impact stress on gradually applied loads?

65. Calculate the resilience of a body having a volume of 1000 cubic meters, which is subjected to a stress of 60 newtons per square meter. The Young's modulus for the material of the body is 2 x 105 newtons per square meter.

66. __________ theory is relevant to ductile materials.

67. The value of the stress concentration factor for static loading for a lap joint or a butt joint is _____.

68. The value of taper of a gib head key is ___________.

69. If the tension on the tight side of a belt is 10 newtons, the tension on the slack side is 5 newtons and the velocity of the belt is 10 meters per second, calculate the power transmitted by the belt.

70. If the shaft diameter is 20 millimeters, calculate the pitch circle diameter of the bolts for a flange coupling.

71. If the twisting moment in the hollow shaft is _______ the twisting moment of the solid shaft, then the strength of the hollow shaft becomes equal to the strength of the solid shaft.

72. Which property should have the lowest value while selecting a material for sliding contact bearing?

73. The resistance of a bolt can be increased by _________.

74. Calculate the length of the shaft on which a torque of 10 newton millimeters is applied. The polar moment of inertia on the shaft is 10 (millimeter)4. The angle of twist of the shaft is 10 radians and the modulus of rigidity is 10 newtons per square millimeter.

75. If the diameter of a thread is 100 millimeters calculate the core diameter of the thread.

76. Calculate the pitch of a thread, given that the number of threads per unit length of screw is 10.

77. For a plate thickness ranging between 10 millimeters to 16 millimeters, the minimum weld size will be __________.

78. Calculate the bending moment of a circular fillet weld made between a rod of 20 millimeters diameter and a plate. The maximum bending stress on the fillet weld is 100 newtons per square millimeter. The size of the weld is 10 millimeters.

79. The value of the groove angle of the pulley for rope drive is ___________.