1. In flange coupling the weakest element should be

A. Flange

B. Key

C. Bolts

D. shaft

2. A flange coupling is

A. Used for Collinear shaft

B. Used for non-collinear shafts

C. Rigid coupling

D. Flexible 

3. Universal coupling is

A. Used for collinear shafts

B. Used for Non-collinear shaft

C. Type of flange coupling

D. Rigid coupling

4. Splines are used when

A. The power transmitted is low

B. The power to be transmitted is high

C. Axial Relative motion between shafts and hub is necessary

D. Flame hardening 

5. A type of coupling that allows slight amount of torsional angular flexibility due to introduction with some elastic material cylindrically wrapped around the bolts in the flange.

A. Simple elastic bonded coupling

B. Elastic Material bushed coupling

C. Elastic material bonded coupling

D. D. All of the above 

6. A shaft is to be checked for concentricity. A suitable method of performing the check is

A. Bench Centers and dial indicator

B. Line shafting bearing alignment

C. Observing vibration of the shafting

D. D. None of these

7. What is the rotating member used in transmitting power?

A. Shaft

B. Counter shaft

C. axle

D. Washer

8. How do you call the key which permits axial relative motion between the shaft and hub?

A. Tangent key

B. Feather Key

C. Gib head key

D. Wood ruff key 

9. It is a good design practice for steel line shafting to consider a limit to the linear deflection of inch/foot length maximum.

A. 0.050

B. 0.010

C. 0.020

D. 0.060 

10. Alloy steel axle under repeated load/stress will eventually fail if the load/stress is above the endurance for the steel under consideration. The endurance limit of the steel is therefore:

A. Equal to the allowable stress of the module of elasticity B. Equal to half of the Ultimate strength

C. Equal to module of elasticity

D. Equal to 80% of the elastic limit 

11. Which of the following statement(s) is correct?

A. Cold rolled shafting as compared to hot rolled shafting is weaker.

B. Cold rolled shafting as compared to hot rolled shafting is Stronger

C. Cold rolled shafting is the same strength as compared to hot rolled shafting.

D. Cold rolled shafting has no advantage over hot rolled shafting.

12. Axially located rectangular groove in a hub and shaft.

A. Keyseat

B. Cotter pin set

C. Flute

D. Setscrew point 

13. Which of the following flanges is suitable for low and moderate pressure?

A. Ring-Flange

B. Lap joint flange

C. Tapered-hub flange

D. Welding neck type

14. For a good design of flange coupling, the hub length must not be less than the shaft diameter.

A. Twice

B. 1.5 Times

C. Thrice

D. 2.5 times

15. A shaft is designed on the basis of which of the following?

A. Strength

B. Rigidity

C. Strength and Rigidity

D. Flexibility

16. For machinery shafts, the permissible deflection is approximately_____.

A. 0.02 in./ft

B. 0.03 in.in./ft

C. 0.01 in./ft

D. 0.05 in./ft

17. The couplings used to connect two shafts which are out of line, or nonparallel shafts.

A. Muff coupling

B. Oldham coupling

C. Universal coupling

D. Universal and Oldham coupling

18. For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is

A. minimum

B. Constant

C. Maximum also

D. Zero

19. What is the other name given to short shafts on machines?

A. Spindles

B. Head shafts

C. Core shafts

D. All of these

20. Taper in key is provided on which side?

A. Bottom

B. Top

C. Both top and bottom

D. Any depending on the situation 

21. In flange coupling, the bolt circle diameter is usually the diameter of the shaft.

A. 3 times

B. 4 times

C. 5 times

D. D. Twice

22. What is the other name given to a line shaft.

A. Countershaft

B. Main Shaft

C. long shaft

D. head shaft

23. Flexible shafts are usually made of what?

A. Solid steel rod

B. Thin mild steel rod

C. Wavy steel wires

D. None of these

24. The speed at which the center of mass will be equal the deflecting forces on the shaft; the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns in

A. nominal speed

B. Critical Speed

C. Relative speed

D. Mean speed

25. Which of the following is the coupling used to connect two shafts with a considerable angular misalignment?

A. Hooke's joint Coupling

B. Flange coupling

C. Sleeve Coupling

D. Oldham Coupling 

26. An old rule of thumb for transmission shafting is that the deflection should not exceed of length between supports.

A. 0.01 in. per foot

B. 0.08 in. per foot

C. 0.02 in. per foot

D. 0.05 in. per foot

27. How do you call the key made from a cylindrical disc having segmental cross-section?

A. Feather key

B. Tangent key

C. Gib head key

D. Woodruff Key

28. For transmission shafts the allowable deflection is 1degree in a length of diameters.

A. 20

B. 25

C. 30

D. 40

A. 20

29. It is known as the torque required to produce a twist of one radian per unit length of the shaft.

A. Torsional Rigidity

B. Polar deflection

C. Flexural rigidity

D. Minimum twisting moment

30. What is the most commonly used cross-section of the key?

A. Rectangular

B. Circular

C. Square

D. Trapezoidal

31. The motion of a shaft in a circular hole is an example motion.

A. Successful constraint

B. Free

C. Completely constraint

D. Incompletely Constraint 

32. A muff coupling is also known as

A. A Rigid coupling

B. A flexible coupling

C. An adjustable coupling

D. A universal coupling

A. A Rigid coupling

33. What is the limiting torsional deflection for machinery shafts, if the criteria of limiting torsional deflection vary from 0.08° per foot of length.

A. 1°

B. 2.5°

C. 2°

D. 3.5° 

34. What type of key that allows the hub to move along the shaft but prevents the rotation of the shaft?

A. Woodruf Key

B. Feather Key

C. Gibbs Key

D. Square Key

B. Feather Key

35. What is the other name for Kennedy key?

A. Tangential Key

B. Woodruff key

C. Saddle key

D. Rollpin

36. What type of fits used for involute spline?

A. Close fit

B. Press fit

C. Sliding fit

D. All of these

37. What is the minimum number of bolts in a flange coupling?

A. 2

B. 3

C.5

D.4 

38. Which of the following is used for permanent fits and similar to involute splines except that the pressure angle is 14.5°?

A. Separation load

B. Spline shaft

C. Stub serrations

D. Involute Serrations

39. Which of the following is the key to be used when relative axial movement of the hub is required?

A. Flat saddle key

B. Feather Key

C. Woodruff key

D. Tangent key 

40. It is used as a coupling, or in addition to another couplings where, in case of overload, there is danger of injury to machine or to material in process.

A. Shear Pin

B. Flange coupling

C. Involute serrations

D. King pin

41. Which of the following is the type of coupling used to connect two shafts having relative speeds?

A. Flexible coupling

B. Compression coupling

C. Flange coupling

D. Fluid Coupling 

42. What is the maximum shaft angle for a single Hooke's coupling?

A. 10°

B. 17°

C. 15°

D. 20° 

43. Which of the following is the key provided in pairs at right angles and is to withstand torsion in one direction only?

A. Saddle key

B. Tangent Key

C. Round key

D. Sunk key 

44. Two shafts at rigid angles to each other may be connected by what arrangement?

A. Half turn

B. Quarter Turn

C. 3/4 turn

D. One turn 

45. A typical hub length fall between

A. 1.25D to 2.5D

B. 1.3D to 3.4D

C. 1.25D to 4.0D

D. D to 7.0D

46. The couplings used to connect two shafts which are parallel and in line.

A. Split coupling

B. Muff coupling

C. Compression coupling

D. Any of these

47. In designing a flange coupling, the hub diameter is usually taken as the shaft diameter.

A. One-half

B. 1.5 Times to twice

C. Thrice

D. 3.5 times 

48. A key with one several patented methods of keying is driven or pressed into a hole that is small enough to close the slit, assembled in radial direction.

A. Fit key

B. Roll Pin

C. Saddle key

D. Pin key

49. What do you think is the stress at the center of a solid shaft?

A. Maximum

B. Minimum

C. Infinite

D. None of these

50. Which type of fit on a hole-shaft system is specified as H7-s6?

A. close fit

B. Sliding fit

C. Press fit

D. Interference Fit

51. Which of the following transmits power through frictional resistance only?

A. Saddle Key

B. Sunk key

C. Square key

D. Wood ruff key

52. A coupling that transmit power via the frictional forces induced by pulling the flange toward each other over slotted tapered sleeves.

A. Flange coupling

B. Ribbed compression coupling

C. Rigid coupling

D. Flanged Compression coupling

53. A coupling used for absorbing some shock and vibration that may appear on one shaft and of preventing the occurrence of reversed stresses caused by the shaft deflecting at the coupling preventing at the coupling.

A. Rigid coupling

B. Flange coupling

C. Flexible Coupling

D. None of these

54. If two intersecting shafts are to be belt connected guide pulleys are to be used.

A. A.1

B. B.2

C. C.3

D. 4 

55. Find the polar section modulus of a steel shafting with "D" as the diameter.

A. πD3/16

B. πD3/32

C. πD3/4

D. πD3/64

A. πD3/16

56. .The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1.25D to 2D where D is the shaft diameter. What should be the reasonable diameter of steel hub?

A. 2D

B. 1.55 D

C. 1.8D

D. 1.20 D

57. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of how many degree/foot of length?

A. 0.4 to 1

B. 0.08 to 1

C. 0.1 to 1

D. 0.6 to 1

58. Shafts readily available in the market are made in many ways and wide variety of material composition. It is likely be cold drawn carbon steel in size smaller than inches diameter.

A. 3.75

B. B.5

C. C.4

D. 51/2

59. Which of the following flanges is suitable for low and moderate pressure?

A. Ring-Flange

B. Lap joint flange

C. Tapered-hub flange

D. Welding neck type

60. Which of the following is a loose clearance fit that is used for properly lubricated bearings?

A. H6-e7

B. H8-e8

C. H7-e8

D. All of these

61. For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is

A. Minimum

B. Constant

C. Maximum also

D. Zero

62. The minimum value of numerical combined shock and fatigue factor to be applied in every case to the computed bending moment of the shaft is

A. 2.0

B. 1.75

C. 1.5

D. 1.3 

63. A key that may either straight or tapered. It is usually a drive fit.

A. pin keys

B. Gib-Head keys

C. Saddle keys

D. None of these 

64. Which of the following is usually the radius that is to be considered in stress calculation for a hollow shaft subjected to torsion?

A. Outer radius

B. Inner radius

C. Mean radius

D. None of these

65. It is used as a coupling, or in addition to another couplings where, in case of overload, there is danger of injury to machine or to material in process.

A. Shear Pin

B. Flange coupling

C. Involute serrations

D. King pin 

66. For a simple rigid type coupling (or muff coupling), two shafts are connected to the muff by means of what?

A. They are connected by a single key

B. They are connected by Two keys

C. They are connected by using Bolts

D. All of these

67. What is the limiting torsional deflection for machinery shafts, if the criteria of limiting torsional deflection vary from 0.08° per foot of length.

A. 1°

B. 2.5°

C. 2°

D. 3.5°

68. In the design of machine members, keys are generally made of

A. High carbon steel

B. Mild Steel

C. Cast Iron

D. Stainless Steel

69. What is the torsional rigidity of a shaft?

A. It is the product of modulus of Rigidity and polar moment of inertia

B. It is the ratio of modulus of rigidity and polar moment of inertia

C. It is the difference between polar moment of inertia and modulus of rigidity

D. None of these

70. A key that are square or flat and tapered with head.

A. Pin key

B. Gib-Head key

C. Saddle keys

D. None of these 

71. To ensure an adequate factor of safety in the design of a shaft with standard keyway, the key width should be about

A. About half of the shaft diameter

B. About one Fourth of the shaft diameter

C. About two-third of the shaft diameter

D. About one third of the shaft diameter

72. Which of the following is the most preferred type of key for situation where large amount of impact type torque is to be transmitted in both direction of rotation?

A. Tangent Key

B. Saddle Key

C. Feather key

D. Gib head key

73. What type of key that allows the hub to move along the shaft but prevents the rotation of the shaft?

A. Woodruf Key

B. Feather Key

C. Gibbs Key

D. Square Key 

74. Which of the following statements is true for universal coupling?

A. Universal coupling is used for colinear shaft only.

B. Universal coupling must be a rigid coupling.

C. Universal coupling is a unique type of flange coupling.

D. Universal coupling is used for non-colinear shaft. 

75. A shaft's natural frequency of vibration is referred to as the

A. normal speed

B. high speed

C. critical speed

D. low speed 

76. Generally, for a good design the thickness of the key is as the diameter of the shaft?

A. One-sixth

B. One-tenth

C. One-half

D. Two-third

77. What type of key is used when the gear is required to slide on the shaft?

A. Semi-circular key

B. Feather key

C. Woodruff key

D. Tangential key 

78. A coupling that transmit power via the frictional forces induced by pulling the flange towards each other over slotted tapered sleeves.

A. Flange coupling

B. Ribbed compression coupling

C. Rigid coupling

D. Flanged compression coupling

79. Which of the following will best describe sunk key?

A. The keyway is helical along shaft

B. The keyway is cut in shaft only

C. The keyway is cut in hub only

D. The keyway is cut in both Shaft and hub

80. Which of the following is experienced by the shaft as it transmits power through gears?

A. Bending stress only

B. Torsional stress only

C. Constant Bending and varying torsional stress

D. Constant torsional stress and fluctuating axial stress.

81. It is a general practice to use the following allowable stresses 4000 psi for main transmitting shaft and 8500psi for small short shafts and counter shaft, for line shaft carrying pulley it is psi

A. 7800

B. 6000

C. 7000

D. 6500

82. Which of the following is the key that will most likely be used for light work?

A. Saddle Key

B. Tangent key

C. Round key

D. Sunk key

83. Which of the following is the standard taper provided in a taper key?

A. 1:100

B. 1:40

C. 1:120

D. 1:60

A. 1:100

84. A coupling that allows axial flexibility/movement in the operation. Made of alternate bolting of steel, leather, fabric and/or plastic material into the two flanges

A. Flexible Disk coupling

B. Flexing Oldham coupling

C. Flexible toroidal spring coupling

D. Elastic-material bonded coupling

85. Which type of key is used for mounting shifting gears in gear boxes?

A. Splines

B. Square

C. Saddle

D. Flat

86. Which of the following is the type of key in which width and thickness are equal?

A. Flat key

B. Square Key

C. Pin key

D. Barth key 

87. For key design, the typical hub lengths (L) in relation with the shaft diameter (D) is

A. 1.25D to 2.4D

B. 1.5D to 1.25D

C. 2.4D to 3.5D

D. Depends on shaft diameter

88. What is the largest twisting moment which a shaft section can resist?

A. The torsional rigidity of the shaft.

B. Maximum shear stress x unit strain

C. Maximum shear stress x polar Modulus

D. Ratio of the polar moment of inertia and section modulus 

89. How do you call the speed at which a rotating shaft becomes dynamically unstable?

A. Normal speed

B. Variable speed

C. Critical Speed

D. Average speed

90. The shaft's angle of twist is proportional to which of the following?

A. Directly proportional to the square of its diameter

B. Inversely proportional to the square of its diameter

C. Inversely proportional to the 4th power of its diameter D. Directly proportional to the 4th power of its diameter

91. At certain speeds called the critical speeds, a rotating shaft will become dynamically unstable and the resulting vibrations and deflections can result in damage not only to the shaft but to the machine of which it is a part. At what percentage of the critical speed should a shaft be safely operated?

A. ±20%

B. ±5%

C. ±10%

D. ±12 

92. The bolts in a rigid coupling connecting two shafts that transmit power are subjected to

A. Axial force only

B. Torsional stress only

C. Shear force and bending moment

D. Compressive stress and transversal force

93. Which of the following is the weakest element in flange coupling?

A. Key

B. Bolt

C. Flange

D. Shaft

94. The critical speed of the shaft depends on which of the following?

A. Dynamic stability

B. Mass only

C. Stiffness only

D. Mass and Stiffness 

95. For which of the following where splined shaft is commonly used?

A. Aircraft

B. Bicycle

C. Lathe machine

D. Automobiles

96. The steel key that is usually considered strong in failure by shear and crushing?

A. Square

B. Rectangular

C. Circular

D. Flat

97. Which of the following is considered in the design of axles?

A. Twisting moment only

B. Bending moment only

C. Combined Torsion and bending moment

D. Combined axial and transversal moment

98. The material used for ordinary commercial shafting is

A. Wrought iron

B. High speed steel

C. High grade steel

D. Mild Steel 

99. This is a form of flexible coupling that is especially adapted for connecting two shafts which are parallel but not in line.

A. Oldham Coupling

B. Flexible Coupling

C. Flange Coupling

D. Sleeve Coupling

100. This is also known as compression coupling or split muff coupling.

A. Clamp Coupling

B. Fluid coupling

C. Oldham coupling

D. Bellow