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Engineering :: Machine Design

71.  The holding power of sunk key is due to resistance which it offers in
A. Shear B. Crushing
C. Shear and crushing D. Tension
E. (C) and (D) above    
72.  Which of the following key transmits power through frictional resistance only
A. Saddle key B. Kennedy key
C. Woodruff key D. Sunk key
E. Tangent key    
73.  Splines are used when
A. The power to be transmitted is high B. The power to be transmitted is low
C. The torque is high D. rpm are high
E. Axial relative motion between shaft and hub is necessary    
74.  Splined shafts are commonly used in
A. Machine tools B. Bicycles
C. Aircraft D. Automobiles
E. None of the above    
75.  While designing a shaft, hub and a key, care is taken so that
A. Shaft is the stronger component B. Hub is the strongest component
C. Key is the strongest component D. Key is the weakest component
E. Shaft is the weakest component    
76.  Key normally used in wrist watch is
A. Kenned key B. Sunk key
C. Tangent key D. Woodruff key
E. None of the above    
77.  Iniversal coupling is
A. Used for collinear shafts B. Rigid coupling
C. Type of flange coupling D. Used for non-collinear shafts
E. None of the above    
78.  A flange coupling is
A. Used for non-collinear shafts B. Used for collinear shafts
C. Flexible D. Used only on small shafts rotating at slow speeds
E. None of the above    
79.  In flange coupling the weakest element should be
A. Flange B. Bolts
C. Bolt bush D. Shaft
E. Key    
80.  A muff type coupling
A. Is a simple type rigid coupling B. Is a simple type of flexible coupling
C. Is used for coplanar shafts D. Is used for non-coplanar shafts
E. Non of the above    

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