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Engineering :: Machine Design

211.  The phenomenon of eloggation and contraction of the belt is known as
A. Slip B. Creep
C. Fatigue D. Elasticity
E. Plasticity    
212.  Cold working of materials
A. Increases the fatigue strength B. Reduces the fatigue strength
C. Does not change fatigue strength D. Has no effect on fatigue trength
E. None of the above    
213.  The stress concentration factor for flat bar in tension with a circular hole, is
A. 1 B. 1.25
C. 1.5 D. 2
E. 2.5    
214.  A positive infinitely variable (P.I.V.) system utilises
A. Variable pitch chain drive system B. Hydraulic variable speed drive
C. Rolling contact variable speed D. Vee belt variable speed system
E. None of the above    
215.  Bush bearings are
A. Phosphor bronze B. Aluminium brass
C. Mild steel D. White metal alloys
E. None of the above    
216.  A Babbit is
A. A eutectic of iron and iron phosphide B. A gadget for measuring volume
C. Antimony bearing lead or tin alloy D. A measure of magnetic induction produced in a material
E. None of these    
217.  For butt welding of two plates, each of which is 300 cm thick, the best process would be
A. Gas welding B. Submerged are welding
C. TIG welding D. MIG welding
E. Electro slag welding    
218.  The thickness of a gear tooth is measured
A. Along the pitch circle B. Along the root circle
C. Along the outer circle D. Average of the profile
E. None of the above    
219.  The part of the tooth which lies between the pitch and dedendum circle is known as
A. Face B. Root
C. Profile D. Flank
E. Base    
220.  The angle through which a gear turns from the beginning of contact of a pair of teeth until the contact reaches the pitch point, is known as
A. Pressure angle B. Angle of contact
C. Angle of approach D. Approach angle
E. Angle of action    

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