Civil Engineering

Q: A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be

(a) :  0.5 m/sec
(b) :  1.5 m/sec
(c) :  2.5 m/sec
(d) :  3.5 m/sec
(e) :  4.5 m/sec
Answer:  2.5 m/sec
Explanation:  

Q: For solving network problems of pipes, necessary condition is

(a) :  continuity equation
(b) :  energy equation
(c) :  Darcy-Weisbach equation
(d) :  all the above.
(e) :  None of these
Answer:  all the above.
Explanation:  

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