Fluid Mechanics Sheet 19
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1) Question.
A perfect gas at is heated at constant pressure till its volume is doubles. The final temperature of the gas is -
Answer. -
2) Question.
For the resistance to motion of a ship's model through water, the basic similitude criteria is
i) Reynolds Law
ii) Froude's Law
iii) Weber's Law
The correct answer is -
Answer. -
3) Question.
Analysis of a surge in open channels is carried out by using
i) Navier Stoke's equation
ii) energy equation
iii) continuity equation
iv) momentum equation
The correct answer is -
Answer. -
4) Question.
For any channel section, the specific energy increases with
i) increase in depth of sub critical flow
ii) increase in depth of super critical flow
iii) decrease in depth of sub critical flow
iv) decrease in depth of super critical flow
The correct answer is -
Answer. -
5) Question.
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is -
Answer. -
6) Question.
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is -
Answer. -
7) Question.
The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is -
Answer. -
8) Question.
If there are n pipes of same diameter d laid in parallel in place of a single pipe of diameter D, then -
Answer. -
9) Question.
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is -
[ R = radius of pipe ]
Answer. -
10) Question.
The depth 'd' below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be -
[ D= depth of flow ]
Answer.
