1. The rise of liquid along the walls of a revolving cylinder as compared to depression at the center with respect to initial level is ?

same

more

less

more or less depending on speed

Answer: same

Explanation:


2. The most economical section of a rectangular channel for maximum discharge is obtained when its depth is equal to ?

half the breadth

twice the breadth

same as the breadth

three-fourth of the breadth

Answer: half the breadth

Explanation:


3. In case of a two dimensional flow the components of velocity are given by u+ax; v=by; the point where no motion occurs, is known as ?

critical point

neutral point

stagnation point

None of these

Answer: None of these

Explanation:


4. The head loss in case of hot water flow through a pipe compared to cold water flow will be ?

same

more

less

more or less depending on range of temperatures

Answer: less

Explanation:


5. Maximum efficiency of transmission of power through a pipe is ?

0.25

0.3333

0.5

0.6667

Answer: 0.6667

Explanation:


6. In the case of turbulent flow ?

it occurs in open channel

losses are proportional to square of velocity

velocity at boundary is zero

shear stresses are more compared to laminar flow

Answer: shear stresses are more compared to laminar flow

Explanation:


7. Hydraulic grade line for any flow system as compared to energy line is ?

above

below

at same level

may be below or above depending upon velocity of flow

Answer: below

Explanation:


8. For maximum discharge through a circular open channel, the ratio of depth of flow to diameter of channel should be ?

0.7

0.5

0.65

None of these

Answer: None of these

Explanation:


9. A triangular section in open channel flow will be most economical when the vertex angle at the triangle base point is ?

30 degree

50 degree

20 degree

None of these

Answer: None of these

Explanation:


10. The value of coefficient of velocity depends upon ?

slope of orifice

size of orifice

head of liquid above orifice

friction at the orifice surface

Answer: friction at the orifice surface

Explanation: