**651. A flow in which the quantity of liquid flowing per second is constant is called___________________?**

A. Uniform flow**B. Steady flow**

C. Turbulent flow

D. None of these

**652. A flow in which the stream lines may be represented by a straight line is called____________________?**

A. Non-uniform flow

B. un-steady flow

C. steady flow**D. one-dimension flow**

**653. Theoretical velocity of the jet at Vena Contracta is determined by ________________?**

**A. (2 gh)1/2**

B. 2(gh)1/2

C. 2g (h)1/2

D. 2gh

**654. The loss of head due to friction according to Darcy’s formula is _____________________?**

A. 4fLv2/gd**B. 4fLv2/2gd**

C. 4fLv/gd

D. 4fLv/2gd

**655. The hydraulic mean depth for a circular pipe of diameter d is ____________________?**

A. d/2

B. d/3**C. d/4**

D. d/6

**656. According to Chezy’s formula, the discharge through an open channel is equal to _________________?**

A. C (mi) ^{1/2}

B. A (cmi)^{1/2}**C. Ac√R.S**

D. A (c.A/pi) ^{1/2}

**657. The discharge through a rectangular channel will be maximum. if its depth is_______________?**

A. Twice the width

B. Equal to its width**C. Half of its width**

D. one-third of its with

**658. The depth of water in a channel, corresponding to minimum specific energy is called ________________?**

A. Normal depth**B. Critical depth**

C. Full supply depth

D. None of these**The water force per meter length on a vertical wall is 659. equal to_________________?**

A. w H

B. W.H/2**C. WH2 2**

D. wh2

**660. When ever a body is immersed wholly or partially in water, it is lifted up by a force equal to the weight of water displaced by the body ?**

**A. Archimed’s Principle**

B. Law of gravity

C. Newton’s law of otion

D. None of these