Hydraulics Objective Questions and Answers

407. For steady flow in open channels, which one of the following does not change :

408. The flow in open channel is said to be subcritical if the Froude number is

A. less than 1.0

409. The flow in open channel is said to be critical if the Froude number is :

410. A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy's constant C = 54.8, pick up the correct specification of the channel from the following :

A. hydraulic mean depth = 1.5 m

B. Velocity of flow = 1.5 m/sec

C. Rate of flow = 27 m3/sec

D. All the above.

Discuss in Forum

411. For a most economical rectangular channel, the width of the channel must be

A. equal to depth of flow

B. twice the depth of flow

C. half the depth of flow

D. None of these.

Discuss in Forum

412. For a most economical rectangular channel, the hydraulic mean depth, is equal to

A. the depth of flow

B. half the depth of flow

C. one-third depth of flow

D. None of these.

Discuss in Forum

413. For a most economical trapezoidal open channel, the half of the top width must be equal to

Page 59 of 61

« 57 58 59 6061 »

Civil Engineering Objective Questions { Hydraulics }