Test: Spillways - 2 - Civil Engineering (CE) MCQ

a roller bucket

a ski-jump bucket

a sloping apron taken below the downstream river bed

None of the above

< 0.720

= 0.720

> 0.720

fluctuating

0.5 and 1.85

0.85 and 2.0

2.0 and 0.85

2.0 and 1.5

a ski-jump bucket

a horizontal apron

a sloping apron

a stilling pool

45.87

34.40

22.94

11.47

about 80% of the energy is dissipated through interaction of the jet with the surrounding air

about 80% of the energy is impartedtp the channel bed downstream .of the spillway

practically no energy is imparted to the downstream bed

50% of the energy is lost in the roller action in the bucke

to design efficient side walls and Energy dissipators 

to design vibration free crest gates

to know the coefficient of discharge of the spillway 

to determine the roughness charac-teristies of the spillway

stoneygate

sliding gate

fixed wheel gate

taintergate

lies above jump rating curve at all discharges

coincides with the jump rating curve at all discharges

lies below jump rating curve at all discharges

lies either above or below the jump rating curve depending upon discharge

is greater than 1.1 times the required conjugate depth for the formation of hydraulic jump; and the river bed rock is ‘good’

depth is lesser than the depth required for the jump formation; and the bed of the river channel is com posed of ‘sound' rock

depth is equal to the depth required for the jump formation, and the river bed rock is ’good’

depth is 1.3 times the required for the jump formation and the river bed is composed of ‘weak’ rock