Question

What is the approximate percentage of light reinforcement that is provided in the top of the reinforced concrete slabs at the base?

(a) 0.50% of the concrete area

(b) 0.45% of the concrete area

(c) 0.30% of the concrete area

(d) 0.25% of the concrete area

The question was posed to me at a job interview.

The above asked question is from Chute Spillway in chapter Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

Answer 1

The correct choice is (d) 0.25% of the concrete area

To elaborate: The base of the channel is usually made of reinforced concrete slabs 25 to 50 cm thick and light reinforcement of about 0.25% of the concrete area is also provided in both the directions. The chute is sometimes narrowed for the economy and then widened near the end to reduce the discharging velocity.