G₁ and G₂ are the slopes of the approach and departure grades of a vertical curve, respectively.

Given |G₁| < |G₂| and |G₁| ≠ |G₂| ≠ 0

Statement 1 : +G₁ followed by +G₂ results in a sag vertical curve.

Statement 2 : −G₁ followed by −G₂ results in a sag vertical curve.

Statement 3 : +G₁ followed by −G₂ results in a crest vertical curve.

Which option amongst the following is true?

A hydraulic jump takes place in a 6 in wide rectangular channel at a point where the upstream depth is 0.5 m (just before the jump). If the discharge in the channel is 30 m³/s and the energy loss in the jump is 1.6 m, then the Froude number computed at the end of the jump is _________. (round off to two decimal places)

(Consider the acceleration due to gravity as 10 m/s².)

Water is flowing in a horizontal, frictionless, rectangular channel. A smooth hump is built on the channel floor at a section and its height is gradually increased to reach choked condition in the channel. The depth of water at this section is y₂ and that at its upstream section is y₁. The correct statements for the chocked and un-chocked conditions in the channel is/are