GATE ES Environmental Hydraulics PYQs & Answers

Questions 1–10 of 21. Imported answers require independent review unless marked reviewed.

Consider the following statements regarding the pressure measured at a point in a fluid.

S1: Absolute pressure is gauge pressure plus atmospheric pressure.

S2: Gauge pressure is measured by considering absolute zero pressure as datum.

S3: Absolute pressure is measured by considering atmospheric pressure as datum.

S4: Vacuum pressure is negative pressure obtained by subtracting absolute pressure from atmospheric pressure.

Which ONE of the following options lists all the TRUE statements?

Your answerChoose one option.

S1 and S2

S2 and S3

S1 and S4

S1, S2, and S4

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Water is flowing at the rate of 15 m

/s through a rectangular channel of 5 m width. If the acceleration due to gravity (g) is 9.81 m/s

, the critical velocity for the flow is ______m/s (rounded off to three decimal places).

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A cylindrical roller gate of diameter 6.0 m and length 10.0 m is placed on a dam to store water behind it, as shown in figure. The magnitude of the resultant force due to water acting on that gate when the water is about to spill is ______ × 10⁶ N (rounded off to two decimal places). Consider acceleration due to gravity (g) = 9.81 m/s²; density of water (ρ) = 1000 kg/m³; and π = 3.14.

Diagram for Environmental Science and Engineering question 55

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For a gradually varied flow, consider the following statements

in M

surface profile

in S

surface profile

where,

is normal depth,

is critical depth, and

is flow depth.

Choose the correct option from the following

Your answerChoose one option.

P is TRUE; Q is TRUE

P is TRUE; Q is FALSE

P is FALSE; Q is TRUE

P is FALSE; Q is FALSE

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A pipe line O P Q R branches into three pipes X, Y, and Z between points P and Q as shown in figure (not to scale)

Diameter (d) and length (l) of each pipe are as presented in figure and all pipes are of same material having friction factor (f) of 0.02. Assume acceleration due to gravity (g) as 10.0 m/s². If the head difference between P and Q is 10 m, then the head loss between Q and R is ____________ m. (rounded off to two decimal places)

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In the context of fluid flow, which of the following statement(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

Streamline is a line, tangent to which at any point gives the direction of the velocity vector

Streakline is the actual path traversed by a given fluid particle in an unsteady flow

Steady flow and streamline are same for a steady flow

Pathline and streamline are same for a steady flow

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In a rectangular open channel, the flow is critical, and the flow depth is 2 m. Select the correct state(s)

Your answerSelect all correct options. You can choose more than one.

Specific energy for the flow is 3.0 m

Specific energy for the flow is 2.0 m

Froude number is 1.0

Froude number is 1.5

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Water is flowing FULL through a rectangular tunnel of size 3 m (width) × 2 m (height). The average velocity of flow is 1 m/s. The frictional head loss is observed to be 1 m per km. Consider acceleration due to gravity (g) as 10 m/s². The correct statement(s) is/are

Your answerSelect all correct options. You can choose more than one.

Hydraulic radius is 0.6 m

Darcy-Weisbach friction factor is 0.048

Hydraulic radius is 2 m

Darcy-Weisbach friction factor is 0.024

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With reference to the gate shown in the figure, the gate will start opening automatically when the water level ‘h’ above the hinge is ______ m (rounded off to 2 decimal places).

Diagram for Environmental Science and Engineering question 56

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The critical depth in a 2 m wide rectangular channel carry a discharge of 10 m³/s and take value of acceleration due to gravity (g) as 9.81 m/s² is ____________(in m, rounded off to two decimal places).

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GATE ES Environmental Hydraulics PYQs

How to practice Environmental Hydraulics

Question 19

Question 35

Question 55

Question 17

Question 55

Question 26

Question 27

Question 47

Question 56

Question 31