Irrigation Engineering MCQ Questions & Answers

71

To determine the discharge at a section in a stream from its rating curve, the required data are
i) slope of water surface at the section
ii) stage at the section
iii) current meter readings at the section
The correct answer is

A) (i) and (ii) B) (ii) and (iii) C) only (ii) D) only (iii)

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Answer & Solution

Answer: Option C

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72

Variability of rainfall is
i) largest in regions of high rainfall
ii) largest in coastal areas
iii) largest in regions of scanty rainfall
The correct answer is

A) only (i) B) (i) and (ii) C) only (iii) D) (ii) and (iii)

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Answer & Solution

Answer: Option C

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73

Interception losses are due to
i) evaporation
ii) transpiration
iii) stream flow
The correct answer is

A) Only (i) B) (i) and (ii) C) (ii) and (iii) D) (i), (ii) and (iii)

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Answer & Solution

Answer: Option A

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74

The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are
i) Water pressure
ii) Self weight
iii) Uplift
iv) Pressure due to earthquake
The correct answer is

A) Only (ii) B) (i), (ii) and (iii) C) (i), (ii) and (iv) D) (i), (ii), (iii) and (iv)

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Answer & Solution

Answer: Option A

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75

If straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the area of its cross-section, is

A) R (θ + tan θ) B) R (θ + cot θ) C) R2 (θ + tan θ) D) R2 (θ + cot θ)

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Answer & Solution

Answer: Option D

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76

If D₁ and D₂ are depths of water upstream and downstream of a hydraulic jump, the loss of head at the jump, is

A) $$\frac{{{{\left( {{{\text{D}}_2} - {{\text{D}}_1}} \right)}^3}}}{{{{\text{D}}_1}{{\text{D}}_2}}}$$ B) $$\frac{{{{\left( {{{\text{D}}_2} - {{\text{D}}_1}} \right)}^3}}}{{2{{\text{D}}_1}{{\text{D}}_2}}}$$ C) $$\frac{{{{\left( {{{\text{D}}_2} - {{\text{D}}_1}} \right)}^3}}}{{3{{\text{D}}_1}{{\text{D}}_2}}}$$ D) $$\frac{{{{\left( {{{\text{D}}_2} - {{\text{D}}_1}} \right)}^3}}}{{4{{\text{D}}_1}{{\text{D}}_2}}}$$

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Answer & Solution

Answer: Option D

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77

For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

A) Bligh's theory B) Electrical analogy method C) The relaxation method D) Khosla's method of independent variables

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Answer & Solution

Answer: Option D

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78

The main function of a divide wall is to

A) control the silt entry in the canal B) prevent river floods from entering the canal C) separate the undersluices from weir proper D) provide smooth flow at sufficiently low velocity

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Answer & Solution

Answer: Option C

Solution:

The main function of a divide wall is to separate the undersluices from the weir proper and provide a smooth flow of water by guiding it efficiently.

It helps in:

- Preventing crosscurrents and turbulence that may interfere with the proper functioning of the undersluices.

- Controlling sedimentation by ensuring that silt-laden water flows towards the undersluices for easy disposal.

- Protecting the structural integrity of the weir by minimizing the impact of high-velocity flows.

79

Disposal of extra excavated earth of canals, is utilized to provide a spoil bank on

A) Left side B) Right side C) Both sides D) All the above

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Answer & Solution

Answer: Option D

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80

The duty is largest

A) at the head of water course B) on the field C) at the head of a main canal D) same at all places

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Answer & Solution

Answer: Option B

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Irrigation Engineering MCQ Questions & Answers | Civil Engineering