agriculture MCQs – Page 204

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

4061. A fish ladder is device by which flow energy can be dissipated in such a manner as to provide easy access to the downstream fish to come on upstream side, the velocity of flow varies from___________________?
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A. 3.5 4.0 m/sec

B. 2.5 3 m/sec

C. 2.0 2.5 m/sec

D. 3.0 3.5 m/sec
4062. The flow in the river due to the floods may be classified as _____________________?
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A. Irrotational flow

B. Laminar flow

C. Stream line flow

D. Turbulent flow
4063. The down stream sloping glacis of the Hydraulic structure is made in such a way to form automatically the _____________ and dissipate the surplus energy of flowing water?
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A. Afflux

B. Pond level

C. HFL

D. Hydraulic jump
4064. When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________________?
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A. Dangerous condition

B. Worst condition

C. Hydraulic design condition

D. High flood level

4065. The significant damage to crop generally occurs when capillary meniscus reaches permanent wilting point known as _______________?
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A. Unavailable moisture

B. Equivalent moisture

C. Hygroscopic moisture

D. A and B
4066. Hydraulic structures are designed for a safe flow of flood. The floods which are equal in designed magnitude life of the project is called _____________________?
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A. Probable flood

B. Low floods

C. High floods

D. Ordinary floods

4067. The percentage of culturable commended area, irrigated during the year to the total culturable commanded area on a outlet or channel is called___________________?
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A. Culturable Commended area

B. Annual Intensity

C. Gross commended area

D. Total irrigable Area

4068. According to Mr. Khosla, the seeping water creates undermining and the undermining starts from__________________?
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A. Bottom to top

B. Up stream to down stream

C. Down stream to up stream

D. Top to bottom

4069. In ogee spillway the discharge is directly proportional to _______________________?
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A. H1/4

B. H3/2

C. H1/2

D. H1/3

4070. The discharge through rectangular channel is maximum when Hydraulic mean depth m is equal to ______________?
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A. depth/ 4

B. depth/ 3

C. 2 / 3 depth

D. depth/ 2
4071. The delta the total water depth required by a crop up to its maturity the delta of wheat is _____________________?
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A. 50cm

B. 30cm

C. 40 cm

D. 60cm

4072. After rainfall the quantity of water that flows directly over the ground surface and join immediately to the river is called_________________?
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A. Sub-surface runoff

B. Base flow

C. True surface runoff

D. Surface runoff

4073. The under sluices in a weir are provided, at the level of upstream floor dispose off the sediment deposited on downstream is called______________________?
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A. Sluice gates

B. Under sluices

C. Head sluices

D. Scouring sluices
4074. the ratio between the rate of change of discharge of the out let to the rate of change of discharge of the distributary is called ______________________?
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A. flexibility

B. Flow abili

C. Proportionally

D. Sensitivity

4075. The inverted filter consists layer of materials of increasing ______________ from bottom to top?
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A. Piping

B. Up thrust pressure

C. Permeability

D. Under mining

4076. When the fluid properties do not change with time, it is a ___________ flow?
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A. Non-Uniform

B. Unsteady

C. Uniform

D. Steady
4077. If in a river the flood rises and falls suddenly due to storm rain, then such river is called __________________?
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A. Virgin

B. Flashy

C. Deltaic

D. Tidal

4078. During the peak stage of river, there exist an out flow from river into the ground water reservoir, in such case river will be called _________________?
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A. Influent stream

B. Seepage stream

C. Storm water stream

D. Effluent stream
4079. The depth of water in a channel, corresponding to minimum specific energy is called ________________?
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A. Critical depth

B. None of these

C. Normal depth

D. Full supply depth

4080. The groyne pointing upwards direction of flow is called ______________________?
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A. Repelling

B. Attracting

C. Permeable

D. Impermeable