agriculture MCQs – Page 38

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 Review each marked answer and report any item that may be outdated or unclear.

741. In the initial stage of rainfall, when soil moisture available in the root zone is very low, the rate of infiltration ?
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A. Normal

B. Reduces

C. remain stagnant

D. Increases
742. In alluvial river due to the action of centrifugal force, bends are developed by scouring on concave and silting on convex _____________________?
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A. Meandering

B. Silting & scouring

C. Degrading

D. Aggrading

743. Seeds which dried at low moisture contents and stored at low temperature without loosing their viability are________________?
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A. Active seeds

B. Certified seeds

C. Orthodox seeds

D. Recalcitrant seeds

744. A curve showing the maximum flow in the river and mean time reduces flow. we be called___________________?
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A. All are correct

B. Infiltration capacity curve

C. Infiltration capacity

D. Ground water depletion curve
745. Soil water in excess of hygroscopic and capillary water which moves downward through the soil by the force of gravity is called______________?
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A. sub-surface water

B. Run off water

C. Capillary water

D. Gravitational water
746. 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. High flood level

B. Hydraulic design condition

C. Worst condition

D. Dangerous condition

747. The amount of moisture content present in the air, when it is expressed as weight per unit volume is called ________________?
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A. Absolute Humidity

B. Humidity

C. All are correct

D. relative humidity

748. Allelopathy is an important component in the development of future integrated strategies for____________?
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A. Soil management

B. Water management

C. non of these

D. Weed management
749. The unit of volume of water used in irrigation practice in FPS system is Acre-Foot. there fore one Acre- Foot is equal to ___________________?
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A. 41560ft3

B. 43560 cubic feet

C. 42560ft3

D. 40560ft3

750. Root rot of cotton is a_________________?
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A. Fungal disease

B. Bacterial disease

C. Viral disease

751. Khosla provided a seepage theory for design of Hydraulic structures called________________?
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A. Creep theory

B. Method of independent variables

C. Method of cutoffs

D. Theory of seepage

752. In China, cotton was cultivated as a crop in._______________?
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A. 4th century AD

B. 7<sup>th</sup> century AD

C. 10<sup>th</sup> century AD

D. 5<sup>th</sup> century AD

753. Friction head loss in open channels is determined by_________________?
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A. Darcy weisbach equation

B. Pilot tube

C. Chezys formula

D. Kutters formula

754. The depth before the jump is always less then the depth after the jump. The depth before the jump is called initial depth and depth after the jump is called_______________?
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A. Sequent depth

B. Afflux

C. Down stream water depth

D. Final depth

755. Cotton ginning machine was invented by_______________?
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A. William Black

B. Thomas Hough ten

C. Withey

D. Thomas Wilson

756. A water rise takes place on down stream of sloping glacis, when a stream of water moving with high velocity and low depth strikes another stream of flow moving with low velocity and high depth, such breakage in water surface is called______________?
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A. Hydraulic jump

B. Afflux

C. Water tide

D. Water wave

757. 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. Total irrigable Area

B. Gross commended area

C. Culturable Commended area

D. Annual Intensity
758. The value of coefficient of discharge in comparison to cofficient of velocity is found to be ____________________?
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A. Equal

B. Zero

C. More

D. Lesser
759. An open cut in the canal bank. with bed and sides to escape canal water through a lead channel to mix water in a nearby drain is called _____________________?
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A. Inlet

B. Out let

C. Exit

D. Module

760. A digging out of earth to make trench for any engineering purpose is called ______________________?
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A. borrow pitting

B. Excavation

C. Earth filling

D. Cavitations