agriculture MCQs – Page 40

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 Review each marked answer and report any item that may be outdated or unclear.

781. A water pool is designed on the down stream of the hydraulic structure to dissipate the energy of falling water by providing a water cushion called ______________________?
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A. Down stream pond

B. Water pool

C. Water cushion

D. Cistern
782. A unit hydrograph is a hydrograph of runoff produced by a rainstorm of a specified duration called ____________________?
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A. Storm runoff

B. Unit duration

C. Base flow

D. Peak runoff

783. A flow in which the stream lines may be represented by a straight line is called____________________?
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A. Non-uniform flow

B. steady flow

C. one-dimension flow

D. un-steady flow

784. The discharge through a rectangular channel will be maximum. if its depth is_______________?
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A. Twice the width

B. Equal to its width

C. one-third of its with

D. Half of its width
785. The water in swimming pools can be ____________ by using any one from the following, chlorine-ultraviolet rays and bromine t ?
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A. Cleaned

B. Infected

C. Disinfected

D. Iodized

786. The Indus plain is the main agricultural producing region in the country which receives about________________m m of rain fall annually?
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A. 175 mm

B. 100 mm

C. 200 mm

D. 150 mm
787. Optimum pH for cotton plant lies between______________?
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A. non of these

B. 5.2 to 7.0

C. 3.5 to 5.5

D. 5.2 to 9.0

788. A module or outlet in which discharge is fixed and limited, irrespective fluctuations in water levels in distributary is called _________________?
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A. Semi-modular

B. Modular

C. Non-modular

D. Semi Rigid

789. Pilot tube is a device, which convert velocity head of flowing water into pressure by ____________________?
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A. H = v2 / g

B. H = v/g

C. H = v2/2g

D. H = v2 / g2

790. Pulling of off- type plants from a cropped field is called___________________?
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A. Pruning

B. None of the above

C. Rouging

D. Weeding

791. A spoil bank is formed when the volume of excavated soil is _________________ of embankment filling?
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A. Excess

B. Not required

C. Equal to

D. Less than

792. When the high flood level of the drain is sufficiently below the bed of the Canal that the drainage water flows freely under gravity, such structure is called___________________?
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A. Cross-Drainage

B. Syphon-aqueduct

C. Aqueduct

D. Non-gravity structure

793. Mostly the salt of calcium and Magnesium can not cause ________________?
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A. Salinity

B. Turbidity

C. Alkalinity

D. Poisoning
794. A river before its joins the sea, gets divided into small channels, thus forming a Triangular shape called __________________?
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A. Degrading river

B. Deltaic river

C. Unstable river

D. Stable river

795. 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. Base flow

B. Surface runoff

C. Sub-surface runoff

D. True surface runoff
796. The water particles held in soil pores of root zone by _____________ against gravity and is known as capillary water?
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A. Gravity force

B. Cohesive force

C. Tension force

D. Capillary force
797. Cotton is a crop of_______________?
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A. Tropical region

B. Sub-tropical region

C. Both A and B
798. Darcy formula for loss of head in pipes is given by, hf=4fl v2 / __________________?
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A. gd

B. g2d

C. 2gd

D. gd2

799. The experiment of capillary rise is performed in a glass tube of smaller diameter, because___________________?
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A. It is easily visible

B. Glass tube is lighter than metallic tube

C. Capillary rise is significant

D. Glass tube is cheaper than metal

800. If the weir flood is designed continuous with divide piers as reinforced structure,such that the weight of divide piers, keep the structure safe against uplift, is called__________________?
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A. Non-gravity weir

B. Rectangular weir

C. Gravity weir

D. Sharp crested weir