agriculture MCQs – Page 39

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 Review each marked answer and report any item that may be outdated or unclear.

761. The centre of pressure of a plane submerged area which holds it in equilibrium is ____________________?
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A. Always below the centre of gravity of the area

B. Independent of the inclination of area

C. Always above the centroid of the area

D. Coincident with centroid of area if its plane is vertical

762. To avoid scouring from end of structure, it is necessary to provide a ________________ at the exit point?
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A. Stone boom

B. Stone blocks

C. Stone apron

D. Vertical cutoff
763. Plants which grow on dry region are____________________?
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A. Thermophytes

B. Hydrophytes

C. Xerophytes

D. Haplophytes

764. 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. High floods

B. Probable flood

C. Ordinary floods

D. Low floods

765. A graph which shows the volume of a reservoir or tank at any given water level is called ____________________?
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A. Capacity curve

B. Mass curve

C. All are correct

D. Volume curve

766. The invented filter is provided just after the end of concrete floor to reduce () possibility of _________________?
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A. Under mining

B. Piping

C. a and b are correct

D. Up thrust

767. The counter berm for a canal is provided so as to contain the saturation gradient line _____________ the bank?
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A. Out of

B. Above

C. Below

D. Within
768. In ogee spillway the discharge is directly proportional to _______________________?
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A. H3/2

B. H1/3

C. H1/2

D. H1/4

769. Gassypium arborium is__________________?
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A. Tetraploid

B. Haploid

C. Diploid

D. Triploid

770. The ratio of actual cultivated area to a total farm area over a year is called__________________?
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A. Cropping pattern

B. None of the above

C. Cropping intensity

D. Cost-benefit ratio

771. The rise in river water level at up stream due to construction of weir is called__________________?
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A. FSL

B. Afflux

C. Pond level

D. HFL

772. Land containing high percentage of alkalies may be reclaimed by addition of_____________________?
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A. Caco3

B. Chemicals

C. Gypsum

D. Caso4
773. Allclopatluc interactions in general and the allelochemicals in particular are viewed as an important tool for_______________?
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A. Disease and pest management

B. non of these

C. Weed and pest management

D. Pest and insect management

774. The total dry matter produced by a plant as a result of photosynthesis is called_________________?
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A. Biological yield

B. Dry matter

C. Harvest index

D. Crop growth

775. A hydraulic jump to dissipate energy when flow is __________________?
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A. Shooting flow

B. Turbulent flow

C. Critical flow

D. Streaming flow
776. An impermeable Formation which neither contains water nor transmits water may be called_____________________?
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A. Aquiclude

B. Aquifer

C. Aquifuge

D. Confined-aquifer

777. The science of water which deals with the depletion and replenishment of water resources is called_________________?
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A. Biology

B. Histology

C. Hydrography

D. Hydrology
778. The method of irrigation in which each tree is surrounded by a border to form a pool when water is supplied is called ________________?
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A. Furrow irrigation

B. Border irrigation

C. Basin irrigation

D. Check irrigation

779. The ratio between the actual pressure and saturation vapour present at same temperature is called___________________?
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A. Relative Humidity

B. High Humidity

C. Low humidity

D. Absolute Humidity

780. If the duration of a unit hydrograph approaches zero, the resulting unit hydrograph is called __________________?
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A. Instantaneous unit hydrograph

B. Unit hydrograph

C. Intensity unit hydrograph

D. Unit hyetgoraph