agriculture MCQs – Page 201

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 Review each marked answer and report any item that may be outdated or unclear.

4001. If E1 is the energy before the hydraulic jump and E2 is the energy after the hydraulic jump the efficiency of jump is then given by _____________________?
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A. E1 / E2

B. E2 / E1

C. E2 E1

D. E1 E2

4002. Onion is a ___________ rooted crop?
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A. Deep

B. Non-rooted

C. Shallow

D. Spread

4003. The water way from a weir is determined by using Laceys wetted perimeter i.e. P=_______(Q)1/2 ?
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A. 5.75

B. 4.75

C. 3.5

D. 3.75

4004. An open cut given in a canal bank, suitably protected by stone pitching to the upland drainage water into the canal is called ___________________?
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A. Out let

B. entrance

C. Mixing

D. Inlet
4005. 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 hyetgoraph

C. Intensity unit hydrograph

D. Unit hydrograph

4006. When FSL of the canal is sufficiently above the bed level of drainage so that canal flows under syphonis action, the structure is called _____________________?
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A. Aqueduct

B. Canal-syphon

C. Syphon Aqueduct

D. Super passage

4007. The process to dilute the available salts from root Zone by providing simply canal water is known as __________________?
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A. de-salting

B. Leaching

C. Recultivation

D. Reclamation

4008. 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. 43560 cubic feet

B. 40560ft3

C. 42560ft3

D. 41560ft3

4009. 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. Non-modular

B. Semi-modular

C. Modular

D. Semi Rigid

4010. The season that starts from 1st April and end on 30th September and run for 183 days is called _____________________?
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A. Rice season

B. Rabi season

C. Kharif season

D. Cotton season

4011. 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. Within

C. Below

D. Above

4012. _________% of total global water is fresh and its major portion is obtained from Rains ?
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A. 2.5%

B. 3.20%

C. 2%

D. 3%

4013. At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?
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A. Critical exit gradient

B. Balanced exit gradient

C. Submerged exit gradient

D. All are correct

4014. The force with which the distinct bodies held together when their surfaces are brought in contact to each other is called _________________?
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A. Surface tension

B. Cohesion

C. All are correct

D. Adhesion
4015. The value of coefficient of discharge in comparison to cofficient of velocity is found to be ____________________?
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A. Zero

B. Equal

C. Lesser

D. More

4016. The disposal of sewage by allowing it to flow and Soak into specially leveled farm land for cultivation purpose is called _____________________?
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A. Trickle irrigation

B. Check irrigation

C. Border irrigation

D. Broad irrigation
4017. When a weir is constructed, the downstream .bed of the river goes on eroding and consequently causes progressive lowering of the bed on downstream of weir called__________________?
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A. Ponding on down stream

B. All are correct

C. Retrogression

D. Lowering down of bed

4018. For an economical design of gravity dam, the shear friction factor causec compression strength should lie between____________________?
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A. 3 to 5

B. 2.5 to 4.5

C. 1.5 to 4.0

D. 2.0 to 4.0

4019. To pack with clay material generally for the purpose of checking leakage of water is called __________________?
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A. Pug

B. Repair

C. Cohesive

D. Seal

4020. Land containing high percentage of alkalies may be reclaimed by addition of_____________________?
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A. Caso4

B. Caco3

C. Gypsum

D. Chemicals