agriculture MCQs – Page 202

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 Review each marked answer and report any item that may be outdated or unclear.

4021. when ever a sloping face of river bank is protected by stone pitching against scour, the pitching is extended beyond the toe to the river side that is called__________________?
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A. Guide bank

B. Launching apron

C. Toe wall

D. Protective wall

4022. 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. Non-gravity structure

B. Aqueduct

C. Cross-Drainage

D. Syphon-aqueduct

4023. A structure constructed in channel width having narrow throat and raised floor in bottom, used for measuring discharge is called _____________________?
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A. Venturimeter

B. regulator

C. Cippoletti weir

D. Venturiflume
4024. 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. Aggrading

B. Silting & scouring

C. Meandering

D. Degrading

4025. Velocity of flow in a sewer must be form ______________ to ?
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A. 1 m / sec to 3m/ sec

B. 4.5 ml sec to 5 m/ sec

C. 4m / sec to 4.5 ml sec

D. 3m / sec to 4m/ sec

4026. The ratio between the force causing a body to slide along a plane and the force normal to the plane is called __________________?
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A. Coefficient of friction

B. All are correct

C. Coefficient of internal friction

D. Coefficient of resistance

4027. 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. 200 mm

B. 175 mm

C. 150 mm

D. 100 mm

4028. 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. Out let

B. Module

C. Inlet

D. Exit

4029. The losses of irrigation water due to the seepage but That. does not join the under ground reservoir is called __________________?
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A. Percolation losses

B. Absorption losses

C. Seepage losses

D. Evaporation losses

4030. For strong Hydraulic jump containing maximum energy, the down stream glacis should be sloped at a slope of ______________ to dissipate max: energy?
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A. 2.5:1 to 3:1

B. 2:1 to 2.5:1

C. 3:1 to 5:1

D. 5:1 to 6

4031. A water flow available in the drains without irrigation season i.e.flow of sanitary sewage is called____________________?
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A. Municipal flow

B. Surface flow

C. Waste water flow

D. Dry weather flow
4032. Theoretical velocity of the jet at Vena Contracta is determined by ________________?
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A. 2gh

B. 2(gh)1/2

C. 2g (h)1/2

D. (2 gh)1/2
4033. A mine or tunnel for collecting seepage water in rock or dam is called ____________________?
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A. Water tunnel

B. Seepage tunnel

C. Seepage Drain

D. Seepage gallery
4034. Bouyant force is equal to the ___________ of liquid displaced by the body in water mass?
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A. Specific weight

B. Volume

C. Weight

D. Specific gravity

4035. When FSL of the canal is sufficiently below the bottom of the drain, so that water flows freely under gravity, such structures is called_____________________?
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A. Syphon Aqueduct

B. Canal-syphon

C. Super-passage

D. Syphon

4036. When the rate of change of discharge of outlet equals the rate of change of discharge of the channel, the out let is called __________________?
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A. Non-flexible

B. Flexible

C. Proportional

D. Sensitive

4037. The maximum rate at which the soil in given condition can absorb water is called ___________________?
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A. Field Capacity

B. Infiltration capacity

C. Capillarity

D. All are correct

4038. A structure provided when a large canal a big drainage channel approach other practically at the same level is called__________________?
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A. Level crossing

B. Canal crossing

C. Drainage crossing

D. Super passage

4039. According to Chezys formula, the discharge through an open channel is equal to _________________?
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A. Ac?R.S

B. A (c.A/pi) <sup>1/2 </sup>

C. C (mi) <sup>1/2 </sup>

D. A (cmi)<sup>1/2 </sup>

4040. Total energy line (T.E.L) represents the sum of ________________________?
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A. Velocity head + potential head + datum head

B. Pressure head + kinetic head and datum head

C. Velocity head + kinetic head + datum head

D. The energy head + potential head + datum head