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All Free Agriculture MCQs with Answers

Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.

2,315 questions · page 55 of 116

1081. The water evaporates from paddy surfaces to the atmosphere in the form of water vapours, these water vapours get collected in the atmosphere and behave & like_________________?

  • A. Water
  • B. Snow
  • C. Ice particles
  • D. Gas

Explanation: Water evaporated from a paddy enters the atmosphere as water vapour, which is water in its gaseous state.

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Correct answer: Gas

1082. When the air in a atmosphere is fully saturated with the vapours present in it, then the pressure exerted by such wet air mass will be called ____________________?

  • A. Saturation pressure
  • B. Vapour pressure
  • C. Partial pressure
  • D. Atmospheric pressure

Explanation: When air is saturated, the water vapour exerts its maximum pressure at that temperature, called saturation vapour pressure.

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Correct answer: Saturation pressure

1083. The amount of moisture content present in the air, when it is expressed as weight per unit volume is called ________________?

  • A. Humidity
  • B. Absolute Humidity
  • C. relative humidity
  • D. All are correct

Explanation: Absolute humidity is the actual mass of water vapour present per unit volume of air, commonly expressed in grams per cubic metre.

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Correct answer: Absolute Humidity

1084. A cloud is formed due to condensation. it consists of a small particle of ice an. small droplets of water, having diameter about ___________microns?

  • A. 30
  • B. 35
  • C. 40
  • D. 45

Explanation: Cloud droplets are extremely small, commonly around 40 microns in diameter, although their size varies with cloud type and conditions.

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Correct answer: 40

1085. The percentage of culturable commended area, irrigated during the year to the total culturable commanded area on a outlet or channel is called___________________?

  • A. Total irrigable Area
  • B. Gross commended area
  • C. Culturable Commended area
  • D. Annual Intensity

Explanation: Annual intensity measures how much of the total culturable commanded area receives irrigation during a year, expressed as a percentage.

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Correct answer: Annual Intensity

1086. Hydraulic structures are designed for a safe flow of flood. The floods which are equal in designed magnitude life of the project is called _____________________?

  • A. Probable flood
  • B. Ordinary floods
  • C. Low floods
  • D. High floods

Explanation: A probable flood is the flood magnitude selected for hydraulic design in relation to the project's service life and safety requirements.

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Correct answer: Probable flood

1087. A particular flood which can occur in the basin in the worst meteorological and hydrological conditions is called ___________________?

  • A. Standard flood
  • B. Maximum probable flood
  • C. Very high flood
  • D. Storm water flood

Explanation: The maximum probable flood is the greatest flood expected from the most severe reasonable combination of meteorological and hydrological…

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Correct answer: Maximum probable flood

1088. If a river or stream is collecting sediment and is building up dunes in its bed is called ______________________?

  • A. Stable river
  • B. Sub-stable river
  • C. Sediment river
  • D. Aggrading river

Explanation: An aggrading river gains sediment, causing its bed to rise and often forming dunes or other deposits.

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Correct answer: Aggrading river

1089. A river before its joins the sea, gets divided into small channels, thus forming a Triangular shape called __________________?

  • A. Deltaic river
  • B. Unstable river
  • C. Stable river
  • D. Degrading river

Explanation: A river that divides into distributary channels near its mouth and builds a roughly triangular depositional landform is associated with a…

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Correct answer: Deltaic river

1090. In a river the flood water dries up before it joins the sea or any other river, such river is called ________________?

  • A. Flashy
  • B. Virgin
  • C. Tidal
  • D. Deltaic

Explanation: A virgin river loses its flow inland before reaching the sea or another river, usually because of seepage, evaporation, or insufficient…

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Correct answer: Virgin

1091. 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__________________?

  • A. Toe wall
  • B. Protective wall
  • C. Launching apron
  • D. Guide bank

Explanation: A launching apron is a layer of stone placed beyond the bank toe so that, if scour removes supporting bed material, the stones settle and…

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Correct answer: Launching apron

1092. The groyne pointing upwards direction of flow is called ______________________?

  • A. Repelling
  • B. Attracting
  • C. Impermeable
  • D. Permeable

Explanation: A repelling groyne points upstream and deflects the current away from the protected bank.

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Correct answer: Repelling

1093. The rise in river water level at up stream due to construction of weir is called__________________?

  • A. Pond level
  • B. Afflux
  • C. HFL
  • D. FSL

Explanation: Afflux is the rise in the upstream river water level caused by an obstruction such as a weir or bridge.

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Correct answer: Afflux

1094. Silt free water should be supplied to the canals through______________________?

  • A. Under sluices
  • B. Scouring sluices
  • C. Head sluices
  • D. Sluice gates

Explanation: Head sluices or the canal head regulator control the entry of relatively silt-free water into the canal from the upper water layers.

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Correct answer: Head sluices

1095. The wall of masonry or concrete, constructed at 90° to the axis of weir to separate normal weir from under sluices is called____________________?

  • A. All are correct
  • B. Retaining wall
  • C. Toe wall
  • D. Divide wall

Explanation: A divide wall is built at right angles to the weir axis to separate the normal weir bays from the under-sluice or undersluice portion.

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Correct answer: Divide wall

1096. In high floods, to avoid spilling of flood water over the gates, a wall is provided from pond level to high Flood level. This wall spans for the entire length of regulator, rest on piers, sustain water pressure by its weight called_____________________?

  • A. Retaining wall
  • B. Breast wall
  • C. Divide wall
  • D. Cantilever wall

Explanation: A breast wall is the heavy wall carried on the regulator piers from pond level to high flood level, preventing floodwater from spilling…

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Correct answer: Breast wall

1097. The structures, which are constructed on the river bed upstream of head regulator. With this clear water enters in canal such structures are called______________________?

  • A. Vortex pipes
  • B. Silt ejectors
  • C. Silt excluders
  • D. Silt control structures

Explanation: Silt excluders are placed upstream of a canal head regulator to guide sediment-laden bottom water away, allowing clearer upper water to…

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Correct answer: Silt excluders

1098. 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_______________?

  • A. Afflux
  • B. Final depth
  • C. Down stream water depth
  • D. Sequent depth

Explanation: In a hydraulic jump, the shallow incoming depth is the initial depth and the greater depth after the jump is the sequent depth.

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Correct answer: Sequent depth

1099. Mostly the hydraulic structures founded on ____________ soils fails because of undermining and uplift pressure?

  • A. Permeable
  • B. Rocky
  • C. Impermeable
  • D. Stable

Explanation: Permeable foundation soils allow seepage beneath a hydraulic structure, producing uplift pressure and piping or undermining at the…

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Correct answer: Permeable

1100. 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______________?

  • A. Submerged exit gradient
  • B. Balanced exit gradient
  • C. Critical exit gradient
  • D. All are correct

Explanation: The critical exit gradient is reached when the upward seepage force equals the submerged weight of the soil particles, making the soil…

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Correct answer: Critical exit gradient
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