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 63 of 116
- A. Darcy's law
- B. Archimed's principle
- C. Permeability law
- D. Thiem's law
Explanation: Darcy’s law states that seepage discharge increases with hydraulic-head loss and flow area, but decreases as the length of the soil sample…
Correct answer: Darcy's law- A. Gradient
- B. Contour gradient
- C. Contour line
- D. Counter interval
Explanation: A contour gradient is a line laid out between points having a specified and constant slope, usually by using contour information.
Correct answer: Contour gradient- A. Chartered Engineer
- B. Irrigation Engineer
- C. Consulting Engineer
- D. All are correct
Explanation: A consulting engineer is engaged by a client to investigate, design or advise on structures such as dams, barrages and regulators.
Correct answer: Consulting Engineer- A. Shear friction factor Is less than 1.5
- B. Resultant of all forces cuts the base at the inner middle third point
- C. Ratio of over turning moments exceeds than unity
- D. Resultant of all forces cuts the base of the dam out side the toe
Explanation: Sliding becomes unsafe when the factor of safety against sliding falls below the prescribed value, commonly 1.5 for a gravity dam.
Correct answer: Shear friction factor Is less than 1.5- A. 120cm
- B. 100cm
- C. 80cm
- D. 70cm
Explanation: Delta is the total depth of irrigation water required by a crop during its entire crop period, from sowing to harvest.
Correct answer: 120cm- A. 100cm
- B. 120cm
- C. 80cm
- D. 75cm
Explanation: For rice, the conventional delta, or total depth of water consumed from the first watering until maturity, is approximately 120 cm.
Correct answer: 120cm- A. Delta
- B. Critical velocity
- C. Cutoff
- D. Turbulence
Explanation: Meandering can narrow the neck between two bends until the river cuts through it, forming a cutoff and often leaving an oxbow lake.
Correct answer: Cutoff- A. Have drainage facility
- B. Give additional anchorage against sliding
- C. Provide water into branch canals
- D. improve strength of lining
Explanation: Weep holes allow water trapped behind canal lining to escape, reducing pore-water pressure and preventing damage to the lining.
Correct answer: Have drainage facility- A. Mango
- B. Banana
- C. Dates
- D. Orange
Explanation: Banana is commonly recommended for wastewater irrigation because it has a high water and nutrient demand and can tolerate relatively…
Correct answer: Banana- A. Within the middle third of base
- B. At the heel
- C. At the toe
- D. At centre of base
Explanation: When the reservoir is full, hydrostatic pressure shifts the resultant toward the downstream side, increasing the compressive stress at the…
Correct answer: At the toe- A. Irrigates only on one side
- B. Is most suitable in hilly areas
- C. Is generally aligned parallel to the contour of the area
- D. Avoids the cross drainage works
Explanation: A watershed canal follows the watershed divide, so drainage water does not normally cross the canal and costly cross-drainage works are…
Correct answer: Avoids the cross drainage works- A. Critical depth
- B. Sub-critical flow
- C. Non-critical flow
- D. Shooting flow
Explanation: When flow depth exceeds critical depth, the Froude number is below one and the flow is sub-critical, meaning disturbances can travel…
Correct answer: Sub-critical flow- A. Bottom width of channel
- B. Depth of channel
- C. Sloping side of channel
- D. None of these
Explanation: For the most economical trapezoidal channel, the half top width equals the length of one sloping side.
Correct answer: Sloping side of channel- A. Gives max. Discharge
- B. Has minimum wetted perimeter
- C. Involves lesser excavation
- D. All of these
Explanation: With fixed area and bed slope, the most economical section has the minimum wetted perimeter, which maximizes hydraulic radius and…
Correct answer: All of these1255. The total energy line lies over the hydraulic gradient line by an amount equal to________________?
- A. v2/2g
- B. v2/g
- C. v/2g
- D. v/g
Explanation: The total energy line includes the velocity head in addition to the hydraulic grade line, so their vertical separation is v²/2g.
Correct answer: v2/2g- A. 2/3 cd. b (2 gh) 1/2
- B. 2/3 cd. B (2g) 1/2 H
- C. 2/3 cd. B (2g) 1/2 H3/2
- D. 2/3 cd. b (2g) 1/2 H 5/2
Explanation: For a rectangular notch, discharge is Q = 2/3 Cd b√(2g)H^(3/2), where b is notch width and H is the head over the crest.
Correct answer: 2/3 cd. B (2g) 1/2 H3/2- A. Continuity Equation
- B. Pascal s law
- C. Archimede's principle
- D. Bernoulli equation
Explanation: Bernoulli’s equation expresses conservation of mechanical energy in steady, incompressible, frictionless flow, including pressure…
Correct answer: Bernoulli equation- A. Laminar flow
- B. uniform flow
- C. Steady flow
- D. Transitional flow
Explanation: Laminar flow has smooth, orderly motion in which particles follow definite, non-crossing streamlines.
Correct answer: Laminar flow1259. A flow in which velocity of water particles is same at all sections is called ____________________?
- A. Steady flow
- B. Uniform flow
- C. Compressible flow
- D. Laminar flow
Explanation: Uniform flow means the flow velocity does not change from section to section along the direction of flow.
Correct answer: Uniform flow- A. Atmospheric pressure
- B. absolute pressure
- C. Vacuum pressure
- D. gauge pressure
Explanation: A piezometer measures pressure relative to atmospheric pressure, so its reading represents positive gauge pressure.
Correct answer: gauge pressure