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 61 of 116
- A. Mixing of water
- B. Amalgamation
- C. Desalinization
- D. All are correct
Explanation: Combining saline water with fresh water in a specified proportion is commonly described as amalgamation or blending, with the aim of…
Correct answer: Amalgamation- A. Normal depth
- B. Full supply depth
- C. Critical depth
- D. None of these
Explanation: At critical depth, the specific energy of an open-channel flow is minimum for a given discharge.
Correct answer: Critical depth- A. Half of its width
- B. Equal to its width
- C. Twice the width
- D. one-third of its with
Explanation: For the most economical rectangular channel, the width is twice the depth, so the depth is half the width.
Correct answer: Half of its width1204. According to Chezy's formula, the discharge through an open channel is equal to _________________?
- A. C (mi) 1/2
- B. A (cmi)1/2
- C. Ac√R.S
- D. A (c.A/pi) 1/2
Explanation: Chezy's equation gives mean velocity as C√(RS), where R is hydraulic radius and S is the energy or channel slope.
Correct answer: Ac√R.S- A. d/2
- B. d/3
- C. d/4
- D. d/6
Explanation: Hydraulic mean depth here means hydraulic radius, equal to flow area divided by wetted perimeter.
Correct answer: d/4- A. 4fLv2/gd
- B. 4fLv2/2gd
- C. 4fLv/gd
- D. 4fLv/2gd
Explanation: Darcy-Weisbach loss is h_f = 4f(L/D)(v²/2g) when f is the commonly used Fanning friction factor; this is option b.
Correct answer: 4fLv2/2gd- A. (2 gh)1/2
- B. 2(gh)1/2
- C. 2g (h)1/2
- D. 2gh
Explanation: Using Torricelli’s theorem, the theoretical jet velocity under a head h is v = √(2gh).
Correct answer: (2 gh)1/2- A. Non-uniform flow
- B. one-dimension flowAccess Government Careers
- C. steady flow
- D. un-steady flow
Explanation: A one-dimensional flow is represented by straight, generally parallel streamlines, with the flow variables considered to change mainly in…
Correct answer: one-dimension flowAccess Government Careers1209. A flow in which the quantity of liquid flowing per second is constant is called___________________?
- A. Uniform flow
- B. Turbulent flow
- C. Steady flow
- D. None of these
Explanation: Flow is called steady when the discharge or other flow properties at a given point do not change with time.
Correct answer: Steady flow- A. None of these
- B. Law of gravity
- C. Newton's law of otion
- D. Archimed's Principle
Explanation: Archimedes’ principle states that an immersed body experiences an upward buoyant force equal to the weight of the fluid it displaces.
Correct answer: Archimed's Principle- A. w H
- B. WH2 2
- C. W.H/2
- D. wh2
Explanation: For a vertical wall submerged to depth H, pressure increases linearly from zero at the surface to wH at the bottom, forming a triangular…
Correct answer: WH2 2- A. Capillarity
- B. Compressibility
- C. Viscosity
- D. Specific gravity
Explanation: Viscosity is the internal resistance of a liquid to relative movement between its layers, so it controls how readily the liquid flows.
Correct answer: Viscosity- A. Specific weight
- B. Specific gravity
- C. Mass density
- D. None of these
Explanation: Mass density is defined as mass per unit volume, expressed as ρ = m/V. Specific weight is weight per unit volume, while specific gravity…
Correct answer: Mass density- A. All are correct
- B. Armouring
- C. Revetment
- D. Pitching
Explanation: Placing stone boulders or similar material on an embankment slope to resist wave wash is called pitching.
Correct answer: Pitching- A. Gravity water
- B. Capillary water
- C. Hygroscopic water
- D. All are correctOrder Water Delivery
Explanation: Gravity water moves downward through unsaturated soil under the force of gravity, unlike hygroscopic water, which is tightly held by soil…
Correct answer: Gravity water- A. Discharge
- B. Specific volume
- C. Specific capacity
- D. All are correct
Explanation: Specific capacity is the well's discharge divided by the corresponding drawdown, commonly expressed as litres per minute per metre of…
Correct answer: Specific capacity- A. 2%
- B. 2.5%
- C. 3%
- D. 3.2%
Explanation: Freshwater makes up about 2.5% of the Earth's total water; the remaining roughly 97.5% is saline.
Correct answer: 2.5%- A. 1.35 x 10^9km3
- B. 1.32 x 10^9km3
- C. 1.33 x 10^9km3
- D. 1.30 x 10^9km3
Explanation: The Earth's total water volume is commonly estimated at about 1.35 to 1.4 billion cubic kilometres, so 1.35 × 10^9 km³ is the closest…
Correct answer: 1.35 x 10^9km31219. Permissible velocity of water flowing through concrete lined tunnel is usually __________________?
- A. 3 - 4m/sec
- B. 4 - 5m/sec
- C. 5 - 6m/sec
- D. 6 - 7m/sec
Explanation: Concrete lining reduces seepage and protects the tunnel from erosion, allowing a relatively high permissible velocity.
Correct answer: 4 - 5m/sec- A. Turbulent flow
- B. Laminar flow
- C. Circular flow
- D. Rotational flow
Explanation: In rotational flow, water particles move downstream while also rotating about their own mass centres.
Correct answer: Rotational flow