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 56 of 116
- A. Blight
- B. Lane
- C. Khosla
- D. Darcy
Explanation: Khosla developed the theory of seepage flow and used flow nets to analyse hydraulic structures, including uplift pressure and exit…
Correct answer: Khosla- A. Stone blocks
- B. Stone apron
- C. Stone boom
- D. Vertical cutoff
Explanation: A vertical cutoff at the downstream exit lengthens the seepage path and reduces the exit gradient, helping prevent piping and scour.
Correct answer: Vertical cutoff- A. 3:1 to 5:1
- B. 2.5:1 to 3:1
- C. 2:1 to 2.5:1
- D. 5:1 to 6
Explanation: A downstream glacis slope of about 3:1 to 5:1 promotes a strong hydraulic jump and effective energy dissipation in the stilling basin.
Correct answer: 3:1 to 5:1- A. Lowering down of bed
- B. Retrogression
- C. Ponding on down stream
- D. All are correct
Explanation: Retrogression is the progressive lowering and erosion of the riverbed downstream of a weir or barrage.
Correct answer: Retrogression1105. The water way from a weir is determined by using Lacey's wetted perimeter i.e. P=_______(Q)1/2 ?
- A. 3.50
- B. 3.75
- C. 4.75
- D. 5.75
Explanation: For Lacey's regime theory, the wetted perimeter is commonly written as P = 4.75√Q when the silt factor is taken as unity.
Correct answer: 4.75- A. Cistern
- B. Water pool
- C. Down stream pond
- D. Water cushion
Explanation: A cistern is a depressed stilling basin or water pool provided downstream of a hydraulic structure, where the water cushion dissipates the…
Correct answer: Cistern- A. Modular
- B. Non-modular
- C. Semi-modular
- D. Rigid module
Explanation: A non-modular outlet has discharge governed by the difference in head between the distributary and the watercourse.
Correct answer: Non-modular- A. Rigid module
- B. Non-flexible
- C. Flexible module
- D. Non-modular
Explanation: A flexible module, also corresponding to a semi-modular outlet in this classification, has discharge controlled mainly by the water level…
Correct answer: Flexible module- A. Sensitivity
- B. Proportionally
- C. Setting
- D. Flexibility
Explanation: Sensitivity is the rate of change of outlet discharge per unit change in the distributary water level, expressed as dQ/dH.
Correct answer: Sensitivity- A. Syphon
- B. Super-passage
- C. Syphon - Aqueduct
- D. Canal-syphon
Explanation: In a super-passage, the drain passes over the canal while the canal flows freely under gravity below the drain bed.
Correct answer: Super-passage- A. Super passage
- B. Canal crossing
- C. Level crossing
- D. Drainage crossing
Explanation: When a canal and a drainage channel meet at nearly the same bed level, the cross-drainage structure is a level crossing.
Correct answer: Level crossing- A. Inlet
- B. Exit
- C. Module
- D. Out let
Explanation: An outlet is an opening in the canal bank that carries excess canal water through a lead channel into a nearby drain.
Correct answer: Out let- A. 1000 mg/litre
- B. 1200 mg/litre
- C. 1300 mg/litre
- D. 1500 mg/litre
Explanation: A commonly used permissible upper limit for total dissolved solids in drinking water is 1500 mg/L, although lower values are preferred for…
Correct answer: 1500 mg/litre- A. g2d
- B. gd
- C. 2gd
- D. gd2
Explanation: Using the Darcy-Weisbach convention in the question, head loss is given by hf = 4fLv²/(2gd).
Correct answer: 2gd- A. 4.5 ml sec to 5 m/ sec
- B. 3m / sec to 4m/ sec
- C. 4m / sec to 4.5 ml sec
- D. 1 m / sec to 3m/ sec
Explanation: A sewer is commonly designed for a flow velocity of about 1 to 3 m/s, balancing self-cleansing action against excessive scouring and…
Correct answer: 1 m / sec to 3m/ sec1116. A digging out of earth to make trench for any engineering purpose is called ______________________?
- A. Excavation
- B. Cavitations
- C. borrow pitting
- D. Earth filling
Explanation: Excavation means removing earth to form a trench, foundation or other required cut for engineering work.
Correct answer: Excavation- A. Disinfected
- B. Infected
- C. Cleaned
- D. Iodized
Explanation: Chlorine, ultraviolet radiation and bromine are used to disinfect swimming-pool water by destroying or inactivating disease-causing…
Correct answer: Disinfected- A. Salinity
- B. Poisoning
- C. Alkalinity
- D. Turbidity
Explanation: Calcium and magnesium salts commonly cause hardness and may contribute to salinity or alkalinity, but they are not ordinarily classified…
Correct answer: Poisoning- A. entrance
- B. Out let
- C. Inlet
- D. Mixing
Explanation: An inlet is an opening cut in the canal bank to admit upland drainage water, with stone pitching protecting the bank from erosion.
Correct answer: Inlet- A. Super passage
- B. Syphon - Aqueduct
- C. Aqueduct
- D. Canal-syphon
Explanation: When the canal passes below the drainage and flows under pressure or siphonic action, the cross-drainage work is called a canal-siphon.
Correct answer: Canal-syphon