Irrigation Engineering: Comprehensive Set 01 | Test Series

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Irrigation Mastery Set 1 (30 Qs) | Science Stoppers

Irrigation Engineering: Comprehensive Set 01

30 Target Questions for JE/AE Exams | ScienceStoppers.com

1. The first watering given to a crop when it is a few centimeters high is called: फसल के कुछ सेंटीमीटर ऊंचे होने पर दी जाने वाली पहली सिंचाई कहलाती है:
  • A) Paleo irrigation
  • B) Kor watering
  • C) Delta
  • D) Duty
Correct: B. Kor watering is the most critical and requires the maximum depth of water.
2. Duty is maximum at: ड्यूटी (Duty) अधिकतम कहाँ होती है?
  • A) Head of main canal
  • B) Head of branch canal
  • C) Head of distributary
  • D) On the field
Correct: D. As water travels from the canal head to the field, losses occur. Therefore, Duty (area/cumec) increases as we move toward the field.
3. If the GCA is 5000 ha and 80% of it is culturable, and intensity of irrigation for Rabi is 50%, find the area to be irrigated in Rabi. यदि GCA 5000 हेक्टेयर है और इसका 80% कृषि योग्य है, और रबी के लिए सिंचाई की तीव्रता 50% है, तो रबी में सिंचित होने वाला क्षेत्र ज्ञात करें।
  • A) 4000 ha
  • B) 2500 ha
  • C) 2000 ha
  • D) 5000 ha
Correct: C. CCA = 5000 × 0.8 = 4000 ha. Irrigated Area = 4000 × 0.5 = 2000 ha.
4. Which of the following is a non-perennial irrigation system? निम्नलिखित में से कौन सी एक गैर-बारहमासी (non-perennial) सिंचाई प्रणाली है?
  • A) Lift irrigation
  • B) Inundation irrigation
  • C) Storage irrigation
  • D) All of the above
Correct: B. Inundation (flood) canals flow only when the river is in high flood.
5. The “Critical Velocity Ratio” (m) for the Upper Bari Doab canal is: अपर बारी दोआब नहर के लिए “क्रांतिक वेग अनुपात” (m) है:
  • A) 1.0
  • B) 1.1
  • C) 0.9
  • D) 0.7
Correct: A. Kennedy used this canal as his baseline, so m = 1.0 there.
6. The relation between Duty (D), Delta (Δ), and Base Period (B) is: ड्यूटी (D), डेल्टा (Δ) और आधार अवधि (B) के बीच संबंध है:
  • A) Δ = 8.64 D / B
  • B) D = 8.64 B / Δ
  • C) Δ = 8.64 B / D
  • D) Both B and C
Correct: D. Both are the same formula rearranged. (Δ in meters, D in ha/cumec, B in days).
7. A “Level Crossing” is a cross-drainage work used when: “लेवल क्रॉसिंग” एक क्रॉस-ड्रेनेज कार्य है जिसका उपयोग तब किया जाता है जब:
  • A) Canal is above drainage
  • B) Drainage is above canal
  • C) Canal and drainage are at same level
  • D) Drainage is a small pipe
Correct: C. It involves a regulator to mix and then separate the two flows.
8. Laceys silt factor (f) for a particle size of 0.25 mm is: 0.25 मिमी के कण आकार के लिए लेसी का सिल्ट फैक्टर (f) है:
  • A) 0.88
  • B) 1.76
  • C) 0.44
  • D) 1.0
Correct: A. f = 1.76 √dmm = 1.76 × √0.25 = 1.76 × 0.5 = 0.88.
9. “Sodium adsorption ratio” (SAR) defines the: “सोडियम सोखना अनुपात” (SAR) क्या परिभाषित करता है?
  • A) Salinity of soil
  • B) Permeability of soil
  • C) Toxicity of water
  • D) Alkali hazard of irrigation water
Correct: D. It measures the relative concentration of Sodium to Calcium and Magnesium.
10. For a gravity dam, the most important condition for stability is that the resultant force must fall within: ग्रेविटी बांध के लिए, स्थिरता के लिए सबसे महत्वपूर्ण शर्त यह है कि परिणामी बल किसके भीतर गिरना चाहिए?
  • A) The heel
  • B) The toe
  • C) Middle third of the base
  • D) Upstream face
Correct: C. This ensures no tension is developed at the base of the dam.
11. A “Canal Fall” is provided when: “कैनाल फॉल” (Canal Fall) कब प्रदान किया जाता है?
  • A) Ground slope < Canal slope
  • B) Ground slope > Canal slope
  • C) Both are equal
  • D) Canal is in filling
Correct: B. To dissipate surplus energy when the ground falls away faster than the canal’s design slope.
12. Which canal is also known as a Watershed canal? किस नहर को वाटरशेड नहर के रूप में भी जाना जाता है?
  • A) Contour canal
  • B) Side slope canal
  • C) Ridge canal
  • D) Branch canal
Correct: C. Ridge canals follow the highest line of the area.
13. In a Lacey’s regime channel, if Q = 64 cumecs and f = 1, find the perimeter (P). लेसी रिजीम चैनल में, यदि Q = 64 क्यूमेक और f = 1 है, तो परिमाप (P) ज्ञात करें।
  • A) 38 m
  • B) 47.5 m
  • C) 30.4 m
  • D) 4.75 m
Correct: A. P = 4.75 √Q = 4.75 × 8 = 38 m.
14. The phreatic line in an earth dam follows: मिट्टी के बांध में फिएटिक लाइन किसका अनुसरण करती है?
  • A) Straight line
  • B) Circular arc
  • C) Base Parabola
  • D) Ellipse
Correct: C.
15. Meander length is the distance between: मिएन्डर लंबाई किसके बीच की दूरी है?
  • A) Inner banks
  • B) Consecutive crests of a curve
  • C) Width of the river
  • D) Tangent points
Correct: B. It is measured along the axial direction.
16. Irrigation water having SAR value of 20 is classified as: SAR मान 20 वाले सिंचाई जल को किस रूप में वर्गीकृत किया गया है?
  • A) Low sodium water
  • B) Medium sodium water
  • C) High sodium water
  • D) Very high sodium water
Correct: C. SAR 0-10 (Low), 10-18 (Medium), 18-26 (High).
17. A “Groynes” is a river training work built: “ग्रोइन्स” (Groynes) एक नदी प्रशिक्षण कार्य है जिसे बनाया जाता है:
  • A) Parallel to bank
  • B) Perpendicular to bank
  • C) At bridge sites only
  • D) Under the river bed
Correct: B. Also known as spurs, they deflect the current away from the bank.
18. Khosla’s “safe exit gradient” for coarse sand is: मोटे रेत (coarse sand) के लिए खोसला का “सुरक्षित निकास ढाल” (safe exit gradient) है:
  • A) 1/5 to 1/6
  • B) 1/4 to 1/5
  • C) 1/2 to 1/3
  • D) 1/1
Correct: A. Shingle is 1/4 to 1/5, Fine sand is 1/6 to 1/7.
19. If the depletion of available moisture is 50%, the “readily available moisture” is: यदि उपलब्ध नमी की कमी 50% है, तो “आसानी से उपलब्ध नमी” है:
  • A) Total available moisture
  • B) 50% of available moisture
  • C) 0%
  • D) Field capacity
Correct: B. Usually 75-80% is readily available, but here the specific fraction is defined by depletion.
20. Which spillway is called a “morning glory” spillway? किस स्पिलवे को “मॉर्निंग ग्लोरी” स्पिलवे कहा जाता है?
  • A) Ogee spillway
  • B) Chute spillway
  • C) Shaft spillway
  • D) Siphon spillway
Correct: C.
21. The most effective way to reclaim alkaline soil is: क्षारीय मिट्टी (alkaline soil) को पुनः प्राप्त करने का सबसे प्रभावी तरीका है:
  • A) Leaching
  • B) Adding Gypsum
  • C) Adding Lime
  • D) Flooding
Correct: B. Gypsum (Calcium Sulphate) replaces Sodium on soil particles.
22. “Available moisture” for plants is the moisture between: पौधों के लिए “उपलब्ध नमी” किसके बीच की नमी है?
  • A) Saturation and Field capacity
  • B) Field capacity and Wilting point
  • C) Wilting point and Hygroscopic water
  • D) Zero and Saturation
Correct: B.
23. In a gravity dam, the “Uplift Pressure” is reduced by: ग्रेविटी बांध में “अपलिफ्ट प्रेशर” किसके द्वारा कम किया जाता है?
  • A) Drainage galleries
  • B) Grouting
  • C) Both A and B
  • D) Increasing dam height
Correct: C. Grouting reduces permeability; galleries drain the water that seeps through.
24. What is the Delta for Rice (approximate)? चावल के लिए डेल्टा (लगभग) क्या है?
  • A) 120 cm
  • B) 45 cm
  • C) 190 cm
  • D) 10 cm
Correct: A. Rice requires heavy watering.
25. A “Super Passage” is a cross-drainage work where: “सुपर पैसेज” (Super Passage) एक क्रॉस-ड्रेनेज कार्य है जहाँ:
  • A) Canal is above drainage
  • B) Drainage is above canal
  • C) Both are at same level
  • D) Canal flows through a tunnel
Correct: B. Specifically, when the canal FSL is below the drainage bed.
26. “Consumptive use” is highest during: “उपभोगकारी उपयोग” (Consumptive use) सबसे अधिक कब होता है?
  • A) Initial stage
  • B) Mid-season stage
  • C) Harvest stage
  • D) Sowing stage
Correct: B. During the peak growth/flowering period.
27. An Ogee spillway is also known as: ओगी स्पिलवे (Ogee spillway) को और किस नाम से जाना जाता है?
  • A) Overflow spillway
  • B) Siphon spillway
  • C) Chute spillway
  • D) Side channel spillway
Correct: A. It follows the shape of a lower nappe of a weir.
28. The ratio of area irrigated to the volume of water used is: सिंचित क्षेत्र और उपयोग किए गए पानी के आयतन का अनुपात है:
  • A) Delta
  • B) Duty
  • C) Efficiency
  • D) Capacity factor
Correct: B.
29. A “Berm” in a canal is provided between: नहर में “बर्म” (Berm) किसके बीच प्रदान किया जाता है?
  • A) FSL and Top of Bank
  • B) Toe of bank and edge of cutting
  • C) Bed and side slope
  • D) Main canal and branch
Correct: B.
30. “Water logging” occurs when the water table is: जलभराव (Water logging) तब होता है जब जल स्तर:
  • A) 10m below ground
  • B) Within the root zone of plants
  • C) Below the sea level
  • D) Constantly falling
Correct: B. It prevents air circulation in the soil, leading to crop failure.

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