Q140. Which is the highest dam in India?
[SSC GD Constable (8 May 2026, Shift 2)]
(A) Bhakra Nangal
(B) Hirakud
(C) Tehri
(D) Sardar Sarovar
Answer: (C) Tehri
Explanation: Tehri Dam, built on the Bhagirathi in Uttarakhand, is about 260.5 metres high. It is a multipurpose dam supporting hydroelectric power, water supply and irrigation. Bhakra is another major dam, but it is not India’s highest.
Q139. Which dam is constructed on the Sutlej River?
[SSC GD Constable (7 May 2026, Shift 1)]
(A) Bhakra
(B) Nagarjuna Sagar
(C) Hirakud
(D) Tehri
Answer: (A) Bhakra
Explanation: Bhakra Dam impounds Sutlej water in Himachal Pradesh and forms the Gobind Sagar reservoir. The Bhakra–Nangal system supports canals irrigating land in Punjab, Haryana and Rajasthan, in addition to generating hydropower.
Q138. Which Odisha dam–river pair is correctly matched?
[OSSSC Forester/Forest Guard (30 April 2026, Shift 1)]
(A) Indravati–Krishna
(B) Balimela–Narmada
(C) Hirakud–Mahanadi
(D) Rengali–Godavari
Answer: (C) Hirakud–Mahanadi
Explanation: The Hirakud reservoir lies on the Mahanadi. Indravati is associated with the Indravati River, Balimela with the Sileru and Rengali with the Brahmani, so the other listed river pairs are not correct.
Q137. Which of these is not a micro-irrigation technique?
[SSC JE CBT-II Civil Engineering (7 April 2026)]
(A) Mist system
(B) Trickle method
(C) Surface flooding
(D) Bubbler irrigation
Answer: (C) Surface flooding
Explanation: Micro-irrigation supplies controlled quantities through emitters or small outlets. Trickle, bubbler and some mist systems use localized delivery. Surface flooding, in contrast, spreads comparatively large volumes over the field and is classed as conventional surface irrigation.
Q136. Which crop among these is most suitable for drip irrigation?
[SSC JE CBT-II Civil Engineering (7 April 2026)]
(A) Rice
(B) Wheat
(C) Sugarcane
(D) Jute
Answer: (C) Sugarcane
Explanation: Sugarcane is a water-demanding row crop for which emitters can target the active root area. Properly managed drip lines provide frequent measured applications, reduce runoff and can improve water-use efficiency compared with widespread surface flooding.
Q135. Which listed Rajasthan irrigation project had the greatest projected irrigation potential by December 2024?
[Rajasthan Police SI GK & GS (6 April 2026)]
(A) Parwan
(B) Eastern Rajasthan Canal Project
(C) Pipalakhunt High Level Canal
(D) Upper High Level Canal (Mahi)
Answer: (B) Eastern Rajasthan Canal Project
Explanation: The Eastern Rajasthan Canal Project was conceived to redistribute water in eastern Rajasthan, drawing on the Chambal basin system. Its planned irrigation command is larger than those of the other listed projects; proposed potential must not be confused with completed irrigation.
Q134. Which irrigation method uses emitters to deliver water directly to crop roots?
[RRB NTPC Graduate CBT-I (25 March 2026, Shift 2)]
(A) Overhead
(B) Flood
(C) Drip
(D) Sprinkler
Answer: (C) Drip
Explanation: Drip systems release water slowly through emitters beside plants. Targeting the root zone reduces evaporation from exposed surfaces, surface runoff and unnecessary wetting between rows. Filters and maintenance remain important to prevent emitter blockage.
Q133. Which irrigation system supplies water drop by drop at the root zone?
[RRB NTPC Graduate CBT-I (22 March 2026, Shift 2)]
(A) Sprinkler irrigation
(B) Sub-irrigation
(C) Drip irrigation
(D) Surface irrigation
Answer: (C) Drip irrigation
Explanation: The defining feature of drip irrigation is low-volume application near plant roots through pipes and outlets. Sprinklers spray over the crop, whereas surface methods spread water across land. Drip is particularly useful where irrigation water is scarce.
Q132. Which does not help explain the variety of farming practices in India?
[RRB NTPC Graduate CBT-I (19 March 2026, Shift 2)]
(A) Availability of irrigation
(B) Different soils
(C) Different climates
(D) Uniform landform
Answer: (D) Uniform landform
Explanation: Indian farming differs because climate, soils, topography and irrigation facilities vary considerably across regions. Uniform landforms would reduce rather than explain geographical diversity. The availability of canal or groundwater irrigation also shapes possible crops and cropping seasons.
Q131. Jawaharlal Nehru described which structures as the temples of modern India?
[RRB NTPC Graduate CBT-I (19 March 2026, Shift 1)]
(A) Hospitals
(B) Dams
(C) Schools
(D) Parliament
Answer: (B) Dams
Explanation: Nehru used the phrase for modern development works such as large dams, which he viewed as symbols of national progress. Multipurpose dams store and regulate water for irrigation, generate electricity and can assist flood management.
