100. In which Himachal Pradesh district is Baira Siul Dam?
[SSC CPO (28 June, Shift 1), 2024]
(A) Kinnaur
(B) Mandi
(C) Bilaspur
(D) Chamba
Answer: (D) Chamba
Explanation: The Baira Siul hydropower project lies in Chamba district, Himachal Pradesh, within the Ravi river basin. Its generating works were an early major undertaking of the National Hydroelectric Power Corporation.
99. Match Hirakud, Nagarjuna Sagar, Sardar Sarovar, Tehri and Rana Pratap Sagar with their rivers.
[SSC CPO (27 June, Shift 1), 2024]
(A) Mahanadi, Krishna, Narmada, Bhagirathi, Chambal
(B) Krishna, Mahanadi, Narmada, Bhagirathi, Chambal
(C) Mahanadi, Krishna, Chambal, Bhagirathi, Narmada
(D) Mahanadi, Godavari, Narmada, Krishna, Chambal
Answer: (A) Mahanadi, Krishna, Narmada, Bhagirathi, Chambal
Explanation: The five dams represent distinct basins: Hirakud–Mahanadi, Nagarjuna Sagar–Krishna, Sardar Sarovar–Narmada, Tehri–Bhagirathi and Rana Pratap Sagar–Chambal. River–dam matching is essential for identifying the geography of major projects.
98. Which dam does NOT lie in Uttarakhand?
[RPF Sub-Inspector (9 December, Shift 1), 2024]
(A) Ramganga
(B) Lakhwar
(C) Tehri
(D) Nagi
Answer: (D) Nagi
Explanation: Nagi Dam is situated in Bihar, whereas Ramganga, Lakhwar and Tehri are in Uttarakhand. The latter are associated with river systems draining the Himalayan region, including the Ramganga, Yamuna and Bhagirathi.
97. Which dam–state pair is incorrect?
[RPF Sub-Inspector (13 December, Shift 1), 2024]
(A) Indira Sagar–Rajasthan
(B) Karjan–Gujarat
(C) Pong–Himachal Pradesh
(D) Koyna–Maharashtra
Answer: (A) Indira Sagar–Rajasthan
Explanation: Indira Sagar is a Narmada Valley project in Madhya Pradesh, not Rajasthan. Karjan lies in Gujarat, Pong on the Beas in Himachal Pradesh, and Koyna in Maharashtra.
96. Which dam–river combinations are correct: Ujani–Bhima, Srisailam–Krishna, Ukai–Tapi and Somasila–Pennar?
[Maharashtra Police Driver Constable (14 July), 2024]
(A) Only the first
(B) Second and fourth only
(C) First, third and fourth
(D) All four
Answer: (D) All four
Explanation: All four associations are correct. Ujani serves the Bhima basin, Srisailam the Krishna, Ukai the Tapi, and Somasila the Pennar. Together they illustrate water development across central and southern India.
95. Across which river does Hirakud Dam stand?
[Maharashtra Police Constable Mumbai (7 July), 2024]
(A) Godavari
(B) Sutlej
(C) Mahanadi
(D) Krishna
Answer: (C) Mahanadi
Explanation: The Hirakud project crosses the Mahanadi in Odisha. Its dykes and main structure together form a notably long dam system, which assists irrigation, flood management and hydroelectric power generation.
94. Tehri Dam is located in which Indian state?
[MPTET Varg 3 (12 November, Shift 1), 2024]
(A) Himachal Pradesh
(B) Punjab
(C) Uttar Pradesh
(D) Uttarakhand
Answer: (D) Uttarakhand
Explanation: Tehri Dam is in Tehri Garhwal district of Uttarakhand, built on the Bhagirathi. The large reservoir supports hydroelectricity and provides water to downstream demand centres.
93. The Koyna Dam is situated in which state?
[MPTET Varg 3 (12 November, Shift 1), 2024]
(A) West Bengal
(B) Maharashtra
(C) Rajasthan
(D) Punjab
Answer: (B) Maharashtra
Explanation: Koyna Dam is in Satara district, Maharashtra, on the Koyna River. Its reservoir feeds a major hydropower scheme and supports water regulation in the Western Ghats region.
92. On which river was Hirakud Dam built?
[OSSSC Forest Guard (1 May, Shift 2), 2024]
(A) Godavari
(B) Cauvery
(C) Mahanadi
(D) Krishna
Answer: (C) Mahanadi
Explanation: Hirakud is a principal multipurpose development on the Mahanadi near Sambalpur. Its reservoir stores monsoon flow for controlled use in irrigation and electricity generation, while helping moderate floods in the delta.
91. Bhakra–Nangal Dam is established on which river?
[Bihar D.El.Ed. (3 April, Shift 2), 2024]
(A) Narmada
(B) Yamuna
(C) Sutlej
(D) Beas
Answer: (C) Sutlej
Explanation: The Bhakra–Nangal project uses the Sutlej River. The major upstream Bhakra storage dam and downstream Nangal works combine hydropower production with regulated delivery of irrigation water.
