Q120. Chilika is an example of which lake type?
[WBCS Mains (2019)]
(A) Crater lake
(B) Lagoon
(C) Glacial lake
(D) Aeolian lake
Answer: (B) Lagoon
Explanation: Chilika is a coastal lagoon formed behind a barrier on the Odisha shore. A channel links the water body with the Bay of Bengal, making it brackish. The balance of rainfall, inflowing streams, evaporation and coastal connections determines the waterbody’s character.
Q119. The Bhima is a tributary of which river?
[BPSC Assistant (2019)]
(A) Krishna
(B) Narmada
(C) Damodar
(D) Chambal
Answer: (A) Krishna
Explanation: The Bhima rises in Maharashtra and joins the Krishna farther downstream. It drains a large area of the Deccan and supports major irrigation projects. Regional relief, river outlets and tributary connections help distinguish the surrounding drainage basin geographically.
Q118. Which listed tributaries fall within the broader Ganga basin?
1. North Koel;
2. Barakar;
3. Sankh;
4. South Koel.
[65th BPSC Prelims (2019)]
(A) 1 only
(B) 2 only
(C) 1 and 2
(D) 3 and 4
Answer: (C) 1 and 2
Explanation: The North Koel feeds the Son and the Barakar feeds the Damodar–Hooghly system, both linked to Ganga drainage. Sankh and South Koel combine within the Brahmani basin. The wider drainage network links Himalayan tributaries with major alluvial floodplains and downstream deltas.
Q117. What does antecedent drainage mean in relation to the Indus and Brahmaputra?
[NDA-I General Ability Test (21 April 2019)]
(A) Rivers follow the first Himalayan slope
(B) Rivers existed before uplift of Himalayan ranges
(C) Rivers follow only bedding-plane dip
(D) Rivers follow only rock strike
Answer: (B) Rivers existed before uplift of Himalayan ranges
Explanation: Antecedent rivers maintain established courses while mountains rise, cutting deep gorges across the new topography. Indus and Brahmaputra are classic examples. Himalayan sediment, seasonal floodwater and heavy rainfall strongly shape the river channels and adjoining plains.
Q116. Amritdhara Falls is situated on which river?
[Chhattisgarh PSC Prelims (2019)]
(A) Maniyari
(B) Mahanadi
(C) Indravati
(D) Hasdeo
Answer: (D) Hasdeo
Explanation: Amritdhara Falls is on the Hasdeo River in the Koriya region of Chhattisgarh. The Hasdeo joins the Mahanadi via the Seonath drainage network. Waterfalls develop where river gradients shift abruptly, often across resistant rock or geological breaks.
Q115. At which river confluence is the Chandrhasini Devi temple located?
[Chhattisgarh PSC Prelims (2019)]
(A) Kelo and Ib
(B) Mand and Mahanadi
(C) Hasdeo and Seonath
(D) Indravati and Godavari
Answer: (B) Mand and Mahanadi
Explanation: The Chandrhasini Devi temple at Chandrapur in Chhattisgarh stands near the confluence of the Mand with the Mahanadi. The site is an important regional pilgrimage location. Regional relief, river outlets and tributary connections help distinguish the surrounding drainage basin geographically.
Q114. What is the moribund delta a part of?
[UPPCS Prelims (2019)]
(A) Krishna–Godavari delta
(B) Mahanadi delta
(C) Bengal delta
(D) Cauvery delta
Answer: (C) Bengal delta
Explanation: The moribund region occupies older, less active parts of the Ganga–Brahmaputra delta, with silting waterways and reduced sediment delivery compared with active distributaries. Regional relief, river outlets and tributary connections help distinguish the surrounding drainage basin geographically.
Q113. Which river is famous for its fault-valley drainage?
[UPPCS Prelims (2019)]
(A) Chambal
(B) Damodar
(C) Gandak
(D) Ramganga
Answer: (B) Damodar
Explanation: The Damodar occupies an east-trending structural depression across the Chota Nagpur region. Its course is strongly influenced by the region’s geological faulting. Regional relief, river outlets and tributary connections help distinguish the surrounding drainage basin geographically.
Q112. Which of the following waterfalls is not located on the Narmada River?
[MPPSC State Service Prelims (2019)]
(A) Kapildhara
(B) Bhalkund
(C) Dugdhdara
(D) Bhedaghat
Answer: (B) Bhalkund
Explanation: Bhalkund Falls is on the Bina River. Kapildhara and Dugdhdara occur near Amarkantak on the Narmada system, while the dramatic cascade at Bhedaghat is known as Dhuandhar Falls. Waterfalls develop where river gradients shift abruptly, often across resistant rock or geological breaks.
Q111. Which river is used as an important inland waterway in India?
[WBCS Mains (2018)]
(A) Ganga
(B) Cauvery
(C) Mahi
(D) Luni
Answer: (A) Ganga
Explanation: The Ganga between Prayagraj and Haldia forms part of National Waterway 1, a major inland-navigation route. Several stretches support cargo and passenger transport. Regional relief, river outlets and tributary connections help distinguish the surrounding drainage basin geographically.
