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Prelims Booster 17 April 2026 – 5 UPSC & State PSC Practice Questions for Prelims

 1. Which river is also known as the Rewa?

a) Narmada

b) Tapi

c) Godavari

d) Chambal


Answer. a) Narmada

Context: 

1. A viral video showing 11,000 litres of milk being poured into the Narmada River during a ritual at the Pataleshwar Mahadev Temple in Sehore, Madhya Pradesh, has sparked a massive online debate.

2. The Narmada, also known as the Rewa, is one of the most sacred rivers in India and the largest westward-flowing river of the Indian peninsula. Known as the Life Line of Madhya Pradesh and Gujarat, it is unique as it flows in a rift valley between two major mountain ranges.


2. Which article of the Constitution currently limits the Lok Sabha to a maximum of 550 elected members?

a) Article 71

b) Article 81

c) Article 91

d) Article 99


Answer. b) Article 81

Context: 

1. The government has introduced the Constitution (131st Amendment) Bill and the Delimitation Bill to increase the Lok Sabha’s strength from 550 to 850.

2. Article 81 of the Constitution currently limits the Lok Sabha to a maximum of 550 elected members.


3. Scarborough Shoal is located in which sea?

a) Arabian Sea

b) Red Sea

c) Mediterranean Sea

d) South China Sea


Answer. d) South China Sea

Context:

1. Satellite imagery from April 2026 reveals that China has deployed a floating barrier and multiple vessels to block the entrance of the Scarborough Shoal.

2. Scarborough Shoal (known as Bajo de Masinloc in the Philippines and Huangyan Island in China) is a triangular-shaped chain of reefs and rocks with a central lagoon. It is located in the South China Sea.


4. Tehri Lake is located in which state?

a) Bihar

b) Uttar Pradesh

c) Uttarakhand

d) Himachal Pradesh


Answer. c) Uttarakhand

Context: 

1. Uttarakhand achieved a historic milestone as a 19-seater seaplane successfully completed trial landings on Tehri Lake, marking the start of a new era for regional connectivity.

2. Tehri Lake is one of the largest man-made lakes in Asia, formed by the impoundment of the Bhagirathi River by the Tehri Dam.


5. Which of the following best describes a sentinel species?

a) A species that is endangered and requires immediate conservation

b) A species used as an early warning indicator of environmental changes or pollution

c) A species that migrates seasonally to indicate climate change

d) A species that exists only in protected areas


Answer: b)

A sentinel species is a plant or animal that is highly sensitive to environmental changes and helps in detecting pollution or ecological imbalance early.

 Example:


Frogs (amphibians) indicate water pollution

Lichens indicate air quality



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