Q140. Which listed resource is non-renewable?
[RRB NTPC Undergraduate, 7 May 2026]
(A) Petroleum
(B) Sunlight
(C) Biomass
(D) Wind
Answer: A. Petroleum
Explanation: Petroleum originates from organic matter transformed under sedimentary pressure and heat over millions of years. Extracted reserves are finite. Sunlight and wind are naturally recurring flows, while biomass is renewable when it is harvested and replenished sustainably.
Q139. Under India’s Mission Coking Coal, what domestic coking-coal output target was set for 2029–30?
[SSC MTS, 11 February 2026]
(A) 100 million tonnes
(B) 140 million tonnes
(C) 180 million tonnes
(D) 200 million tonnes
Answer: B. 140 million tonnes
Explanation: Mission Coking Coal is intended to increase domestic availability of this steelmaking input and lower dependence on imports. Coking coal has properties allowing it to form metallurgical coke, unlike much thermal coal used directly for generating electricity.
Q138. A photo-capacitor designed for solar applications primarily stores energy obtained from what source?
[DSSSB MTS, 25 July 2026]
(A) Sound
(B) Chemical fuels
(C) Nuclear reactions
(D) Sunlight
Answer: D. Sunlight
Explanation: A photo-capacitor combines light harvesting with charge storage. Incoming solar radiation is converted into electrical energy and held temporarily for later use. It is related to photovoltaic storage technology rather than energy generated from combustion or atomic reactions.
Q137. As of March 2026, which state led India in installed wind-power capacity?
[DSSSB MTS, 27 July 2026]
(A) Rajasthan
(B) Maharashtra
(C) Gujarat
(D) Tamil Nadu
Answer: C. Gujarat
Explanation: Gujarat has expanded wind installations through onshore projects and large renewable-energy investments. Its coastal exposure and suitable wind corridors make it attractive for turbines. Rankings are date-specific and should not be confused with wind-potential estimates.
Q136. Whose pioneering radiation measurements provided important foundations for mapping India’s solar potential?
[RRB Group D, 18 August 2026]
(A) NASA satellite collection alone
(B) Anna Mani’s solar-radiation measurements
(C) Routine government weather forecasts alone
(D) University climate models alone
Answer: B. Anna Mani’s solar-radiation measurements
Explanation: Physicist and meteorologist Anna Mani helped establish solar-radiation measurement practices in India. Reliable insolation observations reveal where sunlight is strongest and help engineers estimate photovoltaic output, select locations and design renewable-energy projects.
Q135. Which international organisation promotes the ‘Towards 1000’ goals for solar energy?
[SSC GD Constable, 7 May 2026]
(A) World Trade Organization
(B) International Court of Justice
(C) International Solar Alliance
(D) SAARC
Answer: C. International Solar Alliance
Explanation: The International Solar Alliance coordinates efforts to accelerate solar investment, technology adoption and energy access. India and France played founding roles. Its targets concern large-scale finance, solar deployment and improved access to cleaner electricity.
Q134. Which of the following is recognised as India’s largest solar park by installed capacity in the cited exam?
[RRB NTPC Graduate, 17 March 2026]
(A) Bhadla Solar Park
(B) Rewa Solar Park
(C) Pavagada Solar Park
(D) Kurnool Solar Park
Answer: A. Bhadla Solar Park
Explanation: Bhadla Solar Park is in Rajasthan’s arid northwest, where large land parcels and strong sunshine favour photovoltaic generation. Projects such as Rewa, Pavagada and Kurnool are also important, but Bhadla has been cited as the largest.
Q133. Which pair names Odisha coalfields operated within the Mahanadi Coalfields region?
[OSSSC Forester, 3 May 2026]
(A) Talcher and Ib Valley
(B) Raniganj and Jharia
(C) Talcher and Korba
(D) Singrauli and Wardha
Answer: A. Talcher and Ib Valley
Explanation: Talcher and Ib Valley are major coal-producing regions in Odisha served by Mahanadi Coalfields Limited. Raniganj and Jharia lie in the Damodar basin farther north, while Korba and Singrauli belong to different coal-mining areas.
Q132. In which state is the Bhadla Solar Park located?
[RRB NTPC Undergraduate, 9 May 2026]
(A) Gujarat
(B) Madhya Pradesh
(C) Rajasthan
(D) Maharashtra
Answer: C. Rajasthan
Explanation: Bhadla is situated in Rajasthan, close to the Thar Desert. Clear skies, high solar irradiance and extensive relatively open land favour utility-scale solar plants. The electricity is evacuated through grid infrastructure to consumers beyond the park.
Q131. In which year was the Coal Mines Authority established during India’s coal-sector restructuring?
[SSC MTS, 10 February 2026]
(A) 1969
(B) 1971
(C) 1973
(D) 1977
Answer: C. 1973
Explanation: Coal Mines Authority Limited was established in 1973 during the nationalisation and reorganisation of non-coking coal operations. The wider process unfolded in stages, and Coal India Limited was subsequently formed in 1975 to coordinate coal production.
