Q40. Which low-grade coal variety is notably found in Rajasthan?
[Rajasthan CET, 11 February 2023]
(A) Anthracite
(B) Metallurgical coke
(C) Lignite
(D) Peat only
Answer: C. Lignite
Explanation: Rajasthan has significant lignite resources in western districts such as Barmer and Bikaner. Lignite’s lower energy density encourages development of mines and power stations close together. The state also possesses exceptional solar-energy potential.
Q39. How does coal generally develop from buried vegetation over geological time?
[MP Police Constable, 12 September 2023]
(A) Rapid cooling of magma
(B) Evaporation of seawater
(C) Crystallisation of sandstone
(D) Prolonged heat and pressure on organic material
Answer: D. Prolonged heat and pressure on organic material
Explanation: Coal formation begins with accumulated plant matter and proceeds through burial, pressure and temperature changes. Increasing coal rank generally raises carbon concentration. Because the process takes geological timescales, coal is classed as a non-renewable resource.
Q38. The Kawas gas-based power station is located in which state?
[SSC MTS (2022 cycle), 4 May 2023]
(A) Gujarat
(B) Maharashtra
(C) Uttar Pradesh
(D) Haryana
Answer: A. Gujarat
Explanation: Kawas is an NTPC gas-based generating station in Gujarat. Gas-fired turbines are different from coal boiler units and can complement other electricity supplies. Identifying plant states helps map the geography of India’s thermal-power network.
Q37. Which unit is commonly used to measure electrical energy consumed?
[SSC MTS (2022 cycle), 3 May 2023]
(A) Kilovolt
(B) Ampere
(C) Kilowatt-hour
(D) Ohm
Answer: C. Kilowatt-hour
Explanation: The kilowatt-hour measures energy, not instantaneous power. One kilowatt used for one hour equals one kilowatt-hour. Electricity bills and generation statistics routinely use this unit, while watts and kilowatts specify the rate of energy use.
Q36. Which application does NOT normally rely on a solar-cell power supply in the cited comparison?
[SSC CGL, 18 July 2023]
(A) Satellites
(B) Rural lighting
(C) Conventional lift motors in a building
(D) Solar calculators
Answer: C. Conventional lift motors in a building
Explanation: Solar cells power small devices, remote systems and satellites by converting light to electricity. Conventional building lifts usually draw substantial electricity from the grid. The distinction concerns typical applications rather than an absolute technical impossibility.
Q35. Who is widely called the father of India’s nuclear programme?
[SSC CHSL (2022 cycle), 9 March 2023]
(A) Homi J. Bhabha
(B) Vikram Sarabhai
(C) Meghnad Saha
(D) C. V. Raman
Answer: A. Homi J. Bhabha
Explanation: Homi Jehangir Bhabha established key institutions and helped design India’s long-term atomic-energy programme. His work laid foundations for nuclear science, fuel-cycle development and eventual civilian electricity generation through nuclear reactors.
Q34. The Hirakud captive thermal power station is associated with which state?
[SSC MTS (2022 cycle), 10 May 2023]
(A) Odisha
(B) Punjab
(C) Kerala
(D) Assam
Answer: A. Odisha
Explanation: Hirakud is in Odisha, a state with significant industrial activity and nearby coal resources. A captive thermal station supplies electricity for industrial operations. The locality is also identified with the important Hirakud multipurpose dam.
Q33. Which airport was reported as using both solar and hydropower to meet its energy needs?
[SSC CHSL (2022 cycle), 13 March 2023]
(A) Indira Gandhi International Airport, Delhi
(B) Chennai Airport
(C) Jaipur Airport
(D) Patna Airport
Answer: A. Indira Gandhi International Airport, Delhi
Explanation: Delhi’s Indira Gandhi International Airport reported sourcing electricity through solar and hydropower arrangements. Large transport hubs can lower operational emissions by purchasing renewable electricity even when generating assets are located elsewhere.
Q32. Which statement is incorrect about India’s lignite deposits?
[SSC CHSL (2022 cycle), 14 March 2023]
(A) Lignite is brown coal
(B) Neyveli is a major deposit
(C) Lignite has relatively high moisture
(D) Lignite is the highest-grade metallurgical coal
Answer: D. Lignite is the highest-grade metallurgical coal
Explanation: Lignite is low-rank brown coal with comparatively high moisture. It is not the highest-grade metallurgical coal, which requires suitable coking characteristics. Neyveli in Tamil Nadu is a prominent lignite centre supplying nearby power generation.
Q31. How many principal petroleum products were excluded from the GST framework when GST was introduced?
[SSC GD (2022 cycle), 8 February 2023]
(A) Three
(B) Four
(C) Five
(D) Six
Answer: C. Five
Explanation: Five petroleum-related products—crude petroleum, petrol, diesel, natural gas and aviation turbine fuel—were kept outside the ordinary GST levy framework. Their treatment affects the taxation and pricing structure of India’s energy commodities.
