MCQ
Green Steel and Decarbonisation MCQ - Practice Questions with Answers
Solve 69 Green Steel and Decarbonisation questions for RAS/RPSC preparation.
Practice questions
Q1Consider the following statements about scrap-based steelmaking and recycling: 1) IEA states that scrap-based production is considerably less energy-intensive than producing steel from iron ore. 2) IEA gives the current scrap collection rate as about 85%. 3) IEA says scrap availability and quality are constraints on this route. 4) IEA says recycling alone can meet all raw-material needs for steel decarbonisation. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct. Statement 4 is false: IEA notes a scrap constraint, and its roadmap says recycling alone cannot reduce emissions to the extent needed.
Q2Consider the following statements about certification under India's Green Steel Taxonomy: 1. The taxonomy includes Scope 1 direct emissions from operations. 2. It excludes Scope 2 electricity-related indirect emissions from rating calculations. 3. Scope 3 activities listed include sintering, pellet making, coke making and raw material procurement. 4. NISST is designated as the nodal agency for measurement, reporting and verification and issuing green certificates. Which of the statements given above are correct?
Statements 1, 3 and 4 are correct. The NISST page includes Scope 1, includes Scope 3 activities such as sintering and coke making, and designates NISST for MRV and certificate issuance. Statement 2 is incorrect because Scope 2 indirect electricity emissions are also included.
Q3Consider the following statements about green hydrogen use in steel decarbonisation: 1. The National Green Hydrogen Mission supports pilot projects in the steel sector. 2. One eligible pilot route is one hundred per cent hydrogen-based direct reduced ironmaking using a vertical shaft. 3. The pilot guidelines prohibit hydrogen injection in existing blast furnaces. Which of the statements given above are correct?
Statements 1 and 2 are correct: the Mission supports steel-sector pilot projects, including one hundred per cent hydrogen-based direct reduced ironmaking using a vertical shaft. Statement 3 is incorrect because hydrogen injection in existing blast furnaces is one of the supported routes to reduce coal or coke consumption.
Q4Consider the following statements about EASyMelt technology being deployed at Tata Steel Jamshedpur: 1) EASyMelt replaces a significant share of metallurgical coke with syngas as the reducing agent in iron-making. 2) The project is expected to reduce CO2 emissions by less than ten per cent compared to baseline blast furnace operation. Which of the statements given above is/are correct?
Statement 1 is correct: EASyMelt replaces a significant share of metallurgical coke with syngas as the reducing agent, with syngas produced through top-gas recycling and reforming of coke-oven gas. Statement 2 is incorrect because the project targets a CO2 reduction of MORE than fifty per cent compared to the baseline operation, not less than ten per cent.
Q5Consider the following statements about green hydrogen in Indian steelmaking: 1) The Government states that hydrogen-based production of green steel is already commercially viable in India. 2) Supported projects focus on partial substitution of natural gas with hydrogen in vertical shaft-based DRI production. 3) Supported projects also include injection of hydrogen into existing blast furnaces to reduce coal and coke consumption. 4) The Ministry of Steel page treats solar and wind energy as relevant to producing green hydrogen. Which of the statements given above are correct?
Statement 1 is false: the page says the technology is not commercially viable in the country at present. Statements 2, 3 and 4 are correct: the supported routes include hydrogen use in shaft DRI and blast furnaces, and renewable energy is linked to green-hydrogen production.
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6Consider the following statements about steelmaking routes and emissions: 1. The steel sector contributes roughly 7 to 8 percent of global anthropogenic greenhouse-gas emissions. 2. Ore-based steelmaking commonly uses a blast furnace with coal, or direct reduction with natural gas. 3. Scrap-based steelmaking primarily uses blast furnaces charged with iron ore and coke. Which of the statements given above are correct?
7Consider the following statements about EASyMelt technology: 1. It uses syngas to replace a significant share of metallurgical coke as the reducing agent. 2. Its Jamshedpur project targets less than 10 per cent carbon dioxide emission reduction compared with baseline blast-furnace operation. 3. Its first industrial-scale deployment is planned at Tata Steel's E Blast Furnace at Jamshedpur Works in Jharkhand. Which of the statements given above are correct?
8Consider the following statements about the EASyMelt deployment at Jamshedpur: 1. The E Blast Furnace mentioned by Tata Steel has a capacity of 649 cubic metres. 2. The deployment is described as the world's first EASyMelt technology implementation. 3. Tata Steel's press release says the project will be implemented at a newly built greenfield steel plant outside Jamshedpur. Which of the statements given above are correct?
9Consider the following statements about EASyMelt technology: 1. It replaces a significant share of metallurgical coke with syngas as the reducing agent. 2. The project targets less than ten per cent carbon dioxide emission reduction compared to baseline blast furnace operation. 3. Its first industrial-scale deployment is planned at Tata Steel's 'E' Blast Furnace at Jamshedpur Works in Jharkhand. Which of the statements given above are correct?
10Consider the following statements about EASyMelt technology at Tata Steel Jamshedpur: 1. It replaces a significant share of metallurgical coke with syngas as the reducing agent. 2. The project targets less than ten percent carbon dioxide reduction compared with baseline blast furnace operation. 3. The first industrial-scale deployment is planned at Tata Steel's 'E' Blast Furnace at Jamshedpur Works in Jharkhand. Which of the statements given above are correct?
11Consider the following statements about scrap-based steelmaking: 1. Scrap-based production is considerably less energy-intensive than producing steel from iron ore. 2. Scrap-based production removes the need for electricity in electric arc furnaces. 3. The scrap collection rate is currently about eighty-five per cent. Which of the statements given above are correct?
12Consider the following statements about scrap-based steelmaking and decarbonisation: 1. IEA states that steel production from scrap requires around one-eighth of the energy of steel produced from iron ore. 2. IEA says scrap-based production is considerably less energy-intensive than producing steel from iron ore by blast furnaces or direct reduction. 3. The main constraint on the scrap-based route is the availability and quality of scrap. 4. IEA says scrap-based production has no emission-reduction benefit unless molten oxide electrolysis is also used. Which of the statements given above are correct?
13Consider the following statements about the technical flexibility of EASyMelt: 1. EASyMelt can use natural gas, coke oven gas, hydrogen, ammonia and electricity. 2. EASyMelt can still use conventional sinter feed. 3. SMS Group says EASyMelt avoids dependence on costly and scarce high-grade iron ore required by direct-reduction plants. 4. EASyMelt is described as requiring only high-grade iron ore and therefore being incompatible with sinter feed. Which of the statements given above are correct?
14Consider the following statements about India's Green Steel Taxonomy: 1. It defines green steel as steel with carbon dioxide-equivalent emission intensity less than 2.2 tonnes per tonne of finished steel. 2. Five-star green-rated steel has emission intensity lower than 1.6 tonnes of carbon dioxide-equivalent per tonne of finished steel. 3. Steel with emission intensity above 2.2 tonnes of carbon dioxide-equivalent per tonne of finished steel is still eligible for a three-star green rating. 4. The rating thresholds are to be reviewed every 3 years. Which of the statements given above are correct?
15Consider the following statements about India's National Green Hydrogen Mission: 1. The mission was approved by the Union Cabinet on 4 January 2023. 2. The mission has an outlay of Rs. 19,744 crore. 3. The mission's pilot projects are restricted to the transport sector and exclude steel. Which of the statements given above are correct?