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Practice Reading: Multiple Choice, Multiple Answers ID: #36988 A comparative analysis

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A comparative analysis of performance and emission of five non-edible vegetable oils (Nerium oil, Jatropha, Pongamia, Mahua and Neem oils) blends with diesel of different proportions has revealed that Nerium oil has better performance and emission characteristics, compared to esters of Jatropha, Pongamia, Mahua and Neem oils. Without compromising the engine performance, the Nerium blend can be used in existing diesel engines. It is scientifically established that a blended diesel fuel (comprising 20% of biodiesel and 80% of diesel) gives optimum performance on the conventional diesel engine. Obviating any engine modifications, biodiesel can easily operate in a compression-ignition (diesel) engine while vegetable and waste oils operate only in fuel converted diesel engines. The use of biodiesel in conventional diesel engines steeply reduces the emission of major pollutants like unburned hydrocarbons (HCs), carbon monoxide (CO) and particulate matters. Non-edible oils obtained from plant Species: karanj, Jatropha, Manual, Neem (Azadirachta Indica) can be used as a Biodiesel. As compared to biodiesel and fossil diesel, Neat vegetable oil which can grow in a rural area easily has the highest potential of reducing greenhouse gas emissions.

According to the text which statements are correct?

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Nerium oil showed better performance and emission characteristics. Jatropha showed better performance and emission characteristics. Mahua showed better performance and emission characteristics. Neem oils with properties close to diesel showed better performance and emission characteristics. Diesel engine runs successfully on a blend of 20% biodiesel and 80% diesel fuel without affecting the engine. Major pollutants increase the use of biodiesel.

Result:

A.I. Explanation:

Option 1: "Nerium oil showed better performance and emission characteristics."
Explanation: The text states that "Nerium oil has better performance and emission characteristics, compared to esters of Jatropha, Pongamia, Mahua and Neem oils." This directly supports the correctness of this option, as it aligns with the main idea of the text regarding the comparative analysis of the oils.
Option 2: "Jatropha showed better performance and emission characteristics."
Explanation: The text explicitly mentions that Nerium oil outperforms Jatropha, indicating that Jatropha does not have better performance. Therefore, this statement contradicts the information provided in the text.
Option 3: "Mahua showed better performance and emission characteristics."
Explanation: Similar to Jatropha, the text indicates that Mahua does not perform better than Nerium oil. The comparative analysis shows that Mahua is among the oils that do not match the performance of Nerium, making this statement incorrect.
Option 4: "Neem oils with properties close to diesel showed better performance and emission characteristics."
Explanation: The text does not support the claim that Neem oils have better performance characteristics. Instead, it emphasizes that Nerium oil is superior, thus making this statement incorrect.
Option 5: "Diesel engine runs successfully on a blend of 20% biodiesel and 80% diesel fuel without affecting the engine."
Explanation: The text states that "a blended diesel fuel (comprising 20% of biodiesel and 80% of diesel) gives optimum performance on the conventional diesel engine." This confirms that the blend operates successfully without compromising engine performance, validating this option.
Option 6: "Major pollutants increase the use of biodiesel."
Explanation: The text indicates that the use of biodiesel "steeply reduces the emission of major pollutants like unburned hydrocarbons (HCs), carbon monoxide (CO) and particulate matters." This means that the statement is incorrect as it contradicts the information about the effects of biodiesel on emissions.

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