SSC CPO SI and ASI Model Paper 10

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Directions (Q. 176–180): In the following questions, a sentenceis given, the underlined part of which may need improvement.Alternatives are given below at (1), (2), and (3),one of which may improve the sentence. In case no improvementis needed, the answer is (4).
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Question : 177 of 200
 
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When fire burns in an enclosed space, the reflected radiation preheats the fuel, making ignition much easier and the flames spreading more quickly.
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