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SSC CHSL 2021 PYQ — Question 23

SSC CHSL - 5 Aug 2021 - Shift 2 • English • Q23

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In the following passage, some words have been deleted. Select the most appropriate option to fill in each blank.

In the generation of hydroelectric power, water is collected or (1) ______ at a higher elevation and led downward (2) ______ large pipes to a lower elevation; the difference in elevations is (3) ______ as the head. At the end of its passage down the pipes, the falling water (4) ______ turbines to rotate. The turbines in turn drive generators, (5) ______ convert the turbines’ mechanical energy into electricity.

Select the most appropriate option to fill in blank no.3.

Show answer & explanation

Correct answer: A

Explanation

The correct answer is Option 1. i.e. known.

  • The sentence is discussing "the difference in elevations," and it implies that the elevation difference is already recognized, acknowledged, or established by someone or a group of people.
  • By using "known" in this sentence, it suggests that this information about the difference in elevations is already a familiar or established fact to the relevant individuals involved in the subject matter.
  • In this context, "known" is used as the past participle of the verb "know." The past participle is used to form the passive voice or as an adjective to describe a state resulting from a previous action.