Which of the following devices is used to facilitate rotational movement in one direction only and to prevent movement in the opposite direction?

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PGCIL DT Electrical 5 May 2023 Official Paper
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  1. File
  2. Wrenches
  3. Screwdriver
  4. Spanner

Answer (Detailed Solution Below)

Option 2 : Wrenches
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The correct answer is option 2) Wrenches

Explanation:

Wrenches: Some wrenches are equipped with a ratcheting mechanism that allows for rotation in one direction while restricting it in the opposite direction. This design provides convenience and efficiency when removing or tightening fasteners in situations where movement is limited or restrictive. Therefore, in the context of the question, wrenches can indeed facilitate rotational movement in one direction only and prevent movement in the opposite direction.

File: Files are used for shaping or smoothing metal surfaces and do not contribute to one-way rotational movement.

Screwdriver: While screwdrivers facilitate rotational movement, they do not restrict it to one direction; they can turn a screw in both clockwise (tightening) and counterclockwise (loosening) directions.

Spanner: Spanner is another type of wrench, used to provide grip and mechanical advantage in applying torque to turn objects. Like wrenches, only some spanners are equipped with a ratcheting mechanism. Not all spanners can prevent movement in the opposite direction.

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