Question

In the figure shown below, the drive wheel P engages with the driven wheel Q through a pin marked in red. Which of the options describes the movement of Q, when P moves in the clockwise direction?

• A. Continuously anti-clockwise
• B. Intermittently anti-clockwise
• C. To and fro
• D. Intermittently clockwise

Answer 1

The Correct Option is B

To solve the problem of determining the movement of driven wheel Q, we must analyze the mechanism described between the drive wheel P and driven wheel Q. The mechanism uses a pin, marked in red, which interacts with Q. When wheel P rotates clockwise, the pin secures Q at certain positions. Given the options:

• Continuously anti-clockwise
• Intermittently anti-clockwise
• To and fro
• Intermittently clockwise

Analyzing each option:

1. Continuously anti-clockwise: Wheel Q does not move continuously since it relies on the intermittent interaction from the pin.
2. Intermittently anti-clockwise: This fits because the pin engages Q in specific positions as P rotates, causing Q to move in increments, hence 'intermittently'.
3. To and fro: Implies a back and forth motion, which the mechanism does not describe.
4. Intermittently clockwise: This would require the pin to push in the opposite direction, but the clockwise movement of P does not facilitate such motion for Q.

Thus, the correct option is "Intermittently anti-clockwise" as wheel Q moves sequentially due to the intermittent engagement from the pin of wheel P rotating clockwise.