Answer :

Final answer:

The dial indicator should be placed against the rotor face near the outer edge when measuring lateral run-out. This measurement is essential for ensuring rotor integrity, which affects performance. Additionally, the rotor area coverage is important in wind turbine placement for efficient energy production.

Explanation:

When measuring lateral run-out of a rotor, the dial indicator should be placed against the rotor face near the outer edge, where the rotor has the largest diameter. Lateral run-out is a measurement of the variation in the rotor's surface as it rotates and is crucial for assessing the condition of the rotor in various engineering applications. It’s important to ensure that the rotor is not warped or out of round, which can cause performance issues or uneven wear on the brake pads.

In a context related to wind turbines, as you might find in studying renewable energy technology, calculating the rotor area coverage, as mentioned in the prompt regarding the fraction of land covered by turbines is vital for efficient placement and power generation estimates. The provided statement implies that if wind turbines are placed 15 rotor diameters apart in one direction and 8 diameters apart in the cross direction, the land coverage per turbine based on its rotor area is about 0.65%. This is an insightful strategy for maximizing energy production while minimizing the necessary land use.

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