Question
Explain why holes are made in hanging banners and hoardings.
✓
Answer
The banner and hoarding are generally having a large surface area and are put out side in open where they may subject to varying air pressure depending on wind conditions. If wind pressure is high, then air will exert a great amount of pressure on the banners or hoarding causing it to flutter or blown away. To prevent this, holes are made in hanging banner and hording, through which air pressure gets leaked causing less damage or fluttering to banners or hoarding.
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