उपलब्ध आधार और वक्रता और अपवर्तन के प्रभाव की उपेक्षा करने के साथ चित्र में दिए गए शीर्ष शक्ति (बिंदु Q) का निम्न स्तर क्या होगा बिंदु 'P' का न्यूनीकृत स्तर = X, D = क्षैतिज दूरी। α = कोण, h' = यंत्र की ऊँचाई।

This question was previously asked in
HPCL Engineer Civil 11 Aug 2021 Official Paper
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  1. [X - h' + D * tanα + 0.06735*D2]
  2. [X + h' - D * tanα]
  3. [X + h' + D * tanα]
  4. [X + h' + D * tanα + 0.06735*D2]

Answer (Detailed Solution Below)

Option 3 : [X + h' + D * tanα]
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Detailed Solution

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व्याख्या:

दिए गए आरेख से

 

तो, QQ' =  AQ' × Tanα  = h × Tanα ........ (1)

बिंदु Q का RL = बिंदु P का QL + उपकरण की ऊँचाई  +  QQ'

Q का RL = X + h' + D × Tanα 

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