Set 6 Practice Mode

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Q11366
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What type of level does not require any protection from the sun?
Q11367
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What is the process of levelling while the difference of level between two points is determined by setting the levelling instrument mid way the point?
Q11368
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What is the term of sight, if the last sight taken on a levelling staff held over a point of unknown elevation before shifting the instruments?
Q11369
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What is the term of sight, if the sight taken between the back sight and fore sight on a levelling staff held over a point of unknown elevations?
Q11370
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What is the level that combine good features both the dumpy level and 'y' level?