Set 7 Practice Mode

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Q11371
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What is the fundamental line in levels?
Q11372
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Which levelling instrument is required in second adjustment to make the line of collimation parallel to the axis of the bubble tube?
Q11373
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Which level instrument requires a signal permanent adjustment?
Q11374
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What is the postion of line of collimation, if observed staff reading is more than the required true staff reading?
Q11375
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What is the position of line of collimation While the observed reading is the less than the required true reading?