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LEVELLING SURVEY
Set 8
Set 8
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Q11376
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What is the diameter of earth?
A
12842km
B
12742km
C
12724km
D
12785km
Q11377
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What is the curvature of earth correction?
A
0.1785D<sup>2</sup>
B
0.0857D<sup>2</sup>
C
0.0785D<sup>2</sup>
D
0.0787D<sup>2</sup>
Q11378
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Which level is that the line of sight remains horizontal once the operator has roughly levelled the instruments?
A
Dumpy level
B
Modern level
C
Wye level
D
Auto level
Q11379
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How many level screws are used to level the instruments?
A
Two level screws
B
Three level screws
C
Four level screws
D
Six level screws
Q11380
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How to eliminate parallel between the staff and reticle in auto level?
A
Turn the focusing knob
B
Adjust the levelling screw
C
Adjusting screw cover
D
Setting of the tripod
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