The bearing of AB is 190� and that of CB is 260� 30'. The included angle ABC, is

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Question
The bearing of AB is 190� and that of CB is 260� 30'. The included angle ABC, is
Options
A. 80� 30'
B. 99� 30'
C. 70� 30'
D. none of these

Correct Answer

70� 30'

Surveying problems

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1. To set out a parallel from a given inccessible point to a given line AB, the following observations and made
Distance AB and angle PAM = a and angle PBA = b are measured where Mis a point on the line BA produced. The perpendicular to the desired parallel line from A and B are :
Options
A.
B.
C.
D.

3. In levelling operation,
Options
A. The first sight on any change point is a back sight
B. The second sight on any change point is a fore sight
C. The line commences with a fore sight and closes with a back sight
D. The line commences with a back sight and closes with a foresight.

4. Ranging in chain survey means
Options
A. looking at an isolated point not on the line
B. establishing an intermediate point on the line
C. determining the distance between end points
D. determining the offset distance
E. none of these

7. Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are known as
Options
A. cadastral surveys
B. city surveys
C. topographical surveys
D. guide map surveys
E. plane surveys.

8. The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called
Options
A. brightness of telescope
B. magnification of telescope
C. resolving power of telescope
D. none of these.

10. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known
Options
A. levelling
B. centering
C. orientation
D. setting.

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