If whole circle bearing of a line is 120�, its reduced bearing is S 20� E S 60�

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Question
If whole circle bearing of a line is 120�, its reduced bearing is
Options
A. S 20� E
B. S 60� E
C. N 120� E
D. N 60� E.

Correct Answer

S 60� E

Surveying problems

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1. Accurate measurement of deflection angles with a transit not properly adjusted may be made by
Options
A. setting the vernier A at zero at back station and then plunging the telescope
B. setting the vernier A at zero at back station and turning the instrument to the forward station
C. taking two back sights one with the telescope normal and the other with telescope inverted
D. none of these.

5. If V is the speed of a locomotive in km per hour, g is the acceleration due to gravity, G is the distance between running faces of the rails and R is the radius of the circular curve, the required super elevation is
Options
A.
B.
C.
D.

6. Transition curves are introduced at either end of a circular curve, to obtain
Options
A. gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the transition curve with main curve
B. gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
C. gradual change of gradient from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
D. none of these.

9. A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25�C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 10⁶ kg/cm², the correction to be applied is
Options
A. - 0.000909 m
B. + 0.0909 m
C. 0.000909 m
D. none of these

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