Surveying and Leveling

Contour lines of different elevations can unite to form one line, only in the case of

• A vertical cliff

• A saddle

• A watershed line

• A hilltop

The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly

• 0.043 m

• 0.053 m

• 0.063 m

• 0.083 m

If the length of a transition curve is to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is

• 0.70 m

• 1.70 m

• 2.70 m

• 3.70 m

The longitudinal section of the surface of the bubble tube is

• Straight

• Circular

• Parabolic

• Elliptic

A traverse deflection angle is

• Less than 90°

• More than 90° but less than 180°

• The difference between the included angle and 180°

• The difference between 360° and the included angle

The least count of a Vernier scale is

• Sum of the smallest divisions of main and Vernier scales

• Value of one division of the primary scale divided by the total number of divisions of Vernier scale

• Value of one division of Vernier scale divided by the total number of divisions of the primary scale

• None of these

The tangent to the liquid surface in a level tube is parallel to the axis of the level tube at

• Every point of the bubble

• Either end of the bubble

• The mid-point of the bubble

• No where

The slope correction may be ignored if

• The slope of the ground is less than 3°

• To slope of the ground is say 1 in 19

• Both (a) and (b)

• Neither (a) nor (b)

The whole circle bearing of a line is 290°. Its reduced bearing is

• N 20° E

• N 20° W

• S 70° E

• N 70° W

The horizontal angle between true meridian and magnetic meridian is known

• Bearing

• Magnetic declination

• Dip

• Convergence