Pick up the correct statement from the following?

A. The incidental expenses of a miscellaneous character which could not be predicted during preparation of the estimate, is called contingencies
B. Additional supervising staff engaged at work site, is called work charged establishment
C. Detailed specifications specify qualities, quantities and the proportions of materials to be used for a particular item
D. All the above

In the mid-section formula__________________?

A. The mean depth is the average of depths of two consecutive sections
B. The area of mid-sections is calculated by using mean depth
C. The volume of the earth work is calculated by multiplying the mid-section area by the distance between the two original sections
D. All of the above

Stanton diagram is a______________?

A. log-log plot of friction factor against Reynolds number
B. log-log plot of relative roughness against Reynolds number
C. semi-log plot of friction factor against Reynolds number
D. semi-log plot of friction factor against relative roughness

In a forced vortex motion, the velocity of flow is________________?

A. directly proportional to its radial distance from axis of rotation
B. inversely proportional to its radial distance from the axis of rotation
C. inversely proportional to the square of its radial distance from the axis of rotation
D. directly proportional to the square of its radial distance from the axis of rotation

In series-pipe problems_______________?

A. the head loss is same through each pipe
B. the discharge is same through each pipe
C. a trial solution is not necessary
D. the discharge through each pipe is added to obtain total discharge