# Civil Engineering - UPSC Civil Service Exam Questions

6.

Consider the following statements :
Total flat is :
1. the time span by which the starting (or finishing) of an activity can be delayed without delaying the completion of the project.
2. difference between maximum time available and the actual time required to perform the activity.
3. difference between its earliest finish time and the earliest start time of its successor activity.
Which among the following is/are correct ?

 A. 2 and 3 B. 1, 2 and 3 C. 1 only D. 1 and 2

Explanation:

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7.

In a linear reservoir, the

 A. volume varies linearly with elevation B. outflow rate varies linearly with storage C. storage varies linearly with time D. storage varies linearly with inflow rate

Explanation:

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8.

The given figure shows the relation between void ratio and shear strain for a sand under two density conditions. The void ratio corresponding to the dashed line is called

 A. optimum void ratio B. critical void ratio C. residual void ratio D. undisturbed void ratio

Explanation:

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9.

The separation of boundary layer takes place when the pressure gradient is

 A. negative B. positive C. zero D. constant

Explanation:

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10.

A free vortex formed from originally still water, say, as when draining still water in a flat-bottomed basin by suddenly pulling the stopper at the bottom on the drain hole, will be

 A. clockwise in the northern as well as the southern hemispheres B. anticlockwise in the northern as well as the sourthern hemispheres C. anticlockwise in the northern hemisphere and clockwise in the southern hemisphere D. clockwise in the northern hemisphere and anticlockwise in the southern hemisphere