Civil Engineering MCQs with explanations

Question 1

In soils having same values of plasticity index, if liquid limit is increased, then________?

Accepted Answer

compressibility and permeability increase and dry strength decreases

Question 2

The self cleansing velocity for all sewers in India is usually________?

Accepted Answer

1.0 m/sec to 1.2 m/sec

Question 3

The angle of intersection of the two plane mirrors of an optical square is________?

Accepted Answer

45°

Question 4

In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is________?

Accepted Answer

[(100 + P1)/(100 – P2)] V1

Question 5

Minimum potential energy of a system will be in the position of________?

Accepted Answer

stable equilibrium

Question 6

3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is________?

Accepted Answer

300 mg/l

Question 7

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than________?

Accepted Answer

three members with unknown forces of the frame

Question 8

For design of sewers, percentage of sewage discharge is assumed________?

Accepted Answer

75 to 80%

Question 9

Pick up the correct statement from the following?

Accepted Answer

All the above

Question 10

The design period in years for pumping plants, is________?

Accepted Answer

5 to 10

Civil Engineering MCQs with Explanations