# Civil Engineering - UPSC Civil Service Exam Questions

1.
Which type of light energy is effectively absorbed by CO2 in the lower boundary of the troposphere ?
X - rays
UV - rays
Visible light
Infra-red rays
Explanation:
No answer description is available. Let's discuss.

2.
The following steps are involved in laying a sewer in a trench :
1. Transferring the center line of the sewer to the bottom trench.
2. Setting sight rails over the trench.
3. Driving pegs to the level of the invert line of the sewer.
4. Placing the sewer of these steps is The correct sequence of these steps is
1, 2, 3, 4
2, 3, 4, 1
4, 2, 3, 1
2, 3, 1, 4
Explanation:
No answer description is available. Let's discuss.

3.
A horizontal rod AB carries three loads of 3.0 kg, 7.0 kg and 10.0 kg at distances of 2.0 cm, 9.0 cm and 15 cm respectively from A where it is hinged. Neglecting the weight of the rod, which is the point at which the rod will be balance ?
10.95 cm form A
11.25 cm from A
12.55 cm from A
13.25 cm form A
Explanation:
No answer description is available. Let's discuss.

4.
Distemper is used to coat
external concrete surfaces
interior surfaces not exposed to weather
woodwork
compound walls
Explanation:
No answer description is available. Let's discuss.

5.
Two simply supported beams B1 and B2 have spans l and 2l respectively. Beam B1 has a cross-section of 1 x 1 units and beam B2 has a cross-section of 2 x 2 units. These beams are subjected to concentrated loads W each at the centre of their spans. The ratio of the maximum flexural stress in these beams is
4
2