# Civil Engineering - UPSC Civil Service Exam Questions

11.

The plastic modulus of a section is 5 x 10-4m3. Its shape factor is 1.2 and the plastic moment capacity is 120 kNm. What is the value of the yield stress of the material ?

 A. 100 N/mm2 B. 200 N/mm2 C. 240 N/mm2 D. 288 N/mm2

Explanation:

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12.

According to ICAO recommendations, what is the rate of elevation correction for the runway above MSL ?

 A. 1 % for every 100 m of elevation above MSL B. 7 % for every 300 m of elevation above MSL C. 2 % for every 500 m of elevation above MSL D. 2 % for every 300 m of elevation above MSL

Explanation:

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13.

The absolute maximum Bending Moment in a simply supported beam of span 20 m due to moving udl of 4 t/m spanning over 5 m is

 A. 87.5 t-m at the support B. 87.5 t-m near the midpoint C. 3.5 t-m at the midpoint D. 87.5 t-m at the midpoint

Explanation:

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14.

The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply systems :
1. Tarred gasket or hemp yarn in wrapped around the spigot.
2. The sipgot end is centered into the socket end of the preceding pipe.
3. A joining ring end is placed around the barrel and against the face of the socket.
4. The gasket or hemp yarn in caulked slightly.
5. Molten pig lead is poured and then caulked.
The correct sequence of these steps is

 A. 2, 1, 4, 3, 5 B. 2, 1, 3, 4, 5 C. 1, 2, 4, 5, 3 D. 1, 2, 3, 5, 4

Explanation:

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15.

Consider the following statements :
A : In masonry, bricks are joined together by cement mortar.
B : Cement mortar adheres more effectively to brick surface than any other material.

 A. both A and R are true and R is the correct explanation of A B. both A and R are true but R is not the correct explanation of A C. A is true but R is false D. A is false but R is true