Civil Engineering UPSC PYQ 2020

The table given below shows a project's activities along with starting and finishing time and the budgeted cost. The conditions of contract allow measurements to be made monthly and payment of the amount certified less 5% retention to be paid to the contractor after a month of submission of bills. The first bill will be submitted after a month and subsequently every month. The retention amount is to be released after 6 months of completion of the project. The annual interest rate is 15% on locked-up capital. Calculate the total profit of the contractor if he earns 10% profit on the quoted cost. Activity A: starting month 0, duration 2 months, cost Rs 4.5 lakh/month; B: starting month 1, duration 3 months, Rs 4 lakh/month; C: starting month 3, duration 1.5 months, Rs 12 lakh/month; D: starting month 3, duration 1 month, Rs 15 lakh/month; E: starting month 3.5, duration 1.5 months, Rs 4 lakh/month; F: starting month 5, duration 1 month, Rs 20 lakh/month. All activities are independent.

Design a full penetration butt weld to connect a 16 mm thick bracket plate perpendicular to the flange of a column. A factored load of 230 kN is applied to the bracket at a distance of 350 mm from the flange of the column. Field welds and steel of grade Fe 250 were used. Also give a neat sketch of the connection. Use limit state procedure.

Enumerate various types of track junctions. Calculate all the elements required to set out a 1 in 12 turnout taking off from a straight BG track with its curve starting from the toe of the switch, i.e., tangential to the gauge face of the outer main rail and passing through the theoretical nose of crossing (TNC). The heel divergence is given as 11.4 cm.