List of top Geophysics Questions asked in GATE Civil Engineering

In levelling between two points A and B on the opposite banks of a river, the readings are taken by setting the instrument both at A and B, as shown in the table. If the RL of A is 150.000 m, the RL of B (in m) is ....... (rounded off to 3 decimal places). 

Match the following in Column I with Column II.

The figure shows a propped cantilever with uniform flexural rigidity \( EI \) (in N.m\(^2\)) and subjected to a moment \( M \) (in N.m). Consider forces and displacements in the upward direction as positive.
Find the upward reaction at the propped support B (in N) when this support settles by \( \Delta \) (in metres).
 

A circular tube of thickness 10 mm and diameter 250 mm is welded to a flat plate using 5 mm fillet weld along the circumference. Assume Fe410 steel and shop welding.
As per IS 800:2007, the torque that can be resisted by the weld (in kN.m) is __________ (round off to one decimal place).
 

Free residual chlorine concentration in water was measured to be 2 mg/l (as Cl\(_2\)). The pH of water is 8.5. By using the chemical equation given below, the HOCl concentration (in \(\mu\)moles/l) in water is ___________ (round off to one decimal place).
\[ {HOCl} \rightleftharpoons {H}^+ + {OCl}^-, \quad pK = 7.50 \] Atomic weight: Cl = 35.5
 

Pick one or more CORRECT statement(s) from the choices given below, in the context of upstream and downstream cut-offs provided below the concrete apron of weirs/barrages constructed across alluvial rivers.
 

In the context of construction materials, which of the following statements is/are CORRECT?
 

The bacteria mainly responsible for crown corrosion in a sewer is ___________.