GAT Subject Engineering MCQs

Sedimentation allows denser particles or flocs to settle.
It reduces the load on subsequent filters.

Chlorine inactivates many disease-causing microorganisms.
A residual can protect water in the distribution system.

Ohm's law relates voltage, current, and resistance in a linear resistor.
It is written as V = IR.

Resistance is measured in ohms.
One ohm permits one ampere when one volt is applied.

Current is the rate of flow of electric charge.
One ampere equals one coulomb per second.

KCL follows conservation of charge.
Current entering a junction equals current leaving it.

A hydrograph plots streamflow or runoff against time.
It is used in flood analysis and drainage design.

Infiltration reduces direct surface runoff.
Its rate depends on soil, moisture, vegetation, and rainfall intensity.

The runoff coefficient reflects surface permeability and land use.
It is used in simplified peak-discharge methods such as the Rational Method.

The Rational Method relates peak flow to rainfall intensity, area, and runoff coefficient.
It is commonly used for small urban catchments.

Continuity expresses conservation of mass.
For incompressible flow, area times velocity remains constant without lateral flow.

CBR is an empirical measure of subgrade and base-material strength.
It is widely used in flexible pavement design.