GAT Subject Engineering MCQs

Reynolds number compares inertial and viscous effects.
Its magnitude helps classify pipe and channel flow regimes.

Coagulants neutralize particle charges and promote floc formation.
The larger flocs can then settle or be filtered.

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.

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

Traffic volume is commonly expressed as vehicles per hour or per day.
It supports capacity, design, and planning decisions.

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.