Hydrology MCQs with Answers & Solutions

The twelve-month period starting and finishing at the time of seasonal minimum flow is defined as theSurface Water Hydrology

A dam that detains all or part of the flood waters of a river and gradually releases the stored water at controlled rates so that the entire region…Flood Control Structures

The method using continuity equation and conservation of momentum for flood routing is known asFlood Routing

To observe the cyclic trend present in the rainfall data, which of the following plot would be useful?Precipitation

For the determination of an average annual precipitation in a catchment basin, the best method isPrecipitation

The base flow is the difference betweenRunoff and Hydrographs

Which assumption of the unit hydrograph theory is not required in the application of IUH?Runoff and Hydrographs

The sediment transported by a stream or channel may be divided intoSediment Transport

The flow duration curve is a plot ofRunoff and Hydrographs

Water existing in the capillary zone is a part ofGroundwater Hydrology

The stream contributing runoff to groundwater is known asGroundwater Hydrology

For an unconfined aquifer, which of the following is the alternative name?Groundwater Hydrology

The specific capacity of an open well has the dimension ofGroundwater Hydrology

The most often used formula for estimating the return period isFlood Frequency Analysis

Consider the following statements about estimation of rainfall missing data 1. Normal Ratio method is applied when precipitation of selected station…Precipitation

Select the incorrect statementStreamflow Measurement

Consider the following statements: 1. When two wells operate simultaneously in the same aquifer, their cones of depression may overlap. 2. Increasing…Groundwater Hydrology

The probability of a 20-year flood to occur at least once in next 2 years isFlood Frequency Analysis

A rating curve at a stream gauging station represents a relationship betweenStreamflow Measurement

Assertion (A): Increasing the live storage capacity of a reservoir can help in reducing the severity of downstream floods. Reason (R): A reservoir…Reservoir Storage and Flood Control

The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.Precipitation

The geological formation which yields only insignificant quantity of ground water is anGroundwater Hydrology

A 4-hour unit hydrograph of a certain basin has a peak ordinate of 80 m³/sec. The peak ordinate of a 2-hour unit hydrograph for the same basin will beRunoff and Hydrographs

The type of precipitation due to lifting of moist air converging into a low pressure belt isPrecipitation

The term ‘Catchment Area’ refers toSurface Water Hydrology

The infiltration capacity of a soil is highest atInfiltration

Flood routing is used to determineFlood Routing

In hydrology, drought is defined asPrecipitation

Due to urban development, the storm water discharge in urban catchment increases because ofRunoff and Hydrographs

A 20 cm storm occurred for 6 hrs in a catchment having a CN of 50. What is the net rainfall using SCS method ?Runoff and Hydrographs

A storm with 12·0 cm precipitation produced a direct runoff of 6·8 cm. The time distribution of the storm is given in the following Table. What is…Infiltration

A confined aquifer is 6 m deep and the coefficient of permeability in the soil is 2 m³/day-m². The wells are 100 m apart and the difference in the…Groundwater Hydrology

In the context of clouds and raindrop formation, which one of the following give the minimum precipitation and are found at great heights (up to 12…Precipitation

The annual evaporation from a lake with surface area of 1500 hectare is 240 cm. What is daily average evaporation rate in hectare-metre per day…Evaporation

In the process of drainage of water through soil during rainfall, the excess water present is called :Groundwater Hydrology

A cyclone formed outside the tropical zone near the boundary between warm and cold air is called :Precipitation

Soil materials which have the property to store water due to good number of pores in them, but passage of water through them is not possible, are…Groundwater Hydrology

Statement (I): The water below the water table is known as soil moisture and above the water table as groundwater. Statement (II): Extending down…Groundwater Hydrology

The average rainfall of a country is a figure, which is averaged over a period ofPrecipitation

A retarding reservoir for flood control is the one which is provided withFlood Control Structures

IHP stands forSurface Water Hydrology

In the case of a water table well, the piezometric surfaceGroundwater Hydrology

An aquifer which is underlain by an impermeable layer at the bottom and not confined at the top is known asGroundwater Hydrology

A laboratory test on a sample from an aquifer revealed a porosity of 35%. The specific yield of the aquifer will beGroundwater Hydrology

The surface obtained by joining the water levels in several observation well’s penetrating a confined aquifer representsGroundwater Hydrology

Flow duration curve is a plot ofStreamflow Measurement

The runoff may be indirectly estimated by 1. empirical formulae relating rainfall and runoff 2. infiltration method 3. rational method and 4. unit…Runoff and Hydrographs

For the measurement of rainfall, rain gauges are used which may be 1. non-recording type 2. recording typePrecipitation

Mean depth of rainfall over an area may be obtained by 1. Arithmetic mean method 2. Theissen polygon method 3. Isohyetal methodPrecipitation

Depending on the shape, size and composition of the sediment particles and the velocity of the flowing water, the sediment particles are transported…Sediment Transport