MCQs of Agriculture – Water Management

Specific weight of a liquid is defined as the weight per unit volume at standard Temperature & pressure therefore specific weight of water of water is equal to ________ kg/

m³

in MKS system

Specific gravity of a liquid is defined as the ratio of its specific weight to that of pure water and standard temperature and pressure. Therefore specific gravity is equal to ________

Compressibility of a liquid is defined as vertical or contraction in volume with variation of pressure. Therefore water is considered as ________

Surface tension is the property of a liquid which enables it to resist tensile stress. the surface tension of water is equal to _______ Kg/m

The law which states that the intensity of pressure at any point in a liquid at rest is same in all directions___

An escape constructed with masonry or pitched with stones to dispose off surplus of tank or reservoir is called

A channel artificially constructed for water conveyance of appreciable quantities with no problem of silting and scouring is called ______

The permissible limit of hardness of water fore low pressure boiler is _____

Sterilization is the process of killing ___ of water borne diseases, so as to make it safe for hospital use.

An area is officially declared as drought effected if the mean Annual rain fall is less than of the annual Potential evaporation,

Always flow inside the ground is _____

The resultant pressure of water acting at _____

The resultant pressure of water on the face of dam is equal to _____

A dam which the up lift pressure of the sub-soil water by its own weight is called ___

The steep conduits made in the body of dam for running turbines to generate hydro-electric power are called_____

To dispose of the surplus water from dam, a water way is constructed called

When reservoir is full on upstream side, the maximum stress comes upon_____

In case of silt deposition in the dam reservoir to dispose of the effectively ___be used

The largest dam in Pakistan constructed is _____

The dam constructed on Korang river is called ____

The dam built for the purpose of diverting water from main stream to various courses of flow is called _____

Tanda dam is constructed on river ____

Water application efficiency increases if the plot to be irrigated is____

Water storage efficiency in the root zone depends upon______

Water available above the top of root zone of plants is about 15% of soil moisture contents, is mostly not available to plants celled____

Water available in root zone of plants, is about 50% of soil moisture content. which is always available to the plants is called

Wilting point is that limit after that the crop starts feeding up and no water is available for plant, this point occurs after _____

Readily available moisture is the % of moisture that is always easily available to plant and this moisture is called _____

Estimated quantity of global water is ____which covers about 70% of earth

____% of total global water is saline and available in oceans.

____% of total global water is fresh and its major portion is obtained from Rains.

An aquifer in which water contained under high pressure as the’ aquifer is sand witched between two impervious layer is called______

The property of soil which indicates the volume of water stored in the formation is called ______

Volume of water that unit volume of aquifer will give up by gravity pull is called

The property of saturated soil mass which transmits appreciable quantities . water is called______

The piezometric level of water in the well at zero discharges is called______

The discharge of a well per unit draw down usually expressed as gallons or liters per minute is called _______

In study of a granular material sliding on plane ground, the angle between the perpendicular and the surface in static condition is called _____

Ground water moving down wards in the un-saturated ground above the water table is called_______

The fixing of points in such away or the ground to have a correct lines for setting a canal or water course is called ______

To protect the face of embankment against the attack of wave wash with stone boulders is called ______

That part of the flow in a stream comes from sub-soil or valley, may be beneath the top surface of channel bed is called_______

The mass per unit volume of a liquid at standard temperature and pressure is called ______

The ratio of specific weight of any liquid to the specific weight of water is called as _____

The experiment of capillary rise is performed in a glass tube of smaller diameter, because________

The weight per unit of liquid at standard Temperature and pressure is called_______

The mercury in a glass tube assumes convex shape at the top because of.

The falling drop of rainwater become spherical due to

The property of liquid which controls its rate of flow is called _____

Piezometer tube is open to both ends mostly used to measure____

The water force per meter length on a vertical wall is equal to

The stability of a dam is checked for its ________

When ever a body is immersed wholly or partially in water, it is lifted up by a force equal to the weight of water displaced by the body.

A flow in which velocity of water particles is same at all sections is called ______

A flow in which the quantity of liquid flowing per second is constant is called

Flow in which each liquid particle has a definite path is called _____

A flow in which the stream lines may be represented by a straight line is called_______

For a perfect incompressible liquid flowing in a continuous stream, the total energy of a particle remain the same, while the liquid particle move from one point to another this statement is called _______

Theoretical velocity of the jet at Vena Contracta is determined by _____

The discharge over a rectangular notch is determined by ______

The loss of head due to friction according to Darcy’s formula is ________

The hydraulic mean depth for a circular pipe of diameter d is _______

The total energy line lies over the hydraulic gradient line by an amount equal to

According to Chezy’s formula, the discharge through an open channel is equal to _______

A channel is said lo be of most economical cross section, for a given cross-sectional area and bed slope when it _____

The discharge through a rectangular channel will be maximum. if its depth is

in most economical Trapezoidal section, half of the Top width is equal to _____

The depth of water in a channel, corresponding to minimum specific energy is called _____

if the depth of water in an open channel is greater than the critical depth, the flow is called_____

A hydraulic jump to dissipate energy when flow is _____

Art of growing crops, management of live stocks, husbandry and farming is called

Art of mixing saline water with fresh water in accordance with some ratio for irrigation purpose is called _____

Art of making saline un-cultivable lands capable of re-cultivation is called._____

Art of making saline water fit for irrigation and drinking through the processes of membrane technique and reverse osmosis is called _________

Which of the following is a cash crop ____

Presently percentage of area irrigation to that of total cultivated area in our country is _____

Out/ of a well water is more than canal water because______

The hydraulic structures like dams, barrages constructed on permeable foundations are likely to fail due to ______

A watershed canal ____

The meandering pattern of a river is developed by _____

The process of consolidation of stabilized earth work in canal or river embankments. In this process the soil is deposited in layers of specified thickness and at a particular moisture content is called ________

For a flood control reservoirs, the effective storage is equal to ________

When the reservoir is full, the maximum compressive force in a gravity dam is produced _______

When the fluid properties do not change with time, it is a _____ flow

The ideal crop for wastewater or sewage irrigation is _________

The precipitation that falls during the growing season of the crop is called

The season that starts from 1^st October and ends on 31^st March, runs for 182 days is called ________

The season that starts from

1^st

April and end on

30^th

September and run for 183 days is called ______

Weep holes are provided in canal lining to _______

The flow in the river due to the floods may be classified as ________

Development of______in river is due to meandering.

An impermeable Formation which neither contains water nor transmits water may be called_________

Rabi crops pertains to ________

The delta the total depth of water consumed by a crop from

1^st

watering when matures, the delta for rice is

The delta the total depth of water consumed by crop up to its maturity, the delta of cotton is _______

The delta the total water requirement of crop from the time of sowing to harvesting the delta of sugarcane is ______

The delta the total water depth required by a crop up to its maturity the delta of wheat is ________

Sliding failure occurs in a solid gravity dam when_____

The disposal of sewage by allowing it to flow and Soak into specially leveled farm land for cultivation purpose is called _______

Sediment particles smaller than 0.002 mm which do not settle in water are called_______

The quantity of water lost by transpiration from the plants or crops and evaporation from fields adjacent to these plants is called _______

An engineer who is approached by a client for the purpose of design of hydraulic structures like dam. Barrage or Regulator is called _______

A line shown on a map, drawn between the points of equal levels or heads is called_______

A line shown on a contour map, set out on ground between certain constant points of slope is called_____

A reference point on the ground of accurately known position which is a () point of leveling is called _____

Cultivation made on small plane steps because of more steepness of the area is called ______

The piles driven in low bearing capacity soil which does not rest on hard rock but bears the coming load due to side resistance is called ____

The law that states that the discharge of sub-soil water is directly proportional to the loss of head and the area of soil sample and inversely proportional to to the length of soil sample ________

The percentage of the volume of water filled in voids to the total volume of solids of soil grains is called______

The contour of equal water heads and pressure in the soil mass beneath retaining structure are called_______

The free distance on the paddy surface which a wind can travel to any point to rise waves is called______

The minimum moisture content at which a water drop if placed on a smooth surface of soil will not be absorbed immediately by the soil is called _______

The line in a flow net which shows the direction of flow of water through a soil mass beneath dam are called _______

The height from the top of the embankment to the normal water level in canal .Dam – Reservoir etc, which allows for small waves to splash without over flow is called_______

A mine or tunnel for collecting seepage water in rock or dam is called ______

A dam which is prevented from overturning by the action of lateral or vertical up thrust of water by its weight is called ______

Mean velocity of flow in a river can be directly measured by means of _________

The formula used to calculate maximum flood discharge for a hilly () is

Direct runoff is the sum of ___

A fluid is a substance that _____

Which of the following has highest-coefficient of discharge_____

Cavitation is caused by _____

Aeration holes are provided to reduce the inside saturation pressure ______

The velocity in a large canal or channel measured at a depth of ______ gives the mean velocity using the current meter

generally useful life of a reservoir is considered terminated when its -gross storage is reduced by ______ of the design capacity of the reservoir

the last length of the river before it falls into the sea is known as ______

The centre of pressure of a plane submerged area which holds it in equilibrium is

The forces coming over the gravity dam is mainly resisted by _______

the phenomenon of evaporation from water surfaces, from soil surfaces around the plants and from plants and transpiration from plants is called _______

The precipitation that occurs because of frontal disturbances during the movement of barometric low pressure is called __________

A plot of graphical representation showing river flow against time is called ________

An instrument used for measuring pressure head, generally made up of a small pipe tapped into the side of conduit is called _______

If the duration of a unit hydrograph approaches zero, the resulting unit hydrograph is called _____

hail is precipitation in the form of balls or lumps of ice of size greater than ____ formed by alternate freezing & melting

Land containing high percentage of alkalies may be reclaimed by addition of_________

The depth of root zone for rice crop is about________

The method of irrigation in which each tree is surrounded by a border to form a pool when water is supplied is called _____

A flow of water for a certain discharge when total energy of flow i.e. sum of potential, kinetic and pressure energies is minimum is called__________

Net irrigation + field irrigation losses are the requirement of _______

The angle between a head regulator and entrance of water, for smooth entry of water in a canal is kept as ______

A structure made near weirs and barrages to facilitate the migration of fish up stream or down stream is called ______

A closed conduct or barrel used used for supplying water under high pressure to a turbine to generate electricity is called _____

The most economical central angle of an arch dam is made at ______

An earth embankment built on one or both sides of a river, some distance away from its banks to control flood is called _____

The ratio of change of discharge of an outlet to the rate of change in level of water surface in distributary at its normal depth is called _________

A pipe flowing full, the liquid particles in the pipe has maximum velocity at ______

The unit of kinetic viscosity is equivalent to _______

The hydraulic gradient line (H.G.L)represents the sum of

Total energy line (T.E.L) represents the sum of _________

velocity of gases is measured with a ______

Friction head loss in open channels is determined by

From a water fall, if water is falling down at the rate of 100 N/sec: on the blades of a turbine when the height of fall is 100 m the power delivered to turbine will be

Torsional force does not act on ______

Mercury does not wet the glass because of its property of ________

The specific weight of water at normal pressure of 760 mm, 4ºC temperature and at mean sea level is ________

A type of flow in which water particles, while moving in the direction of flow, rotate about their mass centre is called ____

Bouyant force is equal to the ______ of liquid displaced by the body in water mass

Permissible velocity of water flowing through concrete lined tunnel is usually ___

The discharge through rectangular channel is maximum when Hydraulic mean depth m is equal to.

The depth of flow at which the energy is maximum is called ______

A structure constructed in channel width having narrow throat and raised floor in bottom, used for measuring discharge is called _________

The value of coefficient of discharge in comparison to cofficient of velocity is found to be _______

That rain fall which is effectively consumed by the plants to meet its consumptive needs is called