651. According to Blight, the percolating water seeps along the lower contour of the hydraulic structure, the length traversed by this water is called ______________________?
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A. Piping

B. Undermining

C. Seeping length

D. Creep length
652. Mean velocity of flow in a river can be directly measured by means of ______________________?
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A. Surface floats

B. Rod floats

C. Dicknes formula

D. Current meter

653. when ever a sloping face of river bank is protected by stone pitching against scour, the pitching is extended beyond the toe to the river side that is called__________________?
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A. Guide bank

B. Launching apron

C. Protective wall

D. Toe wall

654. Certification is not required for________________?
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A. Nucleus seed

B. Breeder seed

C. Certified seed

D. Foundation seed

655. The mercury in a glass tube assumes convex shape at the top because of_________________________?
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A. Surface Tension

B. Viscosity

C. Cohesion

D. Adhesion

656. The various works constructed on river side to control the flow and pass it safely from hydraulic structures are called ___________________?
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A. Marginal Embankment

B. River Training works

C. River controlling works

D. Guide Banks

657. Cotton plant has a mode of germination______________?
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A. Hypogeal germination

B. Epigeal germination

C. Both of the above

D. non of these

658. Art of mixing saline water with fresh water in accordance with some ratio for irrigation purpose is called _________________?
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A. Desalinization

B. Mixing of water

C. Amalgamation

D. All are correct

659. Canals normally excavated directly from river without head regulator is called___________________?
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A. Inundation canals

B. Perennial canals

C. Water shed canals

D. Non-perennial canals

660. The line in a flow net which shows the direction of flow of water through a soil mass beneath dam are called _________________?
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A. Streak lines

B. Equipotential lines

C. flow lines

D. Section lines

661. Best time of sowing for cotton is______________?
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A. Mid June to mid July

B. non of these

C. Mid March to mid April

D. Mid May to mid July
662. Gassypium hirsutum was developed from a cross between________________?
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A. G.arbarieum and G.herbaceum

B. G.arbarieum and G. rainmundii

C. G.arbarieum and G.thurberii

D. G.arbarieum and G.barbadense

663. The branch of Science which deals cultivation of land is called________________?
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A. Geology

B. Agriculture

C. Horticulture

D. Petrology

664. Total energy line (T.E.L) represents the sum of ________________________?
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A. Velocity head + potential head + datum head

B. Pressure head + kinetic head and datum head

C. Velocity head + kinetic head + datum head

D. The energy head + potential head + datum head

665. the ratio between the rate of change of discharge of the out let to the rate of change of discharge of the distributary is called ______________________?
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A. Proportionally

B. Sensitivity

C. flexibility

D. Flow abili

666. When the weight of weir balances the up lift pressure caused by the head of the water seeping below the weir bed is called ___________________?
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A. Broad crested weir

B. Gravity weir

C. Non-gravity weir

D. Cippollite weir

667. A fish ladder is device by which flow energy can be dissipated in such a manner as to provide easy access to the downstream fish to come on upstream side, the velocity of flow varies from___________________?
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A. 2.0 2.5 m/sec

B. 3.5 4.0 m/sec

C. 2.5 3 m/sec

D. 3.0 3.5 m/sec
668. A cloud is formed due to condensation. it consists of a small particle of ice an. small droplets of water, having diameter about ___________microns?
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A. 30

B. 40

C. 35

D. 45

669. The difference between saturation vapour pressure and actual vapour pressure at a constant temperature is called ___________________?
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A. Saturation vapour pressure

B. Saturation deficit

C. Actual vapour pressure

D. Partial pressure

670. The floods which exceeds the designed magnitude of a reservoir is called _______________________?
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A. High floods

B. Storm flood

C. Intensive flood

D. Standard protects flood
671. Gassypium herbaceum was originated in______________?
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A. Kenya and South Africa

B. South Mexico and Central America

C. Indonesia and Central America

D. Ethipia and South Africa

672. A series of vertical steps in a stream made to avoid soil scouring is called ___________________?
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A. Embankment

B. Levees

C. Cascades

D. Banks

673. For an economical design of gravity dam, the shear friction factor causec compression strength should lie between____________________?
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A. 3 to 5

B. 2.0 to 4.0

C. 1.5 to 4.0

D. 2.5 to 4.5

674. The ratio between the force causing a body to slide along a plane and the force normal to the plane is called __________________?
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A. Coefficient of resistance

B. All are correct

C. Coefficient of friction

D. Coefficient of internal friction

675. The water way from a weir is determined by using Laceys wetted perimeter i.e. P=_______(Q)1/2 ?
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A. 5.75

B. 3.5

C. 4.75

D. 3.75

676. The significant damage to crop generally occurs when capillary meniscus reaches permanent wilting point known as _______________?
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A. Equivalent moisture

B. Hygroscopic moisture

C. A and B

D. Unavailable moisture

677. The losses of irrigation water due to the seepage but That. does not join the under ground reservoir is called __________________?
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A. Evaporation losses

B. Seepage losses

C. Absorption losses

D. Percolation losses

678. When FSL of the canal is sufficiently above the bed level of drainage so that canal flows under syphonis action, the structure is called _____________________?
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A. Canal-syphon

B. Super passage

C. Syphon Aqueduct

D. Aqueduct

679. The water level required on the upstream side of a canal head regulator, so as to feed the off-taking canal with its full supply is called_________________?
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A. Canal level

B. FSL

C. HFL

D. Pond level
680. The total length of impervious floor on down stream of the hydraulic structure is determined by Blighs Theory__________________?
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A. Lane

B. Darcy

C. Khosla

D. All are correct

681. A particular flood which can occur in the basin in the worst meteorological and hydrological conditions is called ___________________?
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A. Maximum probable flood

B. Storm water flood

C. Very high flood

D. Standard flood

682. Botanical name of American cotton is_________________?
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A. G. hirsutum

B. G. arborium

C. G. barb dense

D. Non of these

683. The hydraulic structures like dams, barrages constructed on permeable foundations are likely to fail due to ___________________?
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A. All the above

B. Sliding

C. Piping

D. Crushing

684. According to Mr. Khosla, the seeping water creates undermining and the undermining starts from__________________?
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A. Bottom to top

B. Up stream to down stream

C. Top to bottom

D. Down stream to up stream
685. The hydraulic jump is formed on down stream of toe of glacis for the purpose to dissipate surplus energy of the flowing water, the nature and strength of jump depends upon a Number called______________________?
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A. Darcy,s law

B. Froude No

C. Reynolds

D. Webber

686. The mass per unit volume of a liquid at standard temperature and pressure is called ____________________?
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A. Specific weight

B. Specific gravity

C. Mass density

D. None of these

687. Barani Agriculture institute is located at _________________?
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A. Islamabad

B. Rawalpindi

C. Chakwal

D. Peshawar

688. A structure provided when a large canal a big drainage channel approach other practically at the same level is called__________________?
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A. Drainage crossing

B. Level crossing

C. Canal crossing

D. Super passage

689. If a river or stream is collecting sediment and is building up dunes in its bed is called ______________________?
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A. Aggrading river

B. Sediment river

C. Stable river

D. Sub-stable river

690. Which of the following has highest-coefficient of discharge_____________________?
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A. Cippoletti weir

B. Venturi meter

C. Broad crested weir

D. Sharp edged orifice

691. The specific weight of water at normal pressure of 760 mm, 4C temperature and at mean sea level is ______________________?
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A. 1020kg/m3

B. 1000ka/m3

C. 1100kg/m3

D. 960kg/m3

692. Water logging caused by ____________ water, which during excessive irrigation percolates down and join under ground water table?
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A. Free

B. Hygroscopic

C. Gravity

D. Capillary

693. At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?
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A. Balanced exit gradient

B. Submerged exit gradient

C. All are correct

D. Critical exit gradient
694. 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 ?
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A. Law of gravity

B. Newtons law of otion

C. Archimeds Principle

D. None of these

695. Mostly the hydraulic structures founded on ____________ soils fails because of undermining and uplift pressure?
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A. Stable

B. Rocky

C. Impermeable

D. Permeable
696. Weedicides that kill the foliage of weeds by direct contact are as________________?
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A. Bromoxy nil

B. Loxynil

C. Paraquet

D. Trifluration

697. The experimental design which control fertility level in two directions is known as________________?
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A. SPD

B. LSD

C. RBD

D. AD

698. The force with which the distinct bodies held together when their surfaces are brought in contact to each other is called _________________?
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A. Adhesion

B. Surface tension

C. Cohesion

D. All are correct

699. The loss of head H/ L is proportional to the length of creep. There fore the loss of head per unit creep length is called ______________________?
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A. Hydraulic gradient

B. Head loss

C. Exit gradient

D. Creep length

700. The structures, which are constructed on the river bed upstream of head regulator. With this clear water enters in canal such structures are called______________________?
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A. Silt control structures

B. Vortex pipes

C. Silt ejectors

D. Silt excluders