551. What is the most social insects__________________?
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A. Termites

B. None of the above

C. Black ants

D. Honeybees
552. A dam which the up lift pressure of the sub-soil water by its own weight is called _________________?
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A. Gravity dam

B. Buttress dam

C. Arch dam

D. Concrete dam

553. velocity of gases is measured with a _____________________?
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A. All are correct

B. Hot wire manometer

C. Hot wire anemometer

D. Barometer

554. Art of growing crops, management of live stocks, husbandry and farming is called________________?
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A. Water management

B. Agriculture

C. all are correct

D. crop farming

555. Mercury does not wet the glass because of its property of ______________________?
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A. Compressibility

B. Viscosity

C. Capillary

D. Surface tension
556. Which of the following is a cash crop ___________________?
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A. Cotton

B. Wheat

C. Paddy

D. Maize

557. The steep conduits made in the body of dam for running turbines to generate hydro-electric power are called__________________?
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A. Tunnels

B. Penstocks

C. Chuttes

D. Weep holes

558. A type of resistance in which a series of different cultivars of the same crop are infested with a series of different insect biotypes of same species show a differentia interaction is known as_________________?
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A. Horizontal resistance

B. Specific resistance

C. Vertical resistance

D. Cross resistance

559. A flow in which velocity of water particles is same at all sections is called ____________________?
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A. Compressible flow

B. Laminar flow

C. Steady flow

D. Uniform flow
560. 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_______________________?
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A. Shooting flow

B. Normal flow

C. Sub-critical flow

D. Critical flow
561. Water available above the top of root zone of plants is about 15% of soil moisture contents, is mostly not available to plants celled_________________?
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A. Capillary water

B. Irrigation water

C. Hygroscopic water

D. Effective water

562. What is DDT__________________?
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A. Dimethory diphenyl,trichloro,ethane

B. Dichloro diphenyl teracholoride

C. None of the Above

D. Dichloro-diphenyl,trichloro,ethane
563. The formula used to calculate maximum flood discharge for a hilly () is_______________?
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A. Dickens formula

B. Ryves formula

C. Inglis formula

D. Nawab Jung Bahadur All formula
564. Syrphid flies have type of larvae________________?
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A. vermiform

B. Carabiform

C. Platy form

D. Eruiform

565. Function of epiculticle in insect is__________________?
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A. Impermeability of water and prevent evaporation

B. Impermeability of water

C. Prevent evaporation

D. Rigidly of body parts

566. Permissible velocity of water flowing through concrete lined tunnel is usually __________________?
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A. 3 4m/sec

B. 6 7m/sec

C. 4 5m/sec

D. 5 6m/sec

567. Always flow inside the ground is ____________________?
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A. Turbulent

B. Laminar

C. Compressible

D. Rotational

568. Type of pheromone which get together the insects for food and mating is known as________________?
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A. Trial marking pheromone

B. Aggregation pheromone

C. Alarm pheromone

D. Sex pheromone

569. A pipe flowing full, the liquid particles in the pipe has maximum velocity at __________________?
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A. All are correct

B. Top of pipe

C. Centre of pipe

D. Bottom of pipe

570. The velocity in a large canal or channel measured at a depth of ___________________ gives the mean velocity using the current meter?
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A. 0.5 depth

B. 0.5m

C. 0.6 depth

D. 0.6m

571. A substance that destructive to nerve tissue is called____________________?
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A. Swath

B. Neurotoxin

C. Toxicant

D. Drift

572. Beetles, weevils, earwigs. have fore wing very thick and hard structure is__________________?
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A. Halteres

B. Stripy

C. Elytra

D. Hemelytra

573. 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__________________?
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A. Base flow

B. Ground flow

C. All are correct

D. Sub-surface flow

574. The pesticide does not allow larval insect pest to moult further is called_________________?
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A. Fumigants

B. Protectant

C. Insect growth regular

D. Sterilant

575. Zinc phosphide is____________________?
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A. Pesticide

B. Rodenticide

C. Weedicide

D. Insecticide

576. An earth embankment built on one or both sides of a river, some distance away from its banks to control flood is called _______________?
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A. Dyke

B. Marginal embankment

C. Embankment

D. Flood protective bund

577. The law which states that the intensity of pressure at any point in a liquid at rest is same in all directions_________________?
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A. None

B. Pascals law

C. Darcys law

D. Archimeds law

578. A substance used in a pesticide, it helps the spray material to adhere to the sprayed surface is called_________________?
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A. Adjuvant

B. Agitation

C. Activator

D. Adhesive
579. A dam which is prevented from overturning by the action of lateral or vertical up thrust of water by its weight is called __________________?
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A. Buttress dam

B. Arch dam

C. Gravity dam

D. Coffer dam

580. Commercial production of silk is called_________________?
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A. Sericulture

B. Lac culture

C. Floriculture

D. Apiculture

581. The bees are not reared for commercial purpose are called_________________?
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A. Wild bees

B. Domestic bees

C. Wild bees

D. None of the above

582. A chemical or secretions which are thrown outside the body for transmitting message to the individual of same species is_________________?
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A. Ecdysone

B. Hormone

C. Pheromone

D. Juvinile Hormone

583. The depth of flow at which the energy is maximum is called ____________________?
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A. Super critical depth

B. Critical depth

C. All are correct

D. Sub-critical depth

584. The delta the total depth of water consumed by a crop from 1st watering when matures, the delta for rice is___________________?
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A. 120cm

B. 100cm

C. 80cm

D. 75cm

585. Death of an insect from a single dose is called__________________?
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A. Defoliant

B. Chronic poisoning

C. Acute poisoning

D. Bait

586. For safe application of pesticide which things are required ?
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A. Head cores

B. Overall,gloves

C. All of above

D. Goggles, respirator

587. When the reservoir is full, the maximum compressive force in a gravity dam is produced ___________________?
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A. Within the middle third of base

B. At centre of base

C. At the heel

D. At the toe
588. The width of the area treated in one pass by a sprayer or other applicator is called___________________?
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A. Swath

B. Drift

C. Aerosol

D. Toxin

589. What is antidote__________________?
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A. Treatment given to counteract the effects of a poison

B. None of the Above

C. Increase the effects of a poison

D. No action against pesticide

590. What KD50____________________?
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A. Low knock down

B. Medium knock down

C. None of above

D. Highly knock down

591. The total energy line lies over the hydraulic gradient line by an amount equal to________________?
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A. v2/g

B. v/g

C. v2/2g

D. v/2g

592. It is a substance added to a pesticide to impure the qualities of pesticide formulation is called_________________?
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A. Adjuvant

B. Agitation

C. Synergism

D. Activator

593. The living organism that live in or on the bodies of other living organisms from which they get their food, during at least one stage of their existence is called________________?
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A. Prey

B. Parasitism

C. Parasites

D. Predator

594. Propagation and release of sterile incompatible individuals is done in pest population is called__________________?
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A. Chemical control

B. Genetic control

C. Physical control

D. Regularity control

595. A channel is said lo be of most economical cross section, for a given cross-sectional area and bed slope when it __________________?
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A. All of these

B. Involves lesser excavation

C. Has minimum wetted perimeter

D. Gives max. Discharge

596. The insect skeleton is composed of series of plates called__________________?
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A. Conjunctivae

B. Somites

C. Sutures

D. Sclerites
597. The falling drop of rainwater become spherical due to _________________?
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A. None of these

B. Capillary

C. Surface Tension

D. Compressibility

598. Volume of water that unit volume of aquifer will give up by gravity pull is called ____________________?
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A. Specific retention

B. Specific yield

C. All are correct

D. Specific volume

599. Sliding failure occurs in a solid gravity dam when____________________?
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A. Resultant of all forces cuts the base of the dam out side the toe

B. Shear friction factor Is less than 1.5

C. Resultant of all forces cuts the base at the inner middle third point

D. Ratio of over turning moments exceeds than unity

600. A channel artificially constructed for water conveyance of appreciable quantities with no problem of silting and scouring is called ____________________?
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A. A and B are correct

B. Alluvial canal

C. A regime canal

D. Stable canal