agriculture MCQs – Page 28

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

541. A fluid is a substance that ____________________?
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A. Can not be subjected to shear force

B. Can not remain at rest under the action of any shear force

C. Always expands until it fills any container

D. Is partially incompressible

542. The insect which Parasitizes one species of host is called__________________?
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A. Permanent Parasite

B. Transitory Parasite

C. Obligated Parasite

D. Intermitted Parasite

543. A chemical which inhibits clotting mechanisms of the blood is called __________________?
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A. Bait

B. Acute poisoning

C. Defoliant

D. Chronic poisoning
544. The concentration of a toxicant that kills 50% of the exposed organism is called_________________?
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A. None of the Above

B. LD<sub>75</sub>

C. LC50

D. LD<sub>50</sub>

545. In case of silt deposition in the dam reservoir to dispose of the effectively ________________ be used?
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A. Silt ejectors

B. Silt excluders

C. All are correct

D. Vortex pipes
546. Population prediction of a particular species with in the field is called____________________?
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A. Haemospora

B. Fore casting

C. Surveillance

D. Pest scouting

547. Against sucking and chewing insect pest we apply___________________?
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A. Endosulfan, Deltamethrin, Dimethoate

B. Monocrotophos, Diazinon, Profenophos

C. Cypermethrin, Permethrin,Malathion

D. All the above
548. The quality a of a pesticide to remain as an effective residue because of its low volatility and chemical stability is termed as__________________?
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A. Desiccant

B. Persistence

C. Aerosol

D. Defoliant

549. Which families are most of them are scavenger ?
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A. Pyralidae

B. Tineidae and Pyralidae

C. Culicidae

D. Tineidae

550. The hydraulic gradient line (H.G.L)represents the sum of_________________?
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A. Water surface

B. Pressure head + datum head

C. Pressure head + velocity head

D. Velocity head

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