agriculture MCQs – Page 195

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 Review each marked answer and report any item that may be outdated or unclear.

3881. The ability of a plant by means of which it is less damaged by insects is________________?
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A. Tolerance

B. Plant resistance

C. Resistance

D. Pest avoidance

3882. The body of an insect is covered by a protective __________________ formed from chitin and protein. Depending upon its precise composition and thickness, the cuticle may be soft and flexible or hard and rigid; according to requirements, it may or may not be permeable or waterproof:
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A. Six- layered skin (cuticle)

B. None of the above

C. three-layered skin (cuticle)

D. Two-layered skin (cuticle)

3883. What is function of deterrent__________________?
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A. Chemical which prevent feeding

B. None of the above

C. Prevent feeding and oviposition of an insect

D. Prevent ovipositon of an insect

3884. What is the family of mosquito________________?
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A. Tineidae

B. Pyralidae

C. Bombicidae

D. Culicidae
3885. The concentration of a toxicant that kills 50% of the exposed organism is called_________________?
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A. LC50

B. LD<sub>50</sub>

C. LD<sub>75</sub>

D. None of the Above

3886. Cotesia flavipers is endo larval parasite of_________________?
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A. Sugarcane black borer

B. Sugarcane stem borer

C. Sugarcane root borer

D. Sugarcane top borer

3887. A level of resistance show by a cultivar is similar against all insect biotype such type of resistance is__________________?
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A. General resistance

B. Cross resistance

C. Specific resistance

D. Vertical resistance

3888. Example of inorganic pesticides are__________________?
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A. calcium cyanide, boric acid

B. Oxygen, sulfur

C. Phosphorus, chlorine

D. Chlorine, nitrogen

3889. Cotton bollworms, sugarcane borers are_________________?
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A. Major pest

B. Minor pest

C. Key pest

D. Secondary pest

3890. The parasites which requires several or different hosts for its complete development is called ?
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A. Heteroxenous parasites

B. Monoxenous parasite

C. Phytophagous parasites

D. Entomophagous parasites

3891. Propagation and release of sterile incompatible individuals is done in pest population is called:____________?
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A. Genetic control

B. both A & B

C. Chemical control

D. None of these

3892. The parasite which are capable of developing upon a few closely related host species is called_______________?
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A. Polyhagous parasites

B. Oligophagous parasites

C. Facultative parasites

D. Transitory parasites

3893. Which of the following is a cash crop ___________________?
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A. Paddy

B. Cotton

C. Wheat

D. Maize

3894. 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?
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A. 0.006

B. 0.0075

C. 0.0056

D. 0.0065

3895. The total energy line lies over the hydraulic gradient line by an amount equal to________________?
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A. v/2g

B. v2/g

C. v2/2g

D. v/g

3896. The contour of equal water heads and pressure in the soil mass beneath retaining structure are called___________________?
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A. Equipotential lines

B. Streak lines

C. Stream lines

D. Equilibrium lines

3897. The steep conduits made in the body of dam for running turbines to generate hydro-electric power are called__________________?
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A. Penstocks

B. Tunnels

C. Chuttes

D. Weep holes

3898. 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 ?
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A. 999

B. 1000

C. 995

D. 990

3899. 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. 75cm

B. 120cm

C. 100cm

D. 80cm

3900. The fixing of points in such away or the ground to have a correct lines for setting a canal or water course is called _________________?
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A. Designing of canal

B. Alignment of canal

C. Lining of canal

D. All are correct