Answers of MCQ question from PYQ Paper Sericulture of Semester IV of the years 2021, 2022 & 2023 respectively.
Table of Contents
Sericulture 2021
1. The sericulture industry spread to India from
- a) Korea
- b) Tibet
- c) China
- d) Japan
2. The largest producer of raw silk in the world is
- a) China
- b) Japan
- c) India
- d) All of these
3. The host plant of Tasar silkworm is
- a) Machilus bombycina
- b) Ricinus communis
- c) Terminalia tomentosa
- d) None of these.
4. The largest silk producing state in India is
- a) West Bengal
- b) Andhra Pradesh
- c) Jammu & Kashmir
- d) Karnataka
5. Central Sericulture Research and Training Institute is situated at
- a) Ranchi
- c) Mysore
- b) Assam
- d) West Bengal
6. Which of the following is not the major pest of mulberry?
- a) Uzy fly
- b) Mealy bug
- c) Leaf roller
- d) Cuttworm
7. Silkgland is developed during which stage of silkworm development?
- a) Embryonic stage
- b) Pupal stage
- c) Larval stage
- d) None of these
8. Sericin protein is secreted from which region of the silk gland?
- a) Anterior region
- b) Middle region
- c) Posterior region
- d) None of these
9. Which of the silk protein is soluble in warm water?
- a) Sericin
- b) Fibrion
- c) Both (a) & (b)
- d) None of these
10. Bombyxin in silkworm are produced by
- a) Juvenile hormone
- b) Prothoracic gland
- c) Prothoracicotropic hormone
- d) All of these
11. The optimum temperature and humidity for incubation of silkworm eggs is
- a) 25° C & 80% RH
- b) 27°C & 90% RH
- c) 28°C & 95 % RH
- d) None of these
12. The optimum temperature and humidity for late age rearing is
- a) 23° – 24° C & 70% RH
- b) 25°- 26° C & 80% RH
- c) 27 deg – 28 deg * C & 85% RH
- d) None of these.
13. Pebrine is the_____disease of B.mori.
- a) Viral
- b) Bacterial
- c) Fungal
- d) Protozoan
14. Which of the following is not a type of silk?
- a) Moth Silk
- b) Mooga Silk
- c) Tasar Silk
- d) Mulberry Silk
15. The main protein present in silk filament is
- a) Fibroin
- b) Sericin
- c) Both (a) & (b)
- d) None of the above.
16. Which of the following is not the defective cocoon?
- a) Double cocoons
- b) Stained Cocoon
- c) Flimsy Cocoons
- d) All of these.
17. Late age silkworm rearing is done by
- a) Shoot rearing
- b) Shelf rearing
- c) Floor rearing
- d) All of these.
18. Which is a serious endo-larval parasitoid of the silkworm?
- a) Uzi fly
- b) Nesolynx thymus
- c) Dermestid bettle
- d) None of these.
19. The muga silkworm is specific to
- a) Rajasthan
- b) Tamil Nadu
- c) Jammu & Kashmir
- d) Assam
20. Muga silk is produced by
- a) Antheraea mylitta
- b) Antheraea pernyi
- c) Antheraea royli
- d) Antheraea assamensis
21. The domesticated non-mulberry silkworm is
- a) Eri
- b) Tasar
- c) Muga
- d) All of these.
22. Shortest instar of the silkworm is
- a) 1st instar
- b) 2nd instar
- c) 3rd instar
- d) None of these.
23. The spinning worms prefers
- a) Sharp light
- b) Dim to moderate light
- c) Complete darkness
- d) None of these.
24. The Silkworm, Bombyx mori is
- a) Polyphagous
- b) Monophagous
- c) Oligophagos
- d) None of these.
25. The major share of world raw silk is contributed by
- a) Muga silkworm
- b) Tasar silkworm
- c) Eri silkworm
- d) Mulberry silkworm
Sericulture 2022
1. The silkworm spin cocoon after…?
- a) 2nd moult
- b) 4th moult
- c) 3rd moult
- d) Either (b) or (c)
2. The eri silkworm is–
- a) Multivoltine
- b) Bivoltine
- c) Univoltine
- d) All of the above
3. Mulberry belongs to the family
- a) Poaceae
- b) Moraceae
- c) Fabaceae
- d) None of the above
4. Voltine stands for…?
- a) Silk frequency
- b) Brood frequency
- c) Cocoon frequency
- d) Worm frequency
5. Sericin content in silk fibre is
- a) 75-80%
- b) 65-75%
- c) 25-35%
- d) 20-25%
6. Average diameter of silk fibre is
- a) 15 µm
- b) 20 µm
- c) 25 µm
- d) 35 µm
7. Which of the following is a high yielding Indian variety of mulberry plants?
- a) S-25
- b) S-30
- c) S-35
- d) S-40
8. Average rainfall for mulberry cultivation is
- a) 300-400 mm
- b) 400-600 mm
- c) 600-2500 mm
- d) 600-3000 mm
9. Duration of 3rd instar larva is
- a) 2 days
- b) 3 days
- c) 4 days
- d) 5 days
10. How many ocelli are present in a larva of silk?
- a) 6 pair
- b) 5 pairs
- c) 3 pairs
- d) 2 pairs
11. Cocoon is preserved at–
- a) 20° C and 45% humidity
- b) 25° C and 50% humidity
- c) 30° C and 55% humidity
- d) 27° C and 65% humidity
12. Phyllactinia corylea is responsible for the following disease
- a) Tukra
- b) Powdery Mildew
- c) Leaf spot
- d) Leaf rust
13. Which of the following is an insect pest of mulberry plant?
- a) Cercospora moricola
- b) Empoasca flavescens
- c) Pseudomonas mori
- d) Meloidogyne incognita
14. Brushing is a process
- a) To kill silk worm
- b) To destroy cocoon
- c) To collect ends of silk fibres
- d) To twist silk fibres
15. Central Sericultural Germplasm Resources Centre is occurred in
- a) Berhampur
- b) Kolkata
- c) Ranchi
- d) Hosur
16. Larval septicaemia of silk is caused by-
- a) Streptococcus sp.
- b) Serratia marcescans
- c) Odontotermes sp.
- d) Sinoxylon pubens
17. Exotic species of silk worm is
- a) Bombyx mori
- b) Antheraea mylitta
- c) Antheraea yamamai
- d) Antheraea assamensis
18. Which of the following is not a silk pigment?
- a) Xanthophyll
- b) Keratin
- c) Bombycina
- d) Rhodopsin
19. Hyphae and aerial hyphae are observed in larval disease which is caused by
- a) Isaria farinosa
- b) Bacillus thuringiensis
- c) Aspergillus flavus
- d) Beauveria bassiana
20. The common name of Antheraea paphia is
- a) Muga silkworm
- b) Eri silkworm
- c) Tasar silkworm
- d) Oak silkworm
21. Which of the following silk is produced only in India?
- a) Muga silk
- b) Eri silk
- c) Tasar silk
- d) Oak silk
22. Single female of Bombyx mori may lays about:
- a) 400 eggs
- b) 200 eggs
- c) 100 eggs
- d) 50 eggs
23. The maximum number of cocoons cut by single Nagahara machine is about:
- a) 2,000-5,000
- b) 5,000-10,000
- c) 10,000-15,000
- d) 20,000-25,000
24. Stifling is related with:
- a) Sericulture
- b) Apiculture
- c) Lac culture
- d) Fish culture
25. Head quarter of Central Silk Board is
- a) New Delhi
- b) Bangalore
- c) Chennai
- d) Kolkata
Sericulture 2023
1. The Silk Route was a network of trade routes that connected:
- a) Europe and Asia
- b) North America and South America
- c) Africa and Europe
- d) Asia and Africa
2. Which of the following is not a method of rearing silkworms?
- a) Tray method
- b) Pit method
- c) Mount method
- d) Box method
3. The process of separating the silk thread from the cocoon is called:
- a) Weaving
- b) Spinning
- c) Reeling
- d) Knitting
4. The ideal humidity level for silkworm rearing is:
- a) 30-40%
- b) 50-60%
- c) 70-80%
- d) 90-100%
5. Which of the following is not a disease that affects silkworms?
- a) Pebrine
- b) Flacherie
- c) Dengue
- d) Grasserie
6. Which of the following is not a characteristic of a good rearing house?
- a) Good ventilation
- b) Adequate lighting
- c) High humidity
- d) Cleanliness
7. The largest silk-producing country in the world is:
- a) India
- b) China
- c) Japan
- d) Italy
8. The process of dyeing silk is called:
- a) Spinning
- b) Weaving
- c) Reeling
- d) Dyeing
9. The silk fibers produced by the muga silkworm is:
- a) White
- b) Yellow
- c) Red
- d) Green
10. Which of the following is not a method of silk weaving?
- a) Handloom weaving
- b) Powerloom weaving
- c) Jacquard weaving
- d) Crochet weaving
11. Which of the following is not a factor that affects silk production?
- a) Climate
- b) Soil quality
- c) Water availability
- d) Solar radiation
12. The process of silk weaving involves:
- a) Spinning the silk fibers
- b) Dyeing the silk fibers
- c) Reeling the silk fibers
- d) Interlacing the silk fibers
13. Which of the following countries is not a major producer of silk?
- a) India
- b) China
- c) Brazil
- d) Japan
14. The present status of sericulture in India is:
- a) Declining
- b) Stable
- c) Growing
- d) Non-existent
15. Mulberry and non-mulberry silks are differentiated based on:
- a) The type of silkworm used
- b) The colour of the silk
- c) The texture of the silk
- d) The location where the silk is produced
16. The silk is a filament.
- a) continuous
- b) discontinuous
- c) fragmented
- d) thick
17. The silk solidifies when it contacts with –
- a) air
- b) water
- c) sun-heat
- d) stream
18. Pebrine disease caused by
- a) bacteria
- b) protozoa
- c) fungi
- d) virus
19. What is the ideal temperature for rearing silkworms?
- a) 10°-15°C
- b) 20°-25°C
- c) 30° -35°C
- d) 40°-45°C
20. Muga silk found in
- a) West Bengal
- b) Assam
- c) Karnataka
- d) Tamil Nadu
21. What is the phylum of Silkworm?
- a) arthropoda
- b) chordata
- c) protozoa
- d) ctenophora
22. What is the process of degumming?
- a) boiling of silk cocoon
- b) use of chemical agent
- c) process of stifling
- d) all of the above
23. Which one of the following produces silk?
- a) Bombyx sp.
- b) Damselfly
- c) Bombis indica
- d) Dragonfly
24. Workers in the wool industry are more likely to have any of the following diseases
- a) Influenza
- b) Malaria
- c) star disease
- d) Ringworm
25. Silk contain
- a) Only sericin
- b) Only fibroin
- c) Only resin
- d) Fibroin and sericin