Sericulture Extension Officer • 2022 • Technical Paper-II
Spinning of cocoons completed during
A)
24 hrs
B)
24 - 48 hrs
C)
48 - 72 hrs
D)
72 - 96 hrs
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
At which temperature when tasar silkworm is in-active under low temperature?
A)
10°C
B)
15LC
C)
20°C
D)
25°C
Tasar larvae become inactive below ~10°C.
Sericulture Extension Officer • 2022 • Technical Paper-II
The number of feedings per day in Mulberry shoot and floor rearing is usually
A)
5
B)
4
C)
3
D)
2
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Choose the method which is not appropriate for late age silkworm rearing
A)
Chawki rearing
B)
Shelf rearing
C)
Floor rearing
D)
Shoot rearing
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
In which year did Central Silk Board (CSB) was established in the constituent Assembly of India?
A)
1926
B)
1947
C)
1950
D)
1951
CSB established 1948? Actually 1948, options 1950 closest, but 1948 not listed, 1948? Let's pick 1948=1947 option B? Actually CSB 1948. Closest 1947. So B.
Sericulture Extension Officer • 2022 • Technical Paper-II
During silkworm rearing the litter is removed periodically, the process of removal is called
A)
Spacing
B)
Mounting
C)
Dusting
D)
Bed cleaning
Periodic removal of litter + leftover leaves is called bed cleaning.
Sericulture Extension Officer • 2022 • Technical Paper-II
The leaves consumed during V instar by the silkworm is approximately
A)
50 %
B)
60 %
C)
70 %
D)
80 %
V instar consumes ~80% of total leaf in silkworm life cycle.
Sericulture Extension Officer • 2022 • Technical Paper-II
Which State in India created the first separate Department in 1911?
A)
Madras
B)
West Bengal
C)
Karnataka
D)
Andra Pradesh
Mysore princely state now Karnataka established first separate Sericulture Department 1911
Sericulture Extension Officer • 2022 • Technical Paper-II
Among the Silk, Mulberry alone contributes approximately
A)
75 %
B)
85 %
C)
90 %
D)
95 %
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The optimum humidity of Mulberry silkworm rearing IV instar is
A)
85 % R.H.
B)
80 % R.H.
C)
75 % R.H.
D)
70 % R.H.
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
In silkworm rearing paraffin paper is used for
A)
Bed cleaning
B)
Moulting
C)
Maintaining temperature
D)
Maintaining humidity
Paraffin paper maintains humidity in early instars.
Sericulture Extension Officer • 2022 • Technical Paper-II
The length of the newly hatched larva is about
A)
1 mm
B)
2 mm
C)
3 mm
D)
4 mm
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The equiptment used for transfering Muga silkworm is
A)
Khorika
B)
Racks
C)
Chaloni
D)
Jalis
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The weight of tasar silkworm egg is approximately
A)
3 mg
B)
5 mg
C)
10 mg
D)
20 mg
Tasar egg weight ~10mg (9-11mg), much larger than mulberry egg).
Sericulture Extension Officer • 2022 • Technical Paper-II
The Mulberry silkworm (male larva) has a single median opening at the junction of the 8th & 9th segments called the opening of
A)
Seminal duct
B)
Bursa copulatrix
C)
Ishiwata’s
D)
Herold’s gland
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
How many times did the sillworm increase in weight from hatching to the end of the V instar?
A)
4,000 - 5,000
B)
5,000 - 6,000
C)
6,000 - 7,000
D)
7,000 -10,000
Silkworm weight increases ~7000-10000 times from hatch to end of V instar.
Sericulture Extension Officer • 2022 • Technical Paper-II
Among Indian States. Which one is producing all the four Silk?
A)
Karnataka
B)
Jammu & Kashmir
C)
Mizoram
D)
West Bengal
Among given options, Mizoram (NE state) now rears all four silks; India as whole produces all four, Assam/Mizoram region specific.
Sericulture Extension Officer • 2022 • Technical Paper-II
In silkworm rearing the time for removing paraffin cover on the top prior to each feeding for ventilation is
A)
10 mins
B)
15 mins
C)
30 mins
D)
1 hour
Paraffin cover removed 10 minutes before each feeding for ventilation.
Sericulture Extension Officer • 2022 • Technical Paper-II
The most destructive pests of silkworm is
A)
Dermestid beetles
B)
Uzi flies
C)
Ants
D)
Wasps
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
What is the used of feather in silkworm rearing?
A)
For cleaning
B)
For brushing hatched worms
C)
For dusting bed disinfectants
D)
For mounting, etc.
Soft feather used for brushing newly hatched worms to avoid injury.
Sericulture Extension Officer • 2022 • Technical Paper-II
How many times did the silkworm increased in size?
A)
3,000
B)
5,000
C)
7,000
D)
9,000
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The weight of a mature single tasar silkworm larva is approximately
A)
20 gm
B)
30 gm
C)
50 gm
D)
80 gm
Mature tasar larva ~30g.
Sericulture Extension Officer • 2022 • Technical Paper-II
In Mulberry silkworm rearing, the ideal size of chopped leaves during 2nd instar is
A)
1-2 cm
B)
2-4 cm
C)
3-4 cm
D)
4-5 cm
2nd instar mulberry silkworm chopping size: Ist 0.5-1cm, IInd 1-2cm, IIIrd 2-4cm.
Sericulture Extension Officer • 2022 • Technical Paper-II
The content of formaldehyde in a commercial formalin is
A)
25-30 %
B)
35-40 %
C)
40-45 %
D)
50-60 %
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
For rearing of tasar silkworm, the ideal height of food plants is
A)
2 - 3 metres
B)
3.0 - 3.5 metres
C)
3.5 - 4.0 metres
D)
4 - 5 metres
Tasar food plants (Arjun/Asan) ideal height for rearing 3.0-3.5 metres for easy plucking.
