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Latest BTSC Fisheries Extension Officer Exam Question (Objective Questions), MCQ in English

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Question Bank BTSC Fisheries Extension Officer Exam - English
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Concerned Subject

Question 1Single Answer
Rohu belongs to the family:
  1. A
    Cyprinidae
  2. B
    Clariidae
  3. C
    Cichlidae
  4. D
    Channidae
Question 2Single Answer
The scientific name of rohu is:
  1. A
    Catla catla
  2. B
    Labeo rohita
  3. C
    Cirrhinus mrigala
  4. D
    Labeo calbasu
Question 3Single Answer
Catla is scientifically known as:
  1. A
    Labeo catla
  2. B
    Catla catla
  3. C
    Cirrhinus catla
  4. D
    Cyprinus catla
Question 4Single Answer
Mrigal is scientifically known as:
  1. A
    Cirrhinus mrigala
  2. B
    Labeo mrigala
  3. C
    Catla mrigala
  4. D
    Cyprinus mrigala
Question 5Single Answer
Which is an Indian major carp?
  1. A
    Common carp
  2. B
    Grass carp
  3. C
    Rohu
  4. D
    Silver carp
Question 6Single Answer
Which fish is mainly a surface feeder?
  1. A
    Catla
  2. B
    Mrigal
  3. C
    Common carp
  4. D
    Clarias
Question 7Single Answer
Rohu mainly feeds in the:
  1. A
    Column zone
  2. B
    Surface zone
  3. C
    Pond bottom only
  4. D
    Shoreline only
Question 8Single Answer
Mrigal is primarily a:
  1. A
    Surface feeder
  2. B
    Column feeder
  3. C
    Aerial feeder
  4. D
    Bottom feeder
Question 9Single Answer
Silver carp is primarily a:
  1. A
    Detritus-free carnivore
  2. B
    Mollusc feeder
  3. C
    Piscivore
  4. D
    Phytoplankton feeder
Question 10Single Answer
Grass carp mainly feeds on:
  1. A
    Zooplankton
  2. B
    Molluscs
  3. C
    Fish larvae
  4. D
    Aquatic vegetation
Question 11Single Answer
Common carp is scientifically known as:
  1. A
    Hypophthalmichthys molitrix
  2. B
    Ctenopharyngodon idella
  3. C
    Cyprinus carpio
  4. D
    Labeo rohita
Question 12Single Answer
Grass carp is scientifically known as:
  1. A
    Cyprinus carpio
  2. B
    Ctenopharyngodon idella
  3. C
    Hypophthalmichthys nobilis
  4. D
    Oreochromis mossambicus
Question 13Single Answer
Silver carp is scientifically known as:
  1. A
    Pangasianodon hypophthalmus
  2. B
    Ctenopharyngodon idella
  3. C
    Cyprinus carpio
  4. D
    Hypophthalmichthys molitrix
Question 14Single Answer
Bighead carp is scientifically known as:
  1. A
    Labeo calbasu
  2. B
    Hypophthalmichthys molitrix
  3. C
    Hypophthalmichthys nobilis
  4. D
    Channa striata
Question 15Single Answer
Tilapia belongs to the family:
  1. A
    Cyprinidae
  2. B
    Siluridae
  3. C
    Cichlidae
  4. D
    Channidae
Question 16Single Answer
Nile tilapia is:
  1. A
    Labeo bata
  2. B
    Clarias batrachus
  3. C
    Channa punctata
  4. D
    Oreochromis niloticus
Question 17Single Answer
Magur is scientifically known as:
  1. A
    Heteropneustes fossilis
  2. B
    Clarias batrachus
  3. C
    Wallago attu
  4. D
    Mystus vittatus
Question 18Single Answer
Singhi is:
  1. A
    Clarias batrachus
  2. B
    Pangasius pangasius
  3. C
    Channa marulius
  4. D
    Heteropneustes fossilis
Question 19Single Answer
Murrel or snakehead fishes belong to genus:
  1. A
    Catla
  2. B
    Labeo
  3. C
    Channa
  4. D
    Mystus
Question 20Single Answer
Channa striata is commonly called:
  1. A
    Singhi
  2. B
    Rohu
  3. C
    Grass carp
  4. D
    Striped murrel
Question 21Single Answer
Channa punctata is commonly known as:
  1. A
    Silver carp
  2. B
    Spotted snakehead
  3. C
    Freshwater shark
  4. D
    Mrigal
Question 22Single Answer
Pangasianodon hypophthalmus is popularly cultured as:
  1. A
    Hilsa
  2. B
    Pangasius
  3. C
    Rohu
  4. D
    Mahseer
Question 23Single Answer
The exotic carp introduced mainly for aquatic weed control is:
  1. A
    Grass carp
  2. B
    Common carp
  3. C
    Silver carp
  4. D
    Bighead carp
Question 24Single Answer
Silver carp originated mainly from:
  1. A
    South America
  2. B
    Africa
  3. C
    China
  4. D
    Australia
Question 25Single Answer
Common carp is an example of:
  1. A
    Marine fish
  2. B
    Indian major carp
  3. C
    Exotic carp in India
  4. D
    Anadromous fish
Question 26Single Answer
Composite fish culture uses species having:
  1. A
    Exactly identical feeding niches
  2. B
    Only carnivorous habits
  3. C
    Different feeding niches
  4. D
    Only bottom-feeding habits
Question 27Single Answer
A common six-species combination in composite fish culture includes:
  1. A
    Catla, rohu, mrigal, silver carp, grass carp and common carp
  2. B
    Hilsa, tuna, catla, shark, rohu and prawn
  3. C
    Magur, singhi, shark, tuna, rohu and catla
  4. D
    Only Indian major carps
Question 28Single Answer
Labeo calbasu belongs to:
  1. A
    Cichlidae
  2. B
    Cyprinidae
  3. C
    Mugilidae
  4. D
    Serranidae
Question 29Single Answer
The taxonomic rank immediately below family is generally:
  1. A
    Genus
  2. B
    Class
  3. C
    Order
  4. D
    Phylum
Question 30Single Answer
Binomial nomenclature uses:
  1. A
    Genus and species
  2. B
    Family and order
  3. C
    Class and genus
  4. D
    Phylum and family
Question 31Single Answer
In a scientific name, the genus name begins with:
  1. A
    Lower-case letter
  2. B
    Capital letter
  3. C
    Number
  4. D
    Greek symbol
Question 32Single Answer
The specific epithet in a scientific name normally begins with:
  1. A
    Capital letter
  2. B
    Number
  3. C
    Lower-case letter
  4. D
    Roman numeral
Question 33Single Answer
Taxonomy primarily deals with:
  1. A
    Feed manufacture only
  2. B
    Classification and identification
  3. C
    Pond construction only
  4. D
    Fish marketing only
Question 34Single Answer
The basic unit of biological classification is:
  1. A
    Species
  2. B
    Family
  3. C
    Order
  4. D
    Class
Question 35Single Answer
Fishes with a bony skeleton belong mainly to:
  1. A
    Crustacea
  2. B
    Chondrichthyes
  3. C
    Osteichthyes
  4. D
    Mollusca
Question 36Single Answer
Sharks and rays possess mainly a:
  1. A
    Bony skeleton
  2. B
    Cartilaginous skeleton
  3. C
    Calcareous shell
  4. D
    Chitinous exoskeleton
Question 37Single Answer
Chondrichthyes includes:
  1. A
    Carps
  2. B
    Mussels
  3. C
    Prawns
  4. D
    Sharks and rays
Question 38Single Answer
Cycloid scales are common in many:
  1. A
    Sharks
  2. B
    Carps
  3. C
    Crabs
  4. D
    Prawns
Question 39Single Answer
Placoid scales occur in:
  1. A
    Tilapia
  2. B
    Rohu
  3. C
    Catla
  4. D
    Sharks
Question 40Single Answer
Ctenoid scales characteristically possess:
  1. A
    Chitin
  2. B
    Comb-like posterior projections
  3. C
    Calcium-free membrane
  4. D
    Poison glands
Question 41Single Answer
Ganoid scales are typically:
  1. A
    Restricted to prawns
  2. B
    Soft and feather-like
  3. C
    Absent in all fishes
  4. D
    Diamond-shaped and hard
Question 42Single Answer
Barbels are especially useful for:
  1. A
    Air breathing only
  2. B
    Flight
  3. C
    Shell formation
  4. D
    Tactile and chemical sensation
Question 43Single Answer
The lateral line of fish detects:
  1. A
    Blood glucose
  2. B
    Water vibrations
  3. C
    Atmospheric ozone
  4. D
    Ultraviolet radiation only
Question 44Single Answer
The operculum primarily covers the:
  1. A
    Heart
  2. B
    Gills
  3. C
    Kidney
  4. D
    Gonads
Question 45Single Answer
The caudal fin primarily helps in:
  1. A
    Propulsion
  2. B
    Digestion
  3. C
    Excretion
  4. D
    Blood formation
Question 46Single Answer
Dorsal fins primarily contribute to:
  1. A
    Reproduction only
  2. B
    Digestion
  3. C
    Osmoregulation
  4. D
    Stability
Question 47Single Answer
Pectoral fins are paired fins located near the:
  1. A
    Head region
  2. B
    Tail tip only
  3. C
    Intestine
  4. D
    Gonad
Question 48Single Answer
Pelvic fins are:
  1. A
    Paired fins
  2. B
    Always unpaired fins
  3. C
    Respiratory organs
  4. D
    Digestive organs
Question 49Single Answer
The anal fin is usually:
  1. A
    Paired
  2. B
    Unpaired
  3. C
    A respiratory organ
  4. D
    A sensory barbel
Question 50Single Answer
A fusiform body shape is advantageous for:
  1. A
    Burrowing only
  2. B
    Efficient swimming
  3. C
    Walking on land
  4. D
    Shell secretion
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