D:-None of these

Correct Answer:- Option-B
Question29:-An example of marine borer

A:-Rotifer

B:-Bamacles

C:-Diatoms

D:-Martesia

Correct Answer:- Option-D
Question30:-Gradual distintegration of metal due to chemical or electrochemical attack by various agents is termed as

A:-Disintegration

B:-Rotting

C:-Corrossion

D:-None of these

Correct Answer:- Option-C

Question31:-The accumulation of animal and plant life on submerged structures in marine environment causing economic
loss is termed as

A:-Biofouling
B:-Distintegration
C:-Deposition
D:-None of these
Correct Answer:- Option-A
Question32:-An example of passive fishing gear
A:-Trawl net
B:-Purse seine
C:-Gill net
D:-Beach seine
Correct Answer:- Option-C
Question33:-A method of fishing in which several lines with special lures are towed from a boat
A:-Long lining
B:-Entangling
C:-Trawling
D:-Trolling
Correct Answer:- Option-D

Question34:-The triangular piece of webbing attached on either side of the upper and lower bellies at the junction with the
wings in four seam trawl

B:-Flapper
C:-False belly
D:-Square
Correct Answer:- Option-A
Question35:-Trawl net is kept opened horizontally during towing by
A:-Wire ropes
B:-Otter boards
C:Kelley's eye
D:-Head rope
Correct Answer:- Option-B
Question36:-The ropes or cables that connect the wing to the otter boards are called
A:-Sweep lines
B:-Pork line
C:-Belly line
D:-Lazy line
Correct Answer:- Option-A
Question37:-Jig lines are used for capturing
A:-Predatory fishes
B:-Squids
C:-Lobsters
D:-None of these
Correct Answer:- Option-B
Question38:-A few rows of meshes made of thicker twine provided on the upper and lower sides of webbing in a puse seine
is termed as