Question 1

Select the incorrect statement.

Accepted Answer

A)  The progress of work in low level method of mound construction is very slow
B)  Barge method of mound construction is economical
C)  In low level method of mound construction, the area of working is limited
D)  In staging method of mound construction, the work is not interrupted even during stormy weather B

Question 2

Surf zone is:

Accepted Answer

A)  The fathom line of 10 m depth
B)  The fathom line of 5 m depth
C)  The swell of the sea breaking on the shore or reefs
D)  The coast line attacked by the waves C

Question 3

For designing the dock, the proportion of ship load assumed to be borne by keel blocks is

Accepted Answer

A)  5/8
B)  3/8
C)  3/16
D)  5/16 A

Question 4

Pick up the correct statement from the following:

Accepted Answer

A)  The maritime structures should be designed to withstand wave motion of air
B)  The wind vortex results in conical depression in the air surface
C)  A tube of air rotating at hundreds of kilometres per hour forms a tornado
D)  all of the above

Question 5

Due to the impact of water wave on a sea shore structure

Accepted Answer

A)  Hydrostatic pressure coupled with a strong momentary impact is caused
B)  Vibrations are subjected
C)  Internal pressure is developed
D)  All of the above

Question 6

In a two lane channel, bottom width of channel is given by

Accepted Answer

A)  Manoeuvring lane + (2 × Bank clearance lane) 
B)  (2 × Manoeuvring lane)  + (2 × Bank clearance lane) 
C)  (2 × Manoeuvring lane)  + (2 × Bank clearance lane + ship clearance lane) 
D)  Manoeuvring lane + (2 × Bank clearance lane)  + ship clearance lane

Question 7

As compared to wall type breakwater, mound type breakwater

Accepted Answer

A)  Requires skilled labour
B)  Requires low maintenance cost
C)  Requires less material
D)  Results in less damage due to gradual failure

Question 8

Assertion A: Basin walls have to be of much greater height than dock walls. Reason R: Tidal basins are subject to fluctuations of levels due to tidal variations Select your answer based on the coding system given below:

Accepted Answer

A)  Both A and R is true and R is the correct explanation of A
B)  Both A and R is true but R is not correct explanation of A
C)  A is true but R is false
D)  A is false but R is true

Question 9

By increasing the rise of lock-gates,
(i) The length of the lock gate will increase
(ii) Transverse stress due to water pressure on the gate will increase
(iii) Compressive force on the gate will increase Of these statements

Accepted Answer

A)  (i)  and (ii)  are correct
B)  (i)  and (iii)  are correct
C)  Only (ii)  is correct
D)  Only (iii)  is correct

Question 10

A ship strikes the berth generally at an angle

Accepted Answer

A)  90° with the face of the dock
B)  45° with the face of the dock
C)  30° with the face of the dock
D)  10° with the face of the dock

Question 11

In multiple point mooring system, vessel is secured to minimum of

Accepted Answer

A)  Two points
B)  Four points
C)  Six points
D)  Eight points

Question 12

The significant wave height is defined is the average height of the

Accepted Answer

A)  One-third highest waves
B)  One-fourth highest waves
C)  One-fifth highest waves
D)  One-tenth highest waves

Question 13

The fixed mooring does not require

Accepted Answer

A)  Mooring post
B)  Bollard
C)  Anchors
D)  Capstan

Question 14

The difference in height between highest high water and lowest low water is called

Accepted Answer

A)  Mean range
B)  Maximum range
C)  Maximum rise
D)  Mean rise

Question 15

Assertion A: Intervention of undulations in the sea bed reduces the depth of wave at the section. Reason R: No wave can have a height greater than the depth of water through which it passes Select your answer based on the coding system given below:

Accepted Answer

A)  Both A and R is true and R is correct explanation of A
B)  Both A and R is true but R is not the correct explanation of A
C)  A is true but R is false
D)  A is false but R is true

Question 16

Which of the following structures protects the shore by trapping of littoral drift?

Accepted Answer

A)  Groynes
B)  Sea walls
C)  Revetments
D)  Moles

Question 17

Pick up the correct statement from the following:

Accepted Answer

A)  The regular periodic rise and fall of the surface of the sea, is called tide
B)  The average difference in water level between high tide and low tide at a place, is called tidal range
C)  The movement of water caused by the action of tide, is called a tidal current
D)  all of the above

Question 18

When a wave strikes a vertical breakwater in deep water, it is reflected back and on meeting another advancing wave of similar amplitude merges and rises vertically in a wall of water. This phenomenon is called

Accepted Answer

A)  Surf
B)  Clapotis
C)  Fetch
D)  Swell

Question 19

When a ship floats at its designed water line, the vertical distance from water line to the bottom of the ship is known as

Accepted Answer

A)  Beam
B)  Depth
C)  Freeboard
D)  Draft

Question 20

The minimum diameter of turning besin, where ships turn by going ahead and without tug assistance should be (L is the length of the ship)

Accepted Answer

A)  L
B)  1.5 L
C)  2.0 L
D)  4.0 L

Exam 1: Marine Structures and Design

Select the incorrect statement.

Surf zone is:

For designing the dock, the proportion of ship load assumed to be borne by keel blocks is

Pick up the correct statement from the following:

Due to the impact of water wave on a sea shore structure

In a two lane channel, bottom width of channel is given by

As compared to wall type breakwater, mound type breakwater

Assertion A: Basin walls have to be of much greater height than dock walls. Reason R: Tidal basins are subject to fluctuations of levels due to tidal variations Select your answer based on the coding system given below:

By increasing the rise of lock-gates, (i) The length of the lock gate will increase (ii) Transverse stress due to water pressure on the gate will increase (iii) Compressive force on the gate will increase Of these statements

A ship strikes the berth generally at an angle

In multiple point mooring system, vessel is secured to minimum of

The significant wave height is defined is the average height of the

The fixed mooring does not require

The difference in height between highest high water and lowest low water is called

Assertion A: Intervention of undulations in the sea bed reduces the depth of wave at the section. Reason R: No wave can have a height greater than the depth of water through which it passes Select your answer based on the coding system given below:

Which of the following structures protects the shore by trapping of littoral drift?

Pick up the correct statement from the following:

When a wave strikes a vertical breakwater in deep water, it is reflected back and on meeting another advancing wave of similar amplitude merges and rises vertically in a wall of water. This phenomenon is called

When a ship floats at its designed water line, the vertical distance from water line to the bottom of the ship is known as

The minimum diameter of turning besin, where ships turn by going ahead and without tug assistance should be (L is the length of the ship)