Dock And Harbour Engineering Set 3 MCQs

Q1 | In tropical regions,

The surface gets heated more effectively than the arctic areas

After heating, the air becomes lighter and is displaced by cool air from the polar regions

The rising tropical air flows towards the polar region in the upper strata

All of the above

Q2 | Buoys which support the cables to which vessels are attached are of

Cylindrical shape

Pear shaped

Spherical shape

All of these

Q3 | Dead weight tonnage of a ship(i) Varies with latitude and season(ii) Is more than displacement tonnage(iii) Is the difference between displacement load and displacementlight Of these statements

i) and ii) are correct

ii) and iii) are correct

i) and iii) are correct

Only iii) is correct

Q4 | The width of the entrances of the harbours is restricted to

100 m

125 m

150 m

180 m

Q5 | If H is the height of the wave expected, then the height of the breakwater is generally taken as

1.2 H to 1.25 H above the datum

1.2 H to 1.25 H above the low water level

1.2 H to 1.25 H above the high water level

1.2 H to 1.25 H above the mean sea level

Q6 | Littoral drift

Is the raised line of sand, parallel to the sea coast

Is the slow movement of surface water at sea caused by the wind

Is a current parallel to the shore, caused due to tangential component of the wind

Is a current perpendicular to the shore line caused due to wind

Q7 | Which one of the following statements is not relevant to hydrographic survey?

Establishment of a chain of bench marks near the shore line

Establishment of horizontal control points on the shore

Determination of the sea bed profile

None of these

Q8 | Pick up the correct statement from the following:

The breakwater which can be used as a platform for loading and unloading of cargo is called a mole

The brick masonry retaining wall which is used for loading and unloading of cargo is called quay wall

Three types of break waters are generally provided in harbours

All of the above

Q9 | Pick up the correct statement from the following:

The Mediterranean Sea is considered to be a huge harbour

The Caspian Sea is considered to be a big harbour

The Red sea is considered to be harbour

None of the above

Q10 | For large vessels, the buoys are strengthened by connecting it to a number of anchors having

One legged mooring

Two legged mooring

Three legged mooring

All the types as above

Q11 | Flow of air from one place to the other is caused due to

The sum of elevation

Pressure head

Velocity head

All of the above

Q12 | A lead line or sounding line

Is stretched thoroughly when wet before it is graduated

Should be soaked in water for about one hour prior to taking soundings

Is adjusted at regular interval

All the above