The horizontal angles from the boat between A and B and B and C, the stations on the shore are respectively θ1 and θ2. The distances AB = L1 and BC = L2. For calculating the angle α2 at C between the boat and station B is obtained by using the following formula: where (β is horizontal angle between A and C at B).

αt tan α2 = 360° - (θ1 + θ2 + β) = φ

For location of soundings a range and one angle from the shore involves the following operations. Which one is correct ?

The first and the last soundings and every tenth soundings are fixed by angular observations

The intermediate soundings are fixed by the time intervals

The variation of atmospheric potential is caused due to :

difference in temperature over the surface of the earth

is a marine structure for berthing of vessels for loading and unloading cargo and passengers

is an artificial basin for vessels where the variation of water in the shore does not affect the level of water

is provided with an arrangement to pump out water when required

On the sea shore structures, the water wave impact causes

direct compressive force due to its horizontal component

shear force due to deflected vertical force

compressive force due to collapse of the wave

suction force due to water returning after striking

Soundings are required for

making nautical charts for navigation

ascertaining the areas subject to scour or silting

obtaining detailed information for construction

is a current perpendicular to the shore line caused due to wind.

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.

The shore line survey includes :

depicting the prominent details on shore line

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

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

hydrostatic pressure coupled with a strong momentary impact is caused

Location of soundings by two angles from the shore requires establishing

one range line parallel to shore

one range line perpendicular to shore

two range lines mutually perpendicular

is the end of the road at the harbour

is a protected area of water where boats can move safely

is the end of the road at the harbour

may be protected by break water walls

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

depicting the irregularities in the shore line, islands and projecting rocks

the coast line attacked by the waves.

the swell of the sea breaking on the shore or reefs

the coast line attacked by the waves.

In a wet dock system,

minimum required depth of water for the vessels is maintained

entrance locks are provided with massive gates

the locks of dock gate are operated by means of heavy bascule bridges and connected machinery

the cost of construction is quite heavy

with large material locally available to the waves

with largest material locally available to the waves

with large material locally available to the waves

with fine material locally available to the waves

with finest material locally available to the waves.

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

is generally used for depths exceeding 6 m

The dock wall is designed as a gravity retaining wall and is tested for

back fill pressure when the dock is empty

maximum water pressure from the dock without any back fill

the load charge transmitted to the dock by the movement of loaded vehicles or trains on the way

Pick up the incorrect statement from the following: In a dry dock block made of hard wood,

spacing of the blocks is 1.35 m

the lowest block is 1.8 m long 40 cm x 40 cm in cross-section

the middle block is 1.6 m long 40 cm x 40 cm in crosss-section

the top block is 1.2 m long 40 cm x 40 cm in cross-section

are the plants, grown in the neighbourhood of harbours

are the harbours established on the island south east of Greek mainland

are the natives of crete, an island south of Greek mainland

are the plants, grown in the neighbourhood of harbours

46 + Mcqs in Docks And Harbours in Civil Engineering Page 1 McqOptions

1.	If is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is
A.	0.15
B.	0.20
C.	0.28
D.	0.34
Answer» E.

Discussion

2.	The operation of removing material from the sea or river bed is known as
A.	Mining
B.	Dredging
C.	Digging
D.	None of these.
Answer» C. Digging

Discussion

3.	and are two stations on the shore line at distance . If the angle between and the boat and is a and the angle between and at boat is β, the and . Coordinate along and perpendicular to from are :
A.	none of the above.
Answer» B.

Discussion

4.	The horizontal angles from the boat between A and B and B and C, the stations on the shore are respectively θ1 and θ2. The distances AB = L1 and BC = L2. For calculating the angle α2 at C between the boat and station B is obtained by using the following formula: where (β is horizontal angle between A and C at B).
A.	[A].
B.	αt tan α2 = 360° - (θ1 + θ2 + β) = φ
C.	[C].
D.	all the above.
Answer» E.

Discussion

5.	P and Q are two stations on the shore line at distance d. If the angle between Q and the boat O and P is a and the angle between P and Q at boat O is β, the x and y. Coordinate along PQ and perpendicular to PQ from O are :
A.	[A].
B.	[B].
C.	[C].
D.	none of the above.
Answer» B. [B].

Discussion

6.	The wavelength is computed by Bertin's formula (where T is the period in seconds).
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

7.	Which one of the following lines is used for tying a ship with a dock
A.	bow line
B.	stern line
C.	spring line
D.	break line
Answer» E.

Discussion

8.	At a place the shore line is along North West-South East. The wind is blowing from the north. The littoral drift will be along
A.	south east
B.	south
C.	south west
D.	west
Answer» B. south

Discussion

9.	For location of soundings a range and one angle from the shore involves the following operations. Which one is correct ?
A.	A range line is established
B.	The first and the last soundings and every tenth soundings are fixed by angular observations
C.	The intermediate soundings are fixed by the time intervals
D.	All the above.
Answer» E.

Discussion

10.	The variation of atmospheric potential is caused due to :
A.	difference in temperature over the surface of the earth
B.	change in the density of air
C.	both (a) and (b)
D.	neither (a) nor (b).
Answer» D. neither (a) nor (b).

Discussion

11.	A dock:
A.	is a marine structure for berthing of vessels for loading and unloading cargo and passengers
B.	is an artificial basin for vessels where the variation of water in the shore does not affect the level of water
C.	is provided with a dock gate
D.	is provided with an arrangement to pump out water when required
Answer» E.

Discussion

12.	For large vessels, the buoys are strengthened by connecting it to a number of anchors having
A.	one legged mooring
B.	two legged mooring
C.	three legged mooring
D.	four legged mooring
Answer» E.

Discussion

13.	On the sea shore structures, the water wave impact causes
A.	direct compressive force due to its horizontal component
B.	shear force due to deflected vertical force
C.	compressive force due to collapse of the wave
D.	suction force due to water returning after striking
Answer» E.

Discussion

14.	Depth of borings for soil investigation, is generally kept below low water level
A.	30 m
B.	35 m
C.	45 m
D.	40 m
Answer» D. 40 m

Discussion

15.	Soundings are required for
A.	making nautical charts for navigation
B.	ascertaining the areas subject to scour or silting
C.	obtaining detailed information for construction
D.	all the above.
Answer» E.

Discussion

16.	The smoothened surface of the front face of the guay walls, is known as fending which is made of
A.	granite stone
B.	timber
C.	steel
D.	all the above.
Answer» E.

Discussion

17.	If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is
A.	0.15 F
B.	0.20 F
C.	0.28 F
D.	0.34 F
Answer» E.

Discussion

18.	Littoral drift
A.	is the raised line of sand, parallel to the sea coast
B.	is the slow movement of surface water at sea caused by the wind
C.	is a current parallel to the shore, caused due to tangential component of the wind
D.	is a current perpendicular to the shore line caused due to wind.
Answer» D. is a current perpendicular to the shore line caused due to wind.

Discussion

19.	The low water datum for a lake is defined as the surface of the lake when it is at elevation
A.	180.5 m above M.S.L.
B.	190.5 m above M.S.L.
C.	170.5 m above M.S.L.
D.	200.0 m above M.S.L.
Answer» B. 190.5 m above M.S.L.

Discussion

20.	Which one of the following land marks on the coast line must be depicted on hydrographic maps ?
A.	shore line
B.	light houses
C.	church spires
D.	all the above.
Answer» E.

Discussion

21.	On a hydrographic map, the following feature is shown :
A.	datum
B.	high and low water lines
C.	depth contours
D.	land and water areas
Answer» E.

Discussion

22.	The width of the entrances of the harbours is restricted to
A.	100 m
B.	125 m
C.	150 m
D.	180 m
Answer» E.

Discussion

23.	The shore line survey includes :
A.	depicting the shore line
B.	depicting the prominent details on shore line
C.	depicting the high water line
D.	depicting the low water line
Answer» E.

Discussion

24.	In tropical regions,
A.	the surface gets heated more effectively than the arctic areas
B.	after heating, the air becomes lighter and is displaced by cool air from the polar regions
C.	the rising tropical air flows towards the polar region in the upper strata
D.	all of the above.
Answer» E.

Discussion

25.	Due to the impact of water wave on a sea shore structure
A.	hydrostatic pressure coupled with a strong momentary impact is caused
B.	vibrations are subjected
C.	internal pressure is developed
D.	weakens the foundation
Answer» E.

Discussion

26.	A low wall built out into the sea more or less perpendicular to the coast line, to resist the travel of sand and shingle along a beach, is called
A.	break water
B.	break wall
C.	groins
D.	shore wall.
Answer» D. shore wall.

Discussion

27.	The important component of a sea port is
A.	terminal buildings
B.	the docks
C.	the harbour
D.	all of these.
Answer» E.

Discussion

28.	Location of soundings by two angles from the shore requires establishing
A.	one range line parallel to shore
B.	one range line perpendicular to shore
C.	two range lines mutually perpendicular
D.	no range line.
Answer» E.

Discussion

29.	A roadstead :
A.	is a protected area of water where boats can move safely
B.	is the end of the road at the harbour
C.	may be protected by break water walls
D.	none of these.
Answer» B. is the end of the road at the harbour

Discussion

30.	Which one of the following statements is not relevant to hydrographic survey :
A.	establishment of a chain of bench marks near the shore line
B.	establishment of horizontal control points on the shore
C.	determination of the sea bed profile
D.	depicting the irregularities in the shore line, islands and projecting rocks
Answer» E.

Discussion

31.	The shape of docks and basins is generally kept
A.	rectangular ways
B.	diamond shape guays
C.	inclined gauys
D.	all of these.
Answer» E.

Discussion

32.	Surf zone is :
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.
Answer» D. the coast line attacked by the waves.

Discussion

33.	The heaviest line is used to democrate
A.	the low water line
B.	the high water line
C.	the limit of swamps
D.	the direction of current.
Answer» C. the limit of swamps

Discussion

34.	The floating mooring does not require
A.	cables
B.	anchors
C.	bollard
D.	buoy.
Answer» D. buoy.

Discussion

35.	In a wet dock system,
A.	minimum required depth of water for the vessels is maintained
B.	entrance locks are provided with massive gates
C.	the locks of dock gate are operated by means of heavy bascule bridges and connected machinery
D.	the cost of construction is quite heavy
Answer» E.

Discussion

36.	The beach is built:
A.	with largest material locally available to the waves
B.	with large material locally available to the waves
C.	with fine material locally available to the waves
D.	with finest material locally available to the waves.
Answer» B. with large material locally available to the waves

Discussion

37.	A lead line or sounding line
A.	is stretched thoroughly when wet before it is graduated
B.	should be soaked in water for about one hour prior to taking soundings
C.	is adjusted at regular interval
D.	is generally used for depths exceeding 6 m
Answer» E.

Discussion

38.	Flow of air from one place to the other is caused due to
A.	the sum of elevation
B.	pressure head
C.	velocity head
D.	all of the above.
Answer» E.

Discussion

39.	If h and h1 are the heights of a light house and the observer in a ship in metres above M S L then the horizontal distance from the ship to the light house in kilometres is
A.	3.86 (h + h1)
B.	3.86 (h - h1)
C.	3.86 (h x h1)
D.	3.86 œÄ (h + h1)
Answer» B. 3.86 (h - h1)

Discussion

40.	The dock wall is designed as a gravity retaining wall and is tested for
A.	back fill pressure when the dock is empty
B.	maximum water pressure from the dock without any back fill
C.	the load charge transmitted to the dock by the movement of loaded vehicles or trains on the way
D.	all of the above.
Answer» E.

Discussion

41.	Buoys which support the cables to which vessels are attached are of
A.	cylindrical shape
B.	drum
C.	pear shaped
D.	spherical shape
Answer» E.

Discussion

42.	According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for passenger vessels is :
A.	7.25 to 1
B.	7.80 to 1
C.	8.11 to 1
D.	8.44 to 1
Answer» E.

Discussion

43.	Location of soundings by range and one angle is done by the surveyor
A.	on the shore
B.	on the boat
C.	on the shore or on the boat
D.	none of the above.
Answer» D. none of the above.

Discussion

44.	Pick up the incorrect statement from the following: In a dry dock block made of hard wood,
A.	spacing of the blocks is 1.35 m
B.	the lowest block is 1.8 m long 40 cm x 40 cm in cross-section
C.	the middle block is 1.6 m long 40 cm x 40 cm in crosss-section
D.	the top block is 1.2 m long 40 cm x 40 cm in cross-section
Answer» E.

Discussion

45.	Cretans :
A.	are the harbours established on the island south east of Greek mainland
B.	are the natives of crete, an island south of Greek mainland
C.	are the plants, grown in the neighbourhood of harbours
D.	none of the above.
Answer» C. are the plants, grown in the neighbourhood of harbours

Discussion

46.	According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is
A.	5.5 and 6.0 to 1
B.	6.2 and 6.8 to 1
C.	7.4 and 7.8 to 1
D.	8.2 and 8.5 to 1
Answer» D. 8.2 and 8.5 to 1

Discussion

Explore topic-wise MCQs in Civil Engineering.

If is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is

The operation of removing material from the sea or river bed is known as

and are two stations on the shore line at distance . If the angle between and the boat and is a and the angle between and at boat is β, the and . Coordinate along and perpendicular to from are :

P and Q are two stations on the shore line at distance d. If the angle between Q and the boat O and P is a and the angle between P and Q at boat O is β, the x and y. Coordinate along PQ and perpendicular to PQ from O are :

The wavelength is computed by Bertin's formula (where T is the period in seconds).

Which one of the following lines is used for tying a ship with a dock

At a place the shore line is along North West-South East. The wind is blowing from the north. The littoral drift will be along

For location of soundings a range and one angle from the shore involves the following operations. Which one is correct ?

The variation of atmospheric potential is caused due to :

A dock:

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

On the sea shore structures, the water wave impact causes

Depth of borings for soil investigation, is generally kept below low water level

Soundings are required for

The smoothened surface of the front face of the guay walls, is known as fending which is made of

If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is

Littoral drift

The low water datum for a lake is defined as the surface of the lake when it is at elevation

Which one of the following land marks on the coast line must be depicted on hydrographic maps ?

On a hydrographic map, the following feature is shown :

The width of the entrances of the harbours is restricted to

The shore line survey includes :

In tropical regions,

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

A low wall built out into the sea more or less perpendicular to the coast line, to resist the travel of sand and shingle along a beach, is called

The important component of a sea port is

Location of soundings by two angles from the shore requires establishing

A roadstead :

Which one of the following statements is not relevant to hydrographic survey :

The shape of docks and basins is generally kept

Surf zone is :

The heaviest line is used to democrate

The floating mooring does not require

In a wet dock system,

The beach is built:

A lead line or sounding line

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

If h and h1 are the heights of a light house and the observer in a ship in metres above M S L then the horizontal distance from the ship to the light house in kilometres is

The dock wall is designed as a gravity retaining wall and is tested for

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

According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for passenger vessels is :

Location of soundings by range and one angle is done by the surveyor

Pick up the incorrect statement from the following: In a dry dock block made of hard wood,

Cretans :

According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is