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This set of Dock and Harbour Engineering Multiple Choice Questions & Answers (MCQs) focuses on Dock And Harbour Engineering Set 1
Q1 | Which of the following conditions of loading imposes the greatest load on the foundation incase of dry docks?
- When the dock is empty
- When the dock is empty with the ship of maximum tonnage
- When the dock is full of water
- When the dock is dry and is under construction
Q2 | Which of the following structures are constructed parallel to shore line to develop ademarcating line between land area and water area?
- Sea walls, bulk heads and groynes
- Sea walls, bulk heads and revetments
- Sea walls, revetments and groynes
- Bulk heads, revetments and groynes
Q3 | In multiple point mooring system, vessel is secured to minimum of
- Two points
- Four points
- Six points
- Eight points
Q4 | As compared to wall type breakwater, mound type breakwater
- Requires skilled labour
- Requires low maintenance cost
- Requires less material
- Results in less damage due to gradual failure
Q5 | In a two lane channel, bottom width of channel is given by
- Manoeuvring lane + (2 × Bank clearance lane)
- (2 × Manoeuvring lane) + (2 × Bank clearance lane)
- (2 × Manoeuvring lane) + (2 × Bank clearance lane + ship clearance lane)
- Manoeuvring lane + (2 × Bank clearance lane) + ship clearance lane
Q6 | In basins subjected to strong winds and tide, the length of the berthing area should not beless than
- The length of design vessel
- The length of design vessel + 10% clearance between adjacent vessels
- The length of design vessel + 20% clearance between adjacent vessels
- Twice the length of design vessel
Q7 | A ship strikes the berth generally at an angle
- 90° with the face of the dock
- 45° with the face of the dock
- 30° with the face of the dock
- 10° with the face of the dock
Q8 | The difference in height between highest high water and lowest low water is called
- Mean range
- Maximum range
- Maximum rise
- Mean rise
Q9 | When a ship floats at its designed water line, the vertical distance from water line to thebottom of the ship is known as
- Beam
- Depth
- Freeboard
- Draft
Q10 | 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
- (i) and (ii) are correct
- (i) and (iii) are correct
- Only (ii) is correct
- Only (iii) is correct
Q11 | For designing the dock, the proportion of ship load assumed to be borne by keel blocks is
- 08-May
- 08-Mar
- 16-Mar
- 16-May
Q12 | 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
- Surf
- Clapotis
- Fetch
- Swell
Q13 | Select the incorrect statement.
- The progress of work in low level method of mound construction is very slow
- Barge method of mound construction is economical
- In low level method of mound construction, the area of working is limited
- In staging method of mound construction, the work is not interrupted even during stormy weather
Q14 | Pick up the correct statement from the following:
- The regular periodic rise and fall of the surface of the sea, is called tide
- The average difference in water level between high tide and low tide at a place, is called tidal range
- The movement of water caused by the action of tide, is called a tidal current
- all of the above
Q15 | The significant wave height is defined is the average height of the
- One-third highest waves
- One-fourth highest waves
- One-fifth highest waves
- One-tenth highest waves
Q16 | The fixed mooring does not require
- Mooring post
- Bollard
- Anchors
- Capstan
Q17 | A ship is berthed in a chamber and lifted by principles of buoyancy, such a chamber is called.
- Dry dock
- Wet dock
- Floating dock
- Refuge dock
Q18 | Due to the impact of water wave on a sea shore structure
- Hydrostatic pressure coupled with a strong momentary impact is caused
- Vibrations are subjected
- Internal pressure is developed
- All of the above
Q19 | 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 passesSelect your answer based on the coding system given below:
- Both A and R is true and R is correct explanation of A
- Both A and R is true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
Q20 | Surf zone is:
- The fathom line of 10 m depth
- The fathom line of 5 m depth
- The swell of the sea breaking on the shore or reefs
- The coast line attacked by the waves
Q21 | 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 variationsSelect your answer based on the coding system given below:
- Both A and R is true and R is the correct explanation of A
- Both A and R is true but R is not correct explanation of A
- A is true but R is false
- A is false but R is true
Q22 | Pick up the correct statement from the following:
- A harbour without any port complex, is called a refuge harbour
- A harbour used for fishery, is called fishery harbour
- The terminal building of a commercial harbour consists of an administrative block, customs clearance and ware-houses
- All the above
Q23 | Which of the following structures protects the shore by trapping of littoral drift?
- Groynes
- Sea walls
- Revetments
- Moles
Q24 | 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)
- L
- 1.5 L
- 2.0 L
- 4.0 L
Q25 | Pick up the correct statement from the following:
- The maritime structures should be designed to withstand wave motion of air
- The wind vortex results in conical depression in the air surface
- A tube of air rotating at hundreds of kilometres per hour forms a tornado
- all of the above