Docks and Harbor Engineering Quiz Set-1 [2025]

Which of the following are repair docks?

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

Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?

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

A ship strikes the berth generally at an angle

Consider the following statements.
(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,
(ii) Slip is the space of water area between two adjacent piers where ships are berthed,
(iii) Pier head is a structure constructed near the tip of break water near the harbor entrance. Of the statements

A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.

Assertion A: Depth and width required at the entrance to a harbour are more than those required in the channel.
Reason R: The entrance to a harbour is usually more exposed to waves as compared to the harbour itself.
Select your answer based on the coding system given below:

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 maximum harbour depth below lowest low water is generally equal to
(i) loaded draft + 1.2 m when bottom is rock
(ii) loaded draft + 1.8 m when bottom is soft
(iii) loaded draft + 1.2 m when bottom is soft
(iv) loaded draft + 1.8 m when bottom is rock
Of these statements

The minimum diameter of turning besin, where ships turn by going ahead and without tug assistance should be....

(where L is the length of the largest ship to use the port)

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 displacement light Of these statements

In basins subjected to strong winds and tide, the length of the berthing area should not be less than

As per Stevenson's empirical formula, the approximate value of the height of the wave in metres is given by ..

(where F is the fetch in km)

As per Berlin's formula, the length of wave in metres is given by ...

(where’t’ is the period in seconds for two successive waves to pass the same section.)

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:

Consider the following statements in regard to Beaufort scale for wind speeds,
(i) The Beaufort number ranges from 1 to 12.

(ii) Higher Beaufort number indicates higher speed of wind,
(iii) Beaufort number for calm is smallest and for hurricane is highest Of these statements

At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be

Minimum width of ship clearance shall be ....

(where "B" is beam of the design vessel)

Select the incorrect statement.

Assertion A: Marine structures are made specially bulky and strong.
Reason R: Sea insects result in undermining of the hardest and the soundest building material. Select your answer based on the coding system given below:

As compared to wall type breakwater, mound type breakwater

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

If the maximum spring rise is 2 m and height of the waves expected is 4 m , then the breakwater height above the datum will be

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

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:

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

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

Which of the following is a fixed type mooring accessory?

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

If Hs is the significant wave height, then the average wave height and highest wave height respectively are given by

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

Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area?

Which of the following type of sea walls results in greatest protection of shore structures?

Assertion A : Large size stones are required in stone revetment in shore
protection.
Reason R: Resistance of stone to wave force is proportional to its volume and wave force is proportional to the exposed area of the stone.
Select your answer based on the coding system given below.

The threshold markings are

An airport has 4 gates. If the weighted average gate occupancy time is 30 minutes and gate utilisation factor is 0.5, then the capacity of the gate will be

The capacity of parallel runway pattern depends upon

The engine failure case for determining the basic runway length may require

The minimum width of clearway is

If the monthly mean of average daily temperature for the hottest month of the year is 25° C and the monthly mean of the maximum daily temperature of the same month of the year is 46° C, the airport reference temperature is

Consider the following statements regarding ICAO recommendation for correction to basic runway length
1. The basic runway length should be increased at the rate of 7 percent per 300 m rise in elevation above the mean sea level.
2. The basic runway length after having been corrected for elevation should be further increased at the rate of 1 percent for every 1°C rise in airport reference temperature above the standard atmospheric temperature at that elevation.
3. The runway length after having been corrected for elevation and temperature should be further increased at the rate of 20% for every 1 percent of effective gradient.
Of these statements

The total length of a runway is 1000 m. The elevation at distance 0,200 m, 400m, 600 m, 800 m and 1000 m are 100.0 m, 99.2 m, 101.0 m, 101.8 m, 101.4 m and 101.0 m respectively. The effective gradient of runway will be.

As per ICAO, the minimum basic runway length for A and E type of airport will be

Zero fuel weight of an aircraft is

The cruising speed of the aircraft is 500 kmph. If there is a head wind of 50 kmph, then the air speed and ground speed of the aircraft respectively will be

As per ICAO, for airports serving big aircrafts, the crosswind component should not exceed

As per ICAO recommendation, minimum width of safety area for instrumental runway should be

As per ICAO, for A, B, and C type of airports, maximum effective, transverse and longitudinal grades in percentage respectively are

As per ICAO recommendation, the rate of change of longitudinal gradient per 30 m length of vertical curve for A and B type of airports is limited to a maximum of

Calm period is the percentage of time during which wind intensity is less than

For determining the basic runway. length, the landing case requires that aircraft should come to a stop within p % of the landing distance. The value of p is

According to ICAO, all markings on the runways are

Runway threshold is indicated by a series of parallel lines starting from a distance of

The width and interval of transverse centre line bars along the extended centre line of runway, in approach lighting system are

In Instrumental landing system, the middle markers are located

The size of landing area for multiengined helicopters operating under 1FR conditions is

The centre to centre spacing of heliport lighting along the periphery of landing and take off area should be

The slope of the obstruction clearance line from the boundary of the heliport should be

Assertion A : Airport capacity during IFR conditions is usually less than that during VFR conditions.
Reason R: During clear weather condition (VFR), the aircrafts on final approach to runway can be spaced closer during poor visibility conditions.
Select your answer based on the coding system given below:

For supersonic transport aircraft, the minimum turning radius of taxiway is

As per UK design criteria, if LCN of aircraft is between 1.25 to 1.5 times the LCN of pavement, then the number of movements allowed are

Which of the following is an example of failure in flexible pavements ?

The main disadvantage of angle nose out parking configuration of aircraft is that the

Which of the following is used for servicing and repairs of the aircraft ?

The slope of the transitional surface for A, B and C type of runway shall be

The length of clear zone for none instrument runway of a small aircraft is

In approach areas of runways equipped with instrumental landing facilities any object within 4.5 km distance from runway end shall be considered as an obstruction if its height is more than

Maximum gross take-off weight of an aircraft is

Consider the following statements: Wind rose diagram is used for the purposes of
1. runway orientation
2. estimating the runway capacity
3. geometric design of holding apron Of these statements

Which of the following factors are taken into account for estimating the runway length required for aircraft landing?
1. Normal maximum temperature
2. Airport elevation
3. Maximum landing weight
4. Effective runway gradient
Select the correct answer using the codes given below Codes

In an airport, if 4 gr oups of 5 gates each located well-separated are considered for traffic and the future to present traffic ratio is 3, then the total requirement of future gates will be

Castor angle is defined as the angle

The runway length after correcting for elevation and temperature is 2845 m. If the effective gradient on runway is 0.5 percent then the revised runway length will be