Docks and Harbours Online Test – Multiple Choice Questions and Answers 1. For large vessels, the buoys are strengthened by connecting it to a number of anchors having four legged mooring three legged mooring two legged mooring All the types as above 2. In a wet dock system, the cost of construction is quite heavy the locks of dock gate are operated by means of heavy bascule bridges and connected machinery entrance locks are provided with massive gates All the above 3. On the sea shore structures, the water wave impact causes suction force due to water returning after striking shear force due to deflected vertical force compressive force due to collapse of the wave All of the above 4. Location of soundings by range and one angle is done by the surveyor on the shore or on the boat on the boat on the shore none of the above 5. Pick up the correct statement from the following: Flood tides and Ebbstides are caused after 24 hours and 50 minutes corresponding to a lunar day Spring tides are roughly twice the height of neap tides Neap tides are caused when the moon is in her quarters All of the above 6. A roadstead : is the end of the road at the harbour is a protected area of water where boats can move safely may be protected by break water walls none of these 7. The width of the entrances of the harbours is restricted to 100m 120m 140m 180m 8. Pick up the correct statement from the following: The difference in time in solar hours and minutes from any lunar transit to the succeeding transit, is called high water level The spinning force is maximum at the equator and zero at the poles The influence of the earth’s gravity alone produces level-tidal less sea All of the above 9. The variation of atmospheric potential is caused due to : change in the density of air both difference in temperature over the surface of the earth and change in the density of air neither difference in temperature over the surface of the earth and change in the density of air difference in temperature over the surface of the earth 10. A dock: is provided with an arrangement to pump out water when required is an artificial basin for vessels where the variation of water in the shore does not affect the level of water is provided with a dock gate All the above Loading … Question 1 of 10
