RBS MCSI EXAM

RBS MCSI EXAM A beach that consists of gravel indicates conditions of: - CORRECT ANSWER-high wave energy Waves brake in the nearshore zone when - CORRECT ANSWER-either wave becomes too steep, water becomes too shallow In the North Atlantic, the tidal wave turns around the amphidromic point in - CORRECT ANSWER-a counterclockwise direction Rip currents are: - CORRECT ANSWER-wave-induced currents the line of demarcation between the water and the exposed beach (i.e. land-water interface) is called: - CORRECT ANSWER-shoreline The tidal range in the Bay of Fundy is record-high because - CORRECT ANSWERperiod of seiches in the bay is the same as the tidal period under ideal conditions and in most places on earth, the time between high tide and the next high tide is - CORRECT ANSWER-12 hrs 25mins the difference between the sea water level at low tide and high tide is called: - CORRECT ANSWER-tidal range water flowing out of a bay due to a change in the tides is called: - CORRECT ANSWERebb current or tide the time between two successive spring tides is: - CORRECT ANSWER-two weeks ---refers to the movement of sand grains along the beach - CORRECT ANSWERlongshore drift what are the tides in the southeastern US? - CORRECT ANSWER-semidiurnal tides what is the equation relating wave frequency (f) with wave speed (c) and wave length (L)? - CORRECT ANSWER-C=L*f wave length is the horizontal distance between - CORRECT ANSWER-two adjacent crests the distance between a crest and the adjacent through of a wave is 15m. What is the wavelength of this wave? - CORRECT ANSWER-30m Waves are generated when the wind blows over a body of water. The wave height depends on: - CORRECT ANSWER-Wind, speed, fetch and length of time that the wind blows A tsunami is - CORRECT ANSWER-a large wave caused by an undersea event an earthquake which causes a large wave the distance between two wave crests is called the - CORRECT ANSWER-wavelength the height of an ocean wave increases as - CORRECT ANSWER-The wind speed increases The wind blows for longer times The distance over which the wind flows over the water increases if you followed a single drop of water during a passing wave, in which motion would it move? - CORRECT ANSWER-vertical circle the trough is the lowest point between two waves - CORRECT ANSWER-true what causes the tides? - CORRECT ANSWER-gravity what is a hurricane? - CORRECT ANSWER-storm with winds of 75 mph or more when is the main hurricane season in the North Atlantic? - CORRECT ANSWER-june to november what is the name of the scale used to rank hurricanes and measure their damage potential? - CORRECT ANSWER-Saffri-Simpson what causes the most deaths from a hurricane? - CORRECT ANSWER-storm surge what is a major cause if hurricane formation? - CORRECT ANSWER-warm ocean water what is a storm surge? - CORRECT ANSWER-severe flooding caused by higher than normal tides where are the worst winds in a hurricane found? - CORRECT ANSWER-the eyewall around the eye of the hurricane In the Northern Hemisphere, which direction do a hurricane's winds rotate? - CORRECT ANSWER-counter-clockwise Who chooses the names for tropical storms and hurricanes in the Atlantic? - CORRECT ANSWER-The World Meteorological Organization Is gravity necessary for the existence of the sea waves we see near the coastline (away from the wave generation area)? - CORRECT ANSWER-Yes The tides in figure 1 at location A are : - CORRECT ANSWER-semi-diurnal The tides in figure 1 at location B are: diurnal - CORRECT ANSWERWhich tidal variation produces higher tides? - CORRECT ANSWER-spring During storm periods high-energy waves strike the beach. This is when... - CORRECT ANSWER-the berm shrinks and the longshore bar grows Waves brake in the nearshore zone when - CORRECT ANSWER-either the wave becomes too steep or the water becomes too shallow what is the effect of infiltration in swash zone sediment transport? - CORRECT ANSWER-it promotes onshore sediment accumulation and beach build up. Assume a beach that is laterally confined by two headlands that do not permit any sediment transport in the alongshore. The beach is backed by eroding cliffs and has a river that discharges some 20,000m3 of sediment in one year. Cliff erosion produces some 50,000m3 of sediment per year. No significant offshore canyons exist in the area. Which scenario is more likely to be true? - CORRECT ANSWER-The beach is accreting Normally beaches will have the greatest amount of sand on the berm near the end of which period? - CORRECT ANSWER-summer What is the main agent/ mechanism for the creation of a dune? - CORRECT ANSWERWinds the portion if the nearshore in which bore-like waves occur after they brake is called: - CORRECT ANSWER-surf zone Period change in sea level relative to land along a coast known as - CORRECT ANSWER-tide spring tides occur, approximately - CORRECT ANSWER-twice a month Neap tides occur when - CORRECT ANSWER-the sun moon and earth are at right angles, occur every first and third quarter moon, and have lower tidal range than spring tides type of tide experienced in Miami - CORRECT ANSWER-semidiurnal the point around which tidal crests and troughs rotate is known as - COR