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TRANSPORTATION ENGINEERING > Ports and Harbors > Flashcards

Ports and Harbors Flashcards

1
Q

The maximum current velocity through the harbor entrance should not exceed ___.

A

1.5 m/s or 3 knots

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2
Q

The stopping distance of a loaded ship is _____.

A

7 to 8 times the ship’s length

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3
Q

AN instrument used to measure the intensity of wind.

A

Beuforts Scale

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4
Q

The ratio of the wave length to its height for ocean waves is between

A

17 and 33

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5
Q

An open water of navigable depth is called __

A

Fairway

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6
Q

Waves generated by storms, which occurs outside area of observation.

A

Swells

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7
Q

Waves generated by wind that are acting on the sea surface bordering on the port site.

A

Wind wave

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8
Q

Waves in which the ratio of water depth to the wave length is greater than 0.5

A

Deep water waves

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9
Q

Waves in which the ratio of water depth to the wave length is less than 0.5 but greater than 0.4

A

Intermediate water waves

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10
Q

Waves in which the ratio of water depth to the wave length is less than or equal to 0.4

A

Shallow water wave

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11
Q

The arithmetical mean value of the highest, one third of the waves for a stated interval.

A

Significant wave height

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12
Q

An abnormal rise of the sea level that occurs when a typhoon passes by.

A

Storm surge

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13
Q

The distance that the wind blows over the sea in generating the waves is known as:

A

Fetch

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14
Q

The ratio of the wave height to its wave length is called:

A

steepness

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15
Q

The falling tide

A

Ebb Tide

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16
Q

Waves with an extremely long period that mainly occur when there is a sudden large scale se floor movements associated severe, shallow focus earthquake.

A

Tsunamis

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17
Q

The difference in height between the mean higher high water and mean lower low water.

A

Diurnal Range

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18
Q

The highest tides which occur at intervals of half a lunar month is called

A

Spring Tides

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19
Q

The difference in height between high water and low water at a tidal station is called ___.

A

Tidal Range

20
Q

Waves formed by moving ship or boats are called _____

A

Wakes

21
Q

Waves formed by earthquake disturbances.

A

Tsunamis

22
Q

Waves formed by gravitational attraction of the moon and sun

A

Tides

23
Q

The spread of energy along a wave crest is called ____

A

Diffraction

24
Q

The bending of waves as they slow down.

A

Refraction

25
Q

Waves under the influence of the winds that generated them are called ___

A

Sea

26
Q

The periodic rise and fall of the ocean waters produced by the attraction of the moon and sun

A

Tides

27
Q

The average of the high water over a 19 year period is known as ____

A

Mean High Water

28
Q

Tides which occurs only one high tide a day is called ____

A

Diurnal Tides

29
Q

If one of the two daily tide is incomplete, that is it does not reach the height of the previous tide, then the tides are referred to as ____

A

Mixed Diurnal Tides

30
Q

The average height of the higher high waters over a 19 year period

A

Mean higher high water

31
Q

The average of the low water over a 19 year period is known as ____

A

Mean low water

32
Q

The higher of the two high waters of any diurnal tide day

A

Higher High water.

33
Q

The lower of the two low waters of any diurnal tide day.

A

Lower low water

34
Q

The lowest height of water of spring tides.

A

Lowest low water

35
Q

The height of the mean high water above the mean low water

A

Mean Range

36
Q

The mean of the height of mean high water above the mean low water is referred to as:

A

Mean Sea Level

37
Q

A maximum wave height and wave period of the maximum wave height in wave train.

A

Highest Wave

38
Q

The height between the trough and the crest of a wave is called _____

A

Amplitude

39
Q

Highest point of the wave

A

Wave crest

40
Q

The lowest point of the wave

A

Wave trough

41
Q

The distance between the highest point and the lowest point of the wave.

A

Wave height

42
Q

The process of widening, enlarging, cleaning, or deepening of channels in harbors, rivers and canals.

A

Dredging

43
Q

The flow of seawater in the horizontal direction that accompanies a tidal variation of sea level and is thus periodic.

A

Seiche

44
Q

The return current toward the sea is called

A

Ebb current

45
Q

The period during which the current is negligible while it is changing directions is called ________

A

Slack Water

TRANSPORTATION ENGINEERING (7 decks)

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