The variation of atmospheric potential is caused due to :

change in the density of air

difference in temperature over the surface of the earth

Both (A) and (B)

Neither (A) nor (B)

Correct Answer : Both (A) and (B)

Recently Updated in Docks and Harbours Questions

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

1.2 H to 1.25 H above the high water level

1.2 H to 1.25 H above the datum

1.2 H to 1.25 H above the mean sea level

1.2 H to 1.25 H above the low water level

Correct Answer : Option (A) : 1.2 H to 1.25 H above the high water level

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

(i) and (ii) are correct

(ii) and (iv) are correct

(iii) and (iv) are correct

(i) and (iii) are correct

Correct Answer : Option (C) : (iii) and (iv) are correct

If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is_______.

0.15 √F

0.20 √F

0.34 √F

0.42 √F

Correct Answer : Option (C) : 0.34 √F