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Harbours – IES PYQ

      

21. Mean sea level at Indian ports and harbours has generally been established based on the analysis of tidal sea level fluctuations over which period ?

[IES 2008]

  1. 16 years
  2. 19 years
  3. 25 years
  4. 10 years
Answer: Option B
Explanation:
Mean Sea Level (MSL) at a location is the mean of hourly water level heights observed over a period of 19 years.

22. With a bit rate of 50 bps and a cycle time of 30 seconds the total information content of a navigation data set is _____ .

[IES 2009]

  1. 20 bits
  2. 100 bits
  3. 1500 bits
  4. 80 bits
Answer: Option C
Explanation:
Total information content = Bit rate x cycle time = 50 x 30 = 1500 bits

23.  Assertion (A): In the overall design and layout of a harbour (or port), differentiation is made between ‘entrance’ and ‘channel’ depths. 

Reason (R): The ‘scend’ (or pitching) of a vessel may be larger at the entrance to the channel than within the channel. 

[IES 2010]

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not a correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer: Option A
Explanation:
As the entrance is more exposed to waves, pitching of a vessel will be larger at entrance to the channel than within the channel. Hence, depth and width required at entrance are more than those required in the channel.

24.  Which of the following complete sets do not recommend the siting of a harbour layout in that vicinity ?

  1. Submarine canyon
  2. Lee on an island
  3. Closely located promontories
  4. Indentation coves on the coastline
  5. Hooked bays with non-so-rugged rocky bottom

[IES 2011]

  1. 1, 4 and 5 only
  2. 2, 3 and 4 only
  3. 3, 4 and 5 only
  4. 2, 3, 4 and 5
Answer: Option C
Explanation:
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