11. At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be
a) 2.073 m
b) 8.169 m
c) 9.144 m
d) 6.8 m
b) 2 x Manoeuvring lane + 2 x Bank clearance lane
c) 2 x Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane
d) Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane
a) B or 30 m
b) 1.5 B or 50 m
c) 1.5 B
d) 50 m
where "B" is beam of the design vessel
a) The progress of work in low level method of mound construction is very slow.
b) Barge method of mound construction is economical.
c) In low level method of mound construction, the area of working is limited.
d) In staging method of mound cons-truction, the work is not interrupted even during stormy weather.
Reason R : Sea insects result in undermining of the hardest and the soundest building material. Select your answer based on the coding system given below:
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
a) Barge method
b) Staging method
c) Low level method
d) none of the above
a) requires skilled labour
b) requires low maintenance cost
c) requires less material
d) results in less damage due to gradual failure
a) mean range
b) maximum range
c) maximum rise
d) mean rise
a) 2.5 m
b) 4 m
c) 5 m
d) 7 m
a) 1.2 H to 1.25 H above the datum
b) 1.2 H to 1.25 H above the low water level
c) 1.2 H to 1.25 H above the high water level
d) 1.2 H to 1.25 H above the mean sea level
a) 2.073 m
b) 8.169 m
c) 9.144 m
d) 6.8 m
Ans: c
12. In a two lane channel, bottom width of channel is given by
a) Manoeuvring lane + 2 x Bank clearance laneb) 2 x Manoeuvring lane + 2 x Bank clearance lane
c) 2 x Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane
d) Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane
Ans: c
13. Minimum width of ship clearance shall bea) B or 30 m
b) 1.5 B or 50 m
c) 1.5 B
d) 50 m
where "B" is beam of the design vessel
Ans: a
14. Select the incorrect statement.a) The progress of work in low level method of mound construction is very slow.
b) Barge method of mound construction is economical.
c) In low level method of mound construction, the area of working is limited.
d) In staging method of mound cons-truction, the work is not interrupted even during stormy weather.
Ans: b
15. Assertion A : Marine structures are made specially bulky and strong.Reason R : Sea insects result in undermining of the hardest and the soundest building material. Select your answer based on the coding system given below:
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Ans: a
16. The most popular method of construction of wall breakwaters isa) Barge method
b) Staging method
c) Low level method
d) none of the above
Ans:
17. As compared to wall type breakwater, mound type breakwatera) requires skilled labour
b) requires low maintenance cost
c) requires less material
d) results in less damage due to gradual failure
Ans: d
18. The difference in height between highest high water and lowest low water is calleda) mean range
b) maximum range
c) maximum rise
d) mean rise
Ans: b
19. If the maximum spring rise is 2 m and height of the waves expected is 4 m , then the breakwater height above the datum will bea) 2.5 m
b) 4 m
c) 5 m
d) 7 m
Ans: d
20. If H is the height of the wave expected, then the height of the breakwater is generally taken asa) 1.2 H to 1.25 H above the datum
b) 1.2 H to 1.25 H above the low water level
c) 1.2 H to 1.25 H above the high water level
d) 1.2 H to 1.25 H above the mean sea level
Ans: c
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