SQL FOR DATABASE CONSTRUCTION QUIZ

Assertion A : Depth and width required at the entrance to a harbour are more than those required in the channel.Reason R : The entrance to a harbour is usually more exposed to waves as compared to the harbour itself.Select your answer based on the coding system given below:

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

A is false but R is true.

Both A and R are true but R is not the correct explanation of A.

TRUE ANSWER : ?
YOUR ANSWER : ?

As compared to wall type breakwater, mound type breakwater

Requires less material

Requires low maintenance cost

Requires skilled labor

Results in less damage due to gradual failure

TRUE ANSWER : ?
YOUR ANSWER : ?

When a ship floats at its designed water line, the vertical distance from water line to the bottom of the ship is known as

Free-board

Beam

Draft

Depth

TRUE ANSWER : ?
YOUR ANSWER : ?

As per Berlin's formula, the length of wave in meters is given by(Where ’t’ is the period in seconds for two successive waves to pass the same section.)

1.5612

1.7412

1.3412

1.9412

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion A : Large size stones are required in stone revetment in shore protection.Reason R : Resistance of stone to wave force is proportional to its volume and wave force is proportional to the exposed area of the stone.Select your answer based on the coding system given below.

Both A and R are true but R is not a correct explanation of

Both A and R are true and R is the correct explanation of

A is false but R is true.

A is true but R is false.

TRUE ANSWER : ?
YOUR ANSWER : ?

A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.

Floating dock

Wet dock

Refuge dock

Dry dock

TRUE ANSWER : ?
YOUR ANSWER : ?

By increasing the rise of lock-gates,<br/>(i) The length of the lock gate will increase<br/>(ii) Transverse stress due to water pressure on the gate will increase<br/>(iii) Compressive force on the gate will increase

(i) and (ii) are correct

(i) and (iii) are correct

Only (ii) is correct

Only (iii) is correct

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements in regard to Beaufort scale for wind speeds,(i) The Beaufort number ranges from 1 to 12.(ii) Higher Beaufort number indicates higher speed of wind,(iii) Beaufort number for calm is smallest and for hurricane is highest Of these statements

(i) and (iii) are correct

(i) and (ii) are correct

(ii) and (iii) are correct

(i), (ii) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

By increasing the rise of lock-gates, (i) The length of the lock gate will increase (ii) Transverse stress due to water pressure on the gate will increase (iii) Compressive force on the gate will increase

(i) and (ii) are correct

Only (ii) is correct

Only (iii) is correct

(i) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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 (iii) are correct

(ii) and (iv) are correct

(i) and (ii) are correct

(iii) and (iv) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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