To calculate the free surface correction，it is necessary to

A tank containers should not generally be more than 95% full，______．

A.to allow for possible thermal expansion of the contents

B.to prevent dangerous surging movements in transit

C.to increase its weight

D.to change the free surface in it

Which statement about the free surface effect is TRUE ________．

A.It increases in direct proportion to the length of the tank times the breadth squared

B.It decreases at increased angles of heel due to pocketing when a tank is 90% full

C.It decreases in direct proportion to increasing specific gravity of the liquid in the tank

D.In practice，the correction is considered to be a virtual reduction of KG

AInsurance is necessary for our clients. ;

BI suggest a _Free of Particular Average Policy._ ;

CSure, but there is an extra premium for the buyer’s account.

When displacement increases，the free surface corrections for slack tanks ______．

A.increase

B.decrease

C.are directly proportional

D.remain unchanged

The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel's displacement into the ______．

A.Transverse free surface correction for the vessel

B.Sum of the vertical moments of the vessel

C.Sum of the longitudinal free surface moments of the vessel

D.Longitudinal centerline of the vessel

The free surface corrections depend upon the dimensions of the surface of the free liquids and the ______．

A.volume of liquid in the tank

B.displacement of the vessel

C.location of the tank in the vessel

D.height of the center of gravity of the vessel

Repairing damage to the hull of a ship at or above the waterline reduces the threat of ______.

A.free surface effects

B.capsizing the ship

C.continued progressive flooding

D.wind overturning moments

A vessel is wind rode when it is ______.

A.at anchor and heading into the wind

B.backing into the wind

C.carrying lee rudder

D.necessary to apply a leeway correction to the course