Showing posts from December, 2012

Kinematic And Dynamic Viscosity

What is viscosity? Defined as the resistance of fluids to change of shape, being due to the internal molecular friction of…

ACTIONS IN CASE OF COLLISION

Action in case of ship collision First of all raise the emergency alarm Reduce main engine speed and stop the main engin…

SPECIAL AREAS AS PER MARPOL

Special Areas Under MARPOL       The MARPOL Convention defines certain sea areas as “Special Areas” in which, for technic…

Lead Acid Batteries

It produces electrical energy from a reversible chemical reaction. A lead acid battery cell consists of two lead plates, …

OBJECTIVE QUESTIONS ( INDUCTION MOTOR)

1.The induction motors have .........power factor. (a) zero                                                      (b) u…

How a vernier caliper works?

Principle of the vernier scale is that a certain number of divisions(n) on the vernier scale is equal in length to a diffe…

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