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by sankar_mariner
Thu Sep 12, 2013 6:30 am
Forum: Training Room
Topic: Life Boat
Replies: 12
Views: 9623

Re: Life Boat

but centrifugal brake is fitted to restrict the speed of descent to 36 m/min.
which is a safety feature incorporated to prevents the operator from lowering the life boat too quickly.
by sankar_mariner
Wed Sep 11, 2013 9:25 am
Forum: Training Room
Topic: Life Boat
Replies: 12
Views: 9623

Life Boat

Please explain how the life boat is protected from falling back into the water
if the power fails when hoisting the lifeboat.


Thanks.
by sankar_mariner
Thu Sep 05, 2013 10:54 pm
Forum: Training Room
Topic: Diode & Rectifier
Replies: 1
Views: 1613

Diode & Rectifier

4 marks Question.
With Reference To A.C generator please Give an explanation for DIODE and RECTIFIER.


Thanks.
by sankar_mariner
Thu Jun 27, 2013 4:51 am
Forum: Training Room
Topic: Induction Motor
Replies: 0
Views: 1604

Induction Motor

With reference to the rotor of an induction motor please explain how rotor leakage flux takes place
and its effect on motor operation ?

:D Special thanks to Big Pete and D Winsor for answering my previous questions.


Thanks
by sankar_mariner
Wed Apr 24, 2013 6:39 am
Forum: Training Room
Topic: Induction Motor
Replies: 2
Views: 2550

Induction Motor

with reference to the constructional details of a squirrel cage rotor as fitted in an induction motor
please explain why some rotors have a DOUBLE CAGE.

Thanks
by sankar_mariner
Sat Feb 16, 2013 4:52 am
Forum: Training Room
Topic: Braking of a.c. induction motor
Replies: 1
Views: 1821

Braking of a.c. induction motor

with reference to braking of a.c. induction motors please explain why electrical braking ( Plugging or Dynamic ) is preferable to mechanical braking.

Thanks.
by sankar_mariner
Wed Feb 13, 2013 7:09 am
Forum: Training Room
Topic: Regarding A.C generator
Replies: 1
Views: 1944

Regarding A.C generator

Please explain why the usual arrangement is to have stationary A.C windings and rotating poles ? ( for reasons other than high maintenance of slip ring and lower power to weight ratio )

Thanks.
by sankar_mariner
Mon Feb 11, 2013 2:01 am
Forum: Training Room
Topic: Scuppers and Bulwarks
Replies: 0
Views: 1897

Scuppers and Bulwarks

* why scuppers are located in close proximity to superstructure where as freeing ports are generally located at open areas of the weather deck. * why oil tankers have ship's side guard rails abreast of cargo tanks for reasons other than the safety of personnel. *what is the difference between open b...

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