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2012 Second Engineer Oral Questions By Pakhrashi
chiefengineer
#1 Posted : Sunday, October 20, 2013 10:46:18 AM(UTC)
Rank: Member

Groups: Registered
Joined: 10/17/2013(UTC)
Posts: 25

Was thanked: 3 time(s) in 3 post(s)
orals at dgs 27/02/2012 1000hrs
3rd attempt...only fun 5
mr pakhrashi alone

first he asked me ...normally all guys clear this function first how come this is your last function...told him before attempts concentrated only on safety and motor general
he said ok...checked writtens cleared...ok good
what were the questions asked in ur previous attempt?
i told him he asked me how electricity is produced on board?
ok tell me how induction motr stator is wound to produce rmf?.....made the diagram as given in mcgeorge..and gave some funda as to how winding is such that rmf is produced...he said ok..tell me how induction motor works...told him as per faradays law and lenzs law...
ok what is lenz law....told him as per reeds
ok so is this synchronous motor?...told him no because in sync mototrs rotor rotates at syn speed..
ok what types of rotors u seen on board...sq cage and wound rotor
have u done drydock?....no
what all u check in shore connection...told him V and F
what will happen if voltage is 380 insted of 440..told him use step up transformer
why/....told him because motor might run slow or stall
ok what abt low frequency....use rotary condensor
what is that?...dont know
how u check if cable used by shore is rated for that amperage....dont know
where is pole change motor used...winches and windlass
what is there to prevent overload of such motor....slipping clutch
how does it work...same as in purifier
how pole change motor works?....told him as per mcgeorge

thx to class4exam.com
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