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Function- 4b Second Engg Oral Question By Biswas 5th Sept 2012
chiefengineer
#1 Posted : Sunday, October 20, 2013 11:02:16 AM(UTC)
Rank: Member

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

Was thanked: 3 time(s) in 3 post(s)
5th Sept 2012 Mr Biswas and external

Function 4B:

1. What do u mean you mean by moment of inertia? Why do we need to calculate Moment of Inertia? Why do we prefer I section as load carrying members? Went deep into basics of bending moment, formulaes, etc.
2. Explain reliquefaction cycle of LNG. How the temperature of Nitrogen in the cooling cycle is reduced to cryogenic levels? What arrangement is provided to attain cryogenic temperatures?
3. Explain radial and axial turbines. What type of turbine is incorporated in the Main Engine turbocharger?
4. What type of oil mist detectors are used in Auxiliary generators? Can we replace main engine mist detector with that of aux engine? If not, why?
5. How is the weight of the shaft and impeller of a vertical centrifugal pump supported?
Function 6
1. Detailed procedure for assembling purifier vertical and horizontal shaft. How to measure height of Shaft? What is self aligning casing? What do the composite springs make contact with?
2. How is feathering of safety valve carried out? How is safety valve pressure set in presence of surveyor? How is safety valve gagged (he went into unbelievable silly details)?
3. Where are butterfly valves fitted and why ? How will you overhaul such a valve to replace the leaking seal ring?
4. What maintenance to be carried out on transverse bracing of main engine? How does a transverse bracing damp vibrations?
5. Explain procedure of removing nuts of cylinder head. How are the hydraulic jacks used? Why do we need to slacken the hydraulic jack half turn after tightening it on the thread of the bolt?
Will Post answers soon. I cleared func 6.
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