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Meo class4 oral question bank

Question bank for motor function .. these are very basic questions for 4b .more usefull for

beginner who are giving 1stattempt.

Given by c/e kundra sir.compiled by raminder sood

Motor question bank

M1 2 stroke timing diagram (cycle)?

M2 Difference between 2S and 4S engine ?

M3 Different parts of engine?

M4 What is long stroke and super long stroke. Advantage of long strokes?

M5 Why 2S engines are preferred for marine propulsion. Why 4S is preferred for generator?

M6 Shape of piston crown? Why shape is concave and convex?

M7 Why piston dia. Reduced at top?

M8 How sealing takes place in piston ring?

M9 What all clearences will you check for piston ring. And how will u check?M10 How will you decide piston ring to be changed or not?

M11 What is scuffing?

M12 What all you check during piston overhaul?

M13 Function of stuffing box. And diaphragm?

M14 How you will replace liner .how will you gauge liner ?rate of liner wear?where it is maximum?

M15 Cylinder lubrication arrangement for vessel?

M16 How we know sufficient lube oil is supplied?

M17 How will you come to know exhaust valve is leaking?

M18 Draw fuel valve and how to overhaul?

M19 Lubrication system.main lub oil system?(both me and aux engine)

M20 Function of tie rod?M21 What will you do In case of scavenge fire?

M22 What will you do in case of crankcase high alarm?

M23 Omd alarm working .relief vv working?

Generator question bank

G1 v/v timing diagram of 4s ? (generator)

G2 Difference in timing of aspirated and non aspirated engines?

G3 Starting system for generator?

G4 How to check tapet clearences ?how to adjust?

G5 What is vec?

G6 How thrust is absorbed in 4s engine?G7 Difference in governor of 4s and 2s engine?

Engine and performance

E1 Calculation of power from indicator diagram?

E2 Type of indicator diagram and use?

General

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Gg1 Fuel oil line diagram?

Gg2 Starting air line diagram?

Gg3 Cause of air starting explosion?

Gg4 Cause of crankcase explosion?

Gg5 What protections are provided for c/c explosion?

Gg6 Overlapping in air starting system?what is purposeGg7 TBN values of all l.o?why it is diff for me and aux engine?

Gg8 Cranckcase inspection?

Boiler

B1 Advantage of water tube boiler?

B2 How to blow thru boiler gauge glass?

B3 Safety on boiler gauge glass?

B4 Improved high lift safety v/v working?

B5 Function of easing gear?

B6 What is provided to avoid tampering of safety vv?

B7 What is accumulation pressure?why it is use?how to check it?B8 How presence of oil is detected in boiler water?

B9 What will you do if you find oil in hotwell/cascade tank?

B10 Hydraulic testing of boiler?

B11 Prepare boiler for survey?

B12 How to fire boiler from cold?

B13 Tests carried out in boiler water. What are limiting values of these tests?

B14 What is water hammer. How to avoid it?

B15 Why PH value of condensate is different from boiler water?

Purifier

P1 How to change purifier to clarifierP2 How to select gravity disc?

P3 Purifier overflow reason? What action will u take?

P4 Purifier speed not building after start why?

P5 What is pairing disc?

P6 What all imp parameters in purifier?

Steering gear

Sg1 Type of steering gear

Sg2 What is fail safe arrangement?

Sg3 Cause of hunting ? what is hunting gear?

Sg4 Function of relief vv and bypass vv? How much relief vv ?Sg5 Why hard over angle is 35* max?

Sg6 Function of steeing gear?

RAC

R1 Block diag of plant with condition of gas at each stage?

R2 What safety devices are provided in plant?

R3 Mechanical seal explain?

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R4 H.p cut out reason? Wht to do?

R5 Reason for short cycling?what to do?

R6 How to charge oil? How to charge gas?

R7 Working of TEV?

R8 How to check leaks in system?

Air compressor

A1 Why we use multistage compressor?

A2 Function of intercooler and after cooler?

A3 Difference between pr gauges of a/c system and refer system?

A4 What is bumping clearance ?how to take this clearance? Action to take ?

A5 What happen if lp suction vvleaks?

A6 What happen if lp discharge vv leaks?

A7 What happen if hp suction vv leaks?

A8 What happen if hp disch vv leaks?

A9 Safety devices on air comp?

A10 Fusible plug on air bottle ?

All above question are useful for 4b oral preperations and help you clearing and understanding

4b-motor

Best wishes for all candidates appearing for meo class4

Any doubt u can reach me on fb-@raminder sood