MEO class 4 Objective question papers solved.| Part1

Q- Which of the following will lead to automatic stopping of IG blower?
a. Low water level in deck water seal.
b. Oxygen content above 8%.
c. Low water level in scrubber tower.
d. High water level in scrubber tower.
Answer-A & C 

Q-Which of the following will be required to be done in order to reduce sulphur corrosion of Main Engine components
A. Increasing the atomization pressure of fuel injectors
B. Fitting exhaust valves with valve rotators
C. Running engine at or near normal sea load
D. Decreasing the F.O. purifier feed rate , running two purifier in series one acting as purifier and other as calrifier

Q- Viscosity of fuel oil used for ME was 145cst,new fuel comes whose viscosity was more than earlier, what should u do
a) increase temp setting
b) change setting of viscotherm
c) do nothing
d) open steam valve manually more
Answer-Critical Question(it could be anything)

Q- Main engine is running but viscosity of fuel cannot be maintained.fuel oil heater have a maximum rating of 4 bar steam pressure.steam through a pressure reducing valve is provided to the heater at 4 bar but still viscosity of fuel annot be brought down below 20 cst. as a good marine engineering practice what will you do?
a. let the engine run at same rpm n wait for the port to come to carry out the cleaning of heater
b. reduce the rpm till next port arrives n then clean the heaters
c. increase the steam pressure by adjusting the setting of steam reducing valve
d. stop the engine n clean the heaters

Q-When one of the M/E.F.O. heater is not in use then
A) The F.O. inlet n outlet valve should b kept shut, but steam heating valves should b kept crack open so as to keep the heater warm.
B) F.O. inlet n outlet valve should b kept shut n heating valves also should b completely shut n should b drained of any remaining F.O.
c) F.O. inlet n outlet valve should b kept crack open so that the F.O. recirculation can take place.
d) F.O. inlet n outlet valve should b kept shut while outlet valve should be left open so that

Q- how diesel engine governing limit
a. load limit
b. scav limit
c. torque limit
d. all

Q-The main causes of failure of the cylinder head of a large 2 stroke marine diesel engine are
(a) Excessive rigidity.
(b) Small core holes.
(c) Thin uncooled walls.
(d) Excessive rolling and pitching
(e) Excessive tightening of cylinder head nuts.
Answer-C and D

Q- New liner we are putt in a ring in skirt made of
A one piston ring
B bronze ring, multiple piece
C cast iron, single piece
D piston ring, multiple pieces
Answer-B(Because the main function for that ring is to if any misalinghment of piston so skirt will touch the liner so if u provide this wear ring it want allowed to touch liner and it is made up by soft material and even if wear ring will touch the liner it wont damage the liner)

Q- Sea water outlet temperature of LO cooler decreased while main engine load and sea water inlet temperature not changed this indicates
a.Cooler efficiency has increased
b.Cooler efficiency has decreased
c.Sea water outlet temp nothing to do with efficiency
d.The flow of sea water reduced

Q- Cold corrosion occurs in the middle part of the liner of main egine. What constructional features can be applied to it for reducing this.
A . no constructional feature can be applied only increase feed of cylinder oil or use a oil with high tbn and maintain jacket water temperature as high as possible.
B even after doing A there will be some corrosion which cannot be avoided so no constructional feature other wise.
C putting an insulation between dulinder liner outside and in the bores to avoid any corrosion.
D maintain low jacket water flow rate to avoid turbulence and corrosion

Q- liner crack indication
a. loss of water frm expansion tank
b. black smoke coming from expansion tank
c. jacket water fluacuating

Q- The machinery which is usually tested first once the ship reaches a dry dock is
A. Engine room crane
B. Engine room lift
C. Gantry crane for engine room
D. All of the above

Q- What is mixed lubrication?
A mixing additives to lube oil
B mixing of water with lube oil.
C where the lube oil film is partly eshtablished.
D where there is certain deformation in the mating surfaces and lube oil film is established.

Q- In case of modern 2-stroke, crosshead type, marine diesel engines, the cooling oil for piston crown cooling is provided:
a Through Telescopic pipes
b Through Spray nozzle provided on top of the con-rod
c Through hollow piston rod from crosshead
d Through splash cooling similar to liner lubrication

Q- You see white smoke coming from the ME funnel stack, this could be
a)one or more cylinders not getting enough fuel
b)too low compression pressure
c)water in fuel
d)all of above

Q- Primary purpose of an indicator cock
a. Remove soot exhaut gases aftr stopping the engine.
b. Take an indicator diagram aftr removing ext gases take an performance of engine.
c. Realease excess pressure
Answer-A not B(Because Primary Purpose is Blow through Before Starting an Engine)

Q- The use of ball and roller bearings in internal combustion engines is becoming more and more popular for some or all of the following
(a) The low coefficient of friction
(b) The absence of wear under favorable conditions
(c) The independence in lubrication
(d) The extreme reliability of such bearings

Q- how diesel engine governing limit
a. load limit
b. scav limit
c. torque limit
d. all

Author marineGuru

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