MEP- Marine Engineering Practice online questions for MEO class 4

 1.For the S.W. side of a M/E L.O. cooler it is noticed that rise in S.W.temperature through the cooler has decreased from 12 deg. C to 7 deg. C over a period of time, while the drop in temperature of L.O. across the cooler has also decreased.All other coolers have been reported to be working normal & M/E is also running at a constant load in calm weather.What is the inference drawn by decrease in the temperature difference?
A. The cooling S.W. inlet temperature has reduced
B. The efficiency of the cooler has increased over a period of time
C. The cooler has become dirty on the S.W. sideor L.O. side
D. S.W. side of the cooler may be partially blocked with mud and sea shells

2.Centrifugal pumps cannot handle air and require priming.But you are aware that centrifugal which on the same principal can handle air very well. Which two properties of air are responsible because of which the centrifugal pumps cannot handle air:-
A. Fluidity only
B. Density only
C. Both fluidity and density
D. Compressibility

3.Which of the following can lead to premature failure of roller bearings?
A. Misalignment
B. Contamination
C. Shrinkage
D. Over greasing

4.Surface preparation of steel surfaces , prior carrying out painting is
important because (choose the best alternative) :
A. Any rust and contaminant inclusions may cause local paint film breakdown
B. Too much paint will be consumed if surface preparation is not carried out
C. Surface will be very rough if proper surface preparation is not carried out
D. Surface preparation deposits a chemical onto steel surface which reacts with paint film and causes
strong bonding

5.Vacuum priming pumps which work on the principle of fixed vane pumps require _____________ for___________ clearance between vane tips and casing. 
A. Lube oil, lubricating 
B. Lube oil, sealing 
C. Water, sealing 
D. Gland packing, sealing

6.The flow rate through a F.O. transfer pump will not be affected by which of the following factors? 
A. Low F.O. temperature 
B. Low sounding in F.O. tank 
C. Internal leakage within the pump 
D. Leaking discharge valve

7.Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using high sulphur fuel oil :- 
A. Increasing cylinder oil feed rate 
B. Using high TBN cylinder oil 
C. Increasing scavenge air temperature 
D. Decreasing cylinder oil feed rate

8.The suction pressure gauge of the Engine room bilge pump is brokenand you don???t have a spare. Chief Engineer has asked you totroubleshoot the problem with Bilge pump not taking suction from Fwd.(P) bilge well. You try taking suction from Fwd. (S) & Aft Bilgewell and find that pump is taking good suction. Thereafter you Try suction from Fwd. (P) bilge well for sometime after priming with Sea Water but there is no change in level. You inspect the suction filter of the pump and find that it is very difficult to remove the same,you had to apply too much of force to lift the filter cover while normally it comes out easily. What does it indicate?
A. It does not indicate anything, sometimes the filter covers are difficult to remove.
B. It indicates that the suction valve of the Fwd. Bilge Pump is leaking
C. It indicates that the suction filter of the Fwd. (P) bilge well is clogged completely
D. Pump suction filter might be clogged

9.Pump driven clutch type attached vacuum pumps are commonly used for priming ballast pumps and emergency fire pumps. What is the factor which clutches the vacuum pump clutch to the pump clutch during start of the pump?
A. Low suction pressure acting against the spring loaded clutching piston
B. High suction pressure acting against the spring loaded clutching piston
C. Low discharge pressure acting against the spring loaded clutching piston
D. High discharge pressure acting against the spring loaded clutching piston

10.It is given that engine room bilge pump has suction manifold on which 3 valves are located. One valve for the 3 engine room bilge wells suction, another one for Bilge tank suction and the third one is for sea water suction. It is found that the Bilge pump is unable to take suction from any of the bilge wells, but is able to take suction efficiently from Bilge tank. What is the most probable cause?
A. Pump suction filter cover gasket leaking
B. Suction filter cover gasket of one of the Bilge wells is leaking
C. Bilge well suction pipeline leaking between individual bilge well valves and suction manifold valve
D. Bilge pump suction pipeline leaking between the manifold and the pump

11.Chromium is a nobler metal when compared to that of steel . In some marine applications Chromium is electroplated to the steel surfaces . Why?
A. Chromium is a more noble metal so it will not get corroded and thus steel surfaces will remain protected
B. Chromium plating provides corrosion protection as well as high glossiness and high hardness for better wear resistance and reduced friction to the steel surfaces 

C. Chromium plating is required for providing high glossiness and high hardness for better wear resistance and reduced friction to the steel surfaces and not for corrosion protection
D. Chromium reacts with steel to form an alloy during electroplating which is corrosion resistant

12.Correct method of greasing a centrifugal pump bearing is:
A. To pump the grease until you feel high back pressure on the Grease pump
B. To pump the greasefor 3-4 pumping strokes of Grease pump for each bearing
C. To pump the grease when the pump is stopped and drain any old grease at the same time by opening the drain plug, giving only 3-4 pumping strokes on Grease pump for each bearing. the drain plug should then be replaced
D. To pump the grease when the pump is running and drain any old grease at the same time by opening the drain plug,until all the old grease is removed and new grease starts coming out of the drain, repeating samefor each bearing. the drain plug should then be replaced

13.It is given that engine room bilge pump has suction manifold on which 3 valves are located. One valve for the 3 engine room bilge wells suction, another one for Bilge tank suction and the third one is for sea water suction. It is found that the Bilge pump is unable to take suction from any of the bilge wells, but is able to take suction efficiently from Bilge tank. What is the most probable cause?
A. Pump suction filter cover gasket leaking
B. Suction filter cover gasket of one of the Bilge wells is leaking
C. Bilge well suction pipeline leaking between individual bilge well valves and suction manifold valve
D. Bilge pump suction pipeline leaking between the manifold and the pump

14.WHICH PROCESS IS NOT DONE ON MILD STEEL ..???? 

A. hot plating, 

B. electrolysis, 

C. explosion bonding, 

D. metal spraying

15.Increasing the rotational speed of a cargo pump the pump flow rate will: 
A. Increase in direct proportion to the increase in speed 
B. Decrease in direct proportion to the increase in speed 
C. Flow rate doesn???t depend upon speed 
D. Flow

17.A ball valve was found leaking in service. Upon inspection it wasfound that the PTFE seat had worn out and was renewed. The valvestopped leaking in closed condition. How do think a ball valve
provides perfect sealing?
A. The seat fitted is slightly smaller than the outer dimensions of the ball, thus providing interferencefit when closed
B. Either a floating seat is pressed onto trunnion supported ball by liquid pressure or floating ball is
pressed onto the seat
C. Ball is not exactly spherical and is shaped such that during closure the surface coming into contact
with seat is of slightly bigger diameter providing sealing
D. Seat is not exactly spherical, but slightly tapered so that during closure the ball sits tightly on the
seat

18.The ballast valve of the fore peak tank is located in the duct keel andcannot be opened or shut by remote operation. The valves of othertanks can be operated remotely without any trouble Which of the
following will be the best practice?
A. Valve should be checked locally for troubleshooting without which it is difficult to find the exact problem
B. The actuator must be defective and should be replaced with a new one
C. The control circuit is defective and the PCB should be replaced
D. Shore assistance will be required in such cases

19.It has been reported that Engine room bilge pump was unable to take suction from Fwd. (P) bilge well while it taking suction efficiently from Fwd.(S) & aft bilge wells. What could be the most probable cause?
A. There is leakage in the bilge suction pipeline somewhere between the bilge wells and bilge pump
B. The Fwd. (P) bilge well suction valve might be leaking 

C. The Fwd. (P) bilge well suction filter cover gasket might be leaking
D. The pump needs to be overhauled

20.Which of the following is a correct point for sampling of system lube oil for on board or shore analysis?
A. Standpipes
B. Purifier outlets
C. Inlet or outlet of L. O. coolers
D. Tank drains