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Marine engineering practice e-pariksha online questions

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
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.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

3.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

4.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

5.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

6.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

7.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

8.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

9.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
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

11.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

12.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

13.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

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

15.After maintaining correct discharge pressure , soon ceases to discharge water what are possible
A. Pressure gauge wrong
B. Pump sucking air
C. Discharge valve throttled
D. Casing wear ring is worn

16. Which of the following V/V cannot be overhauled in place without removing piping?
A) BallValve
B) Diaphragm valve
C) Globe valve
D) Butterfly valve

17. Copper tubing is used in refrigerant system because
A) It has less internal resistance
B) It is cheaper compared to other materials.
C) It is easier to check leaks in copper based system
D)None of the above

18. When pressure inside a system falls below that of the vapour pressure of the liquid
Cavities r formed, cavities travelling to high pressure region collapses releasing
Considerable energy damage the metal surface which is known as
A) Cavitation
B) Erosion
C) Impingment Corrosion
D) Cavitation Erosion

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