Marine Auxillary 2007 Objective Paper


Q- The pumps performance depends upon

A. Clearance between the wear ring and the impeller

B. Clearance between the impeller and the casing

C. Clearance between impeller and shaft

D. Clearance between mechanical seal and shaft

Answer-B


Q- Mechanical seal are not used in ...

a.LIQIUD LINE

b.LIQUID WITH VAPOUR LINE

c.LIQUID WITH DIRT LINE

d.ALL OF THE ABOVE

Answer-B


Q- A pump being used to deballast for peak tank which is full, it it seen that suction pressure is Positive and this pressure is very low compared to rated discharge head, it indicates that

a. Pump is not operating satisfactorily n pump capacity is too low

b. Pump is not operating satisfactorily n Pumping capacity is higher than rated, Throttling of discharge valve is reqd.

c. Pumping capacity is not affected by suc n discharge pressure

d. Pump is operating normally

Answer-May be D Not Sure


Q- Which of the following can lead to premature failure of roller bearings?

A. Misalignment

B. Contamination

C. Shrinkage

D. Over greasing

Answer-D


Q- For a main engine fuel system which has a 5 micron filter ,a super decanter is usually fitted--

a)before the purifier

b)after the purifier

c)after the 5 micron filter to ME

d)before the horizontal clarifier

Answer-A


Q- Pump, when coupled to constant speed motor , the discharge quantity will not change with following pumps

A. heleshaw

B. steering gear swash plate type

C. Gear pump

D. None

Answer-C


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