Marine engineering Knowledge (General) class 4 online questions for e pariksha

1) which of the following valve is liable to open or close under pressure of fluid,if not locked in position?
A.gate valve,
B.globe valve,
c,plug valve,
D.butterfly valve

2) F.O. transfer pump was working efficiently, but it stopped taking suction suddenly. There is a
sounding of 6.0 m in the F.O. deep tank. The suction pressure gauge was renewed recently and is
showing a positive pressure when pump is running, but Pump is not transferring any F.O. What is
the most probable cause?
A. Pump is damaged and needs overhaul
B. Suction filter cover gasket might leaking
C. Pump relief valve might be leaking
D. The pump suction pipeline is blocked

3) Engaging the turning gear and turning the engine until working temperatures are reduced  
A.Blank starting air to the affected cylinder
B.Shut cylinder oil to the affected cylinder
C.Shut all cylinder liner ports of affected cylinder
D.Open relief valve of affected cylinder

4) Water carryover from boiler onboard through the steam causes
A.Erosion of the steam plant machinery
B.Low water level inside the boiler
C.Build-up of deposits on the steam plant machinery
D.None of the above

5) The coating on a electrode used for electric arc welding _________________
A.creates a gas shield to prevent oxidation of the weld material
B.helps the weld formation by shaping the metal transfer
C.provides an electrical insulation for the user
D.All of the above

6) A diffuser is provided at the end of a mechanical atomizer in boiler onboard
A.To prevent blow back of the flame
B.To mix the air and fuel properly
C.To prevent blow out of the flame
D.To eject the excess fumes from the atomizer

7) Steam stop valve is eased of its seat during boiler start up from cold
A.To allow thermal expansion of parts
B.To allow steam flow during start up
C.To prevent water hammer
D.All of the above

8) Duty of stand by person at the entrance of the enclosed compartment during enclosed space entry is
A.To alert others in case of untoward emergency
B.To provide first aid to injured person
C.To assist for the work carried out in the enclosed compartment
D.All of the above.

9) If the watchkeeping engineer encounters a Main Engine Slow down alarm he should____________________
A.Immediately cancel the slow down in the control panel
B.If navigation circumstances permit, after consulting chief engineer he should tell bridge to stop engine ,investigate the fault ,rectify it in consultation with senior engineers and then prepare for restarting the engine
C.He should raise engineer's alarm and wait for all engineers to reach the engine room
D.He need not take any action and wait for the alarm to resolve on its own and then cancel the slow down


10) Which of the following types of coatings used in tanks of a chemical carrier provides a comprehensive protection against most solvents?
A.Epoxy coatings
B.Polyurethane coatings
C.Zinc silicate
D.Phenolic resins

11) Presence of catalytic fines in fuel oil is significant to engineers on board because___________________________________
A.Catalytic fines tend to impair proper operation of purifiers
B.Catalytic fines lead to abrasive wear in liners , piston rings and fuel injection equipment
C.Catalytic fines necessitate increase in injection temperature
D.Catalytic fines necessitate increase in storage temperature

12) A partial opening of which of the following kinds of valves can lead to wire -drawing of its seat?
A.Globe Valve
B.Butterfly valve
C.Gate Valve
D.Full bore angle valve

13) Which of the following types of steam traps uses the pressure energy of the steam to close the outlet ?
A.Thermostatic trap
B.Thermodynamic trap
C.Mechanical trap
D.Vacuum trap

14) Sequential starting of machineries after black out in engine room is necessary
A.To prevent overload of Generators
BTo quickly restore the failed power supply in order
C.To prevent damage to machinery which has been switched off
D.All of the above

15) Positive displacement, helical gear pumps are well suited for pumping oil because
A.stuffing boxes eliminate the leakage problems usually associated with other gear pumps
B.it is not necessary to closely maintain design clearances this pump
C.they are essentially self-priming and produce a high suction lift
D.these pumps are designed with extreme tooth angle

16)  Scale formation in a fresh water generator evaporator can lead to ____________________
A.Impaired heat transfer
B.Reduced capacity
C.Increased shell temperature
D.All of the above

17) Salinity of distilled water produced from fresh water generator onboard depends on
A.Amount of feed set in fresh water production
B.Amount of salt water leaking from condenser if any
C.Temperature of the sea water used
D.Efficiency of brine ejector from the evaporator shell

18)  Prior to major overhaul of main engine onboard, the engine room crane is tested by
A.Operating the crane through the normal range
B.Testing of the crane with two sample ???abnormal??? conditions
C.Inspection of the crane hook and other safety arrangements
D.Stress testing of crane wire with peak loads

19) Which of the following is the material used for manufacturing tube plates of a shell and tube type heat exchanger?
A.Cupro-nickel
B.Aluminum Brass
C.Admiralty Brass
D.Gunmetal

20) A high pressure differential in a main engine fuel oil filter onboard can be best reduced by
A.Back flushing the filter manually
B.Stopping the main engine to change the filter element
C.Changing over to stand by filter if provided
D.None of the Above