95MEP-4
Sr. No. 7
EXAMINATION OF MARINE ENGINEER OFFICER
Function: Maintenance & Repair at Operational Level
MARINE ENGINEERING PRACTICE
M.E.O. Class IV
(Time allowed - 3hours)
India (2002) Afternoon Paper Total Marks 100
NB : (1)All Questions are Compulsory
(2)All Questions carry equal marks
(3)Neatness in handwriting and clarity in expression carries weightage
1.Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.
2.State the maintenance that would be necessary on a periodic basis of a simple pneumatic proportional controller.
3.Outline the routine of opening up a set of propulsion machinery for survey. List the checks and tests you would perform for recording purposes.
4.(a) State, with reasons, the causes of fatigue cracking of engineering components.
(b)State, with reasons, how material and design defects can influence fatigue life.
(c)With reference to engine bed plate transverse girders explain how the incidence of fatigue cracking can be minimized.
5.With reference to high pressure steam plant:
(a)State the gases that may be present in the feed system, explaining their presence and their effect.
(b)Explain how the plant is protected from the undesirable effects of the gases in (a).
6.Describe the operation of overhauling a two-stage reciprocating air compressor. Make particular reference to the methods employed to ensure correct running clearance on bearing and cylinders. State the tests necessary before the compressor is put back into service.
7.Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to ______.
(a)allow an alternate main pump to start in the fully loaded condition thus developing immediate full torque
(b)prevent either main pump from being hydraulically motored when idle by cross pressure flow
(c)prevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the system
(d)all of the above
Briefly Justify Your Answer
8.To convert a vane type hydraulic pump to a hydraulic motor, which of the following would have to be done?
(a)Double the casing thickness.
(b)Install an enlarged control ring around the rotor.
(c)Provide small springs between the vanes and the base of the vane slots.
(d)Provide one additional slot and vane.
Briefly Justify Your Answer
9.The follow-up gear on an electro-hydraulic steering gear ______.
(a)relieves excessive fluid pressure
(b)takes the pump off stroke when the desired rudder angle is attained
(c)synchronizes wheel position with the rudder position
(d)returns the rudder to midposition when the wheel is released
Briefly Justify Your Answer
10.In a refrigeration system, foaming of the crankcase oil may cause the ______.
(a)expansion valve to overfeed
(b)compressor to knock
(c)water regulating valve to fail
(d)crankcase drains to plug
Briefly Justify Your Answer
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95MEP-4
Sr. No. 7
EXAMINATION OF MARINE ENGINEER OFFICER
Function: Maintenance & Repair at Operational Level
MARINE ENGINEERING PRACTICE
M.E.O. Class IV
(Time allowed - 3hours)
India (2002) Afternoon Paper Total Marks 100
NB : (1)All Questions are Compulsory
(2)All Questions carry equal marks
(3)Neatness in handwriting and clarity in expression carries weightage
Answers
Answer for Question No. 7 Correct Answer : B
Answer for Question No. 8 Correct Answer : C
Answer for Question No. 9 Correct Answer : B
Answer for Question No. 10 Correct Answer : B