Q1. Describe how each of the following procedure may be accomplished by bridge control equipment for a direct reversing 2 stroke diesel engines - Setting the direction of rotation; Starting; Controlling speed
Q6. a) For a large slow speed direct reversing engine, describe in detail the profile of a cam suitable for fuel pump operation in either the ahead or astern mode
b) With respect to cam material, describe the heat treatment employed during manufacture.
c) Explain how the position of the cam relative to the crankshaft is altered when changing from ahead to astern running,
d) State how the position of the cam would be correctly set if it were replaced.
Q7. a) What are the various methods used for reversing the motion of ship. (4)
b) With respect to reversing of main engine running direction. Explain following.
i) Lost Motion. (4)
ii) Axial shifting of cams. (4)
iii) Roller Displacement. (4)
Q9. a) For a large slow speed direct reversing engine, describe in detail the profile of a cam suitable for fuel pump operation in either the ahead or astern mode. (6)
b) With respect to cam material, describe the heat treatment employed during manufacture. (5)
c) Explain how the position of the cam relative to the crankshaft is altered when changing from Ahead to Astern running. (5)
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