Auto Mechanics Paper 2,Nov/Dec 2011.  
Questions:   1 2 3 4 5   Main
General Comments

Question 5

(a)        (i)         Sketch a 4-speed sliding mesh gear arrangement with third speed                            engaged.
            (ii)        Show the power path of the drive in the third gear.

(b)        Label the following parts of the sketch in (a)(i):
            (i)         input shaft;
            (ii)        main shaft;
            (iii)       constantmesh gear;
            (iv)       lay shaft.

           (c)        State two demerits of sliding mesh gearbox.


gave wrong answer to the various parts of the question.  The required answers to the various parts of the question are:

(a and b)


(c)        The demerits of sliding mesh gearbox are:
-           nosier in operation;
-           difficult to engage the gears i. e. requires skills in double declutching;
-           gears wear faster due to frequent crash;
-           bulkier in construction.

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