Automechanical Works Paper 2 WASSCE (SC), 2016

Question 14

 

        

  1. (a) (i)      Sketch a gear type oil pump.
    (ii)     Label three parts of the gear type sketched in 14 (a)(i).

    1. Indicate the direction of the gear rotation.

                  (b) (i)      Explain the operation of a gear type oil pimp.
    (ii)     State the function of an oil gallery.

Observation

(a)

 

 

            (b) (i)      The Operation of a Gear Type Oil Pump
It consists of two spur gears, one of which is driven by the camshaft which rotates inside a close fitting. Oil passes around the casing which is trapped in little quantity by each tooth and carried around the case before being discharged into the gallery.                                                                 

  1. The Function of an Oil Gallery

Oil gallery serves as the route through which discharged oil passes to some intricate parts of the engine.