(i) Working Principal of mechanical governor of FIP:

The working principle of mechanical governor is illustrated in figure. When the engine speed tends to exceed the limit the weights fly apart. This causes the bell crank levers to raise the sleeve and operate the control lever in downward direction. This actuates the control rack on the fuel-injection pump in a direction which reduces the amount of fuel delivered. Lesser fuel causes the engine speed to decrease. The reverse happens when engine speed tends to decrease.

(ii) Types of Nozzles:

1) Single hole nozzle

2) Multi-hole nozzle

3) Long stem nozzle

4) Pintle nozzles

5) Pintuax nozzles