PDF chapter test TRY NOW

Give brief answers to the following question:
 
While driving what are the tips we must follow to save petrol / diesel / natural gas?
 
The following tips we must follow to save petrol / diesel / natural gas as below:

(i). Ensure correct air in the tyres.

(ii). Ensure of the vehicle.

(iii). Drive at a constant and moderate as far as possible.

(iv). Switch off the at traffic lights or at a place where you have to wait.