water can cause several types of problems in a high pressure fuel injection system. Within reasonable and fairly broad limits, warmer fuel is better than cooler fuel. Some systems use a loop off the radiator system to help warm the fuel. No need to cool the fuel, especially with direct contact water.
Answer: Explanation: Application of the bernoulli's equation comes in from conservation of mass flow. The cross sectional area of the two pipes are calculated. from A = πD²/4
The velocity of water from conservation of mass flow is also calculated ; V2 = Ac1V1/Ac2
The Loss coefficient is then calculated from KL = (1 - Ac1²/Ac2²)²
Then the head Loss (hL) is calculated The detailed calculated and appropriate steps is as shown in the attached files.