Final answer:
Yes, knowing the flow rate of the tank discharge hose is crucial for a service technician to mix the correct chemical concentration in a spray tank.
Step-by-step explanation:
The statement that 'In order to mix proper strength spray in less than full tank lots, the service technician must know the flow rate of the tank discharge hose' is true. Knowing the flow rate is essential for calculating how much chemical to add to a spray mixture to achieve the desired concentration. When mixing chemicals in a tank that is not full, the amount of water is less, so the proportion of chemical-to-water must be carefully adjusted.
When discussing the flow-through of a ballast tank or the speed of water from a nozzleless hose, it's important to understand the underlying physics principles like fluid dynamics and mechanical motion. For example, achieving a stream that can reach a certain distance involves adjusting the speed and pressure of water emerging from a hose with varying nozzle diameters.
In the given example of a garden hose, the volume flow rate (a) can be calculated using the time and the volume of the bucket. The speed of the water coming out of the hose (b) is based on the flow rate and the cross-sectional area of the hose without a nozzle. To reach the flower bed 3.0 meters away (c), the speed of water must be enough to overcome gravitational forces and horizontal distance, which can be found using principles of projectile motion. Lastly, the diameter of the nozzle needed (d) depends on the desired speed and volume flow rate.