Mike’s boss has told him that the road sweeper is fitted with an AdBlue tank and that he should keep this topped up to ensure that it does not run dry.
What is the purpose of ad-blue?

Explanation: • It helps to reduce the smell of the material picked up in the roadside gutters: No, it does not go into the tank for sweepings.
• It helps to avoid any sweepings sticking to the inside of the tank and makes discharging it easier: No, it does not enter the same tank.
• It is a fuel additive which prevents the diesel freezing in low temperatures: It is neither a fuel additive nor does it prevent diesel from freezing.
• It enables the engine to run cleaner and meet certain low pollution criteria: Correct.

Category: CPC Case Studies: Technical Matters