Question

Ash content of a diesel fuel oil should NOT exceed
1. 1%
2. 0.50%
3. 0.10%
4. 0.01%

Answer 1

Correct Answer - Option 4 : 0.01%

Explanation:

Ash

• Ash is the non-combustible material in fuel oil.
• It can be present as either solid material or oil or water-soluble metallic compounds.
• These solid particles are the same as those often designated as sediments.
• The concern for fuel systems is that these solid particles can result in wear and erosion ultimately resulting in substandard or failing performance.
• Diesel engine injectors are precision made and therefore are quite sensitive to any abrasive material in the fuel.
• Since the ash content is directly related to the wear of the injection system, it must be kept quite low.
• For example, diesel fuel No. 1-D has a maximum allowable ash content of 0.01%. T
• he method of determining the ash content has been standardized as ASTM D482