Subtopic: Bio-fuels and their use in farm mechanization
Question Statement:
Compared to petroleum diesel, pure biodiesel (B100) exhibits which combustion and property characteristics?
Options:
(A) Higher oxygen content (~10–11% by weight), resulting in lower particulate emissions
(B) Slightly lower lower-heating value (calorific value by ~8–10%)
(C) Higher flash point, improving safety during storage and transport
(D) Lower cloud point and pour point than petroleum diesel
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
Biodiesel contains ~11% fuel-bound oxygen, reducing soot. It has slightly lower energy density and higher flash point. However, its pour point is higher (worse cold-flow behavior).