GATE2018 CE-1: 14

Question

A bitumen sample has been graded as $\text{VG}30$ as per $\text{IS:}73-2013$. The $'30'$ in the grade means that

• A. penetration of bitumen at $25^{\circ}C$ is between $20$ and $40$
• B. viscosity of bitumen at $60^{\circ}C$ is between $2400$ and $3600$ Poise
• C. ductility of bitumen at $27^{\circ}C$ is more than $30$ cm
• D. elastic recovery of bitumen at $15^{\circ}C$ is more than $30 \%$

Answer 1

Answer is B