Correct option is A
The
Pensky-Martens apparatus is used to determine the
flash point and
fire point of bituminous materials. These tests are conducted to measure the temperature at which the bitumen emits vapors that can ignite (flash point) and sustain combustion (fire point).
Key Uses:
1.
Flash Point: The lowest temperature at which the bitumen produces enough vapor to form a flammable mixture with air.
2.
Fire Point: The temperature at which the vapor continues to burn for at least 5 seconds.
Other Options:
·
(b) Ductility: Ductility is measured using a ductility testing machine, not the Pensky-Martens apparatus.
·
(c) Viscosity: Viscosity is tested using viscometers like the Saybolt Furol viscometer or Brookfield viscometer.
·
(d) Penetration: Penetration is measured using a penetration test apparatus, where a needle is allowed to penetrate the bitumen.
Thus, the
Pensky-Martens apparatus is specifically used for testing the
fire point of bitumen.
