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Q: In Pensky Marten test for Bitumen, a m omentary flash was seen at a temperature of 200’ Celsius and the bitumen burned for at least 5 second at a temperature of 240° Celsius. The flash and fire point of bitumen is ______ and ______ respectively.
  • A. 200° Celsius, 200° Celsius
  • B. 200° Celsius, 240° Celsius
  • C. 240° Celsius, 200° Celsius
  • D. 240° Celsius, 240° Celsius
Correct Answer: Option B - Flash point– • It is the lowest temperature at which the application of a test flame causes the vapors of the binder to catch on instant fire in the form of a flash under specified test conditions. • In the bitumen test, momentary flash was seen at a temperature of 200°c Fire point– • It is the lowest temperature at which the application of test flame causes the binder material to ignite and burn at least for 5 seconds under specified test condition. Here, bitumen burned at a temps of 240° Celsius.
B. Flash point– • It is the lowest temperature at which the application of a test flame causes the vapors of the binder to catch on instant fire in the form of a flash under specified test conditions. • In the bitumen test, momentary flash was seen at a temperature of 200°c Fire point– • It is the lowest temperature at which the application of test flame causes the binder material to ignite and burn at least for 5 seconds under specified test condition. Here, bitumen burned at a temps of 240° Celsius.

Explanations:

Flash point– • It is the lowest temperature at which the application of a test flame causes the vapors of the binder to catch on instant fire in the form of a flash under specified test conditions. • In the bitumen test, momentary flash was seen at a temperature of 200°c Fire point– • It is the lowest temperature at which the application of test flame causes the binder material to ignite and burn at least for 5 seconds under specified test condition. Here, bitumen burned at a temps of 240° Celsius.