Given the following Assertion 'A' and the Reason 'R'; the correct option is
Assertion A: Phosphorous removal in steel making is favoured by basic slag.
Reason R: Basic slag decreases the activity of P2O5 in the slag.
A. Both A and R are true and R is the correct reason for A
B. Both A and R are false
C. A is true but R is false
D. Both A and R are true but R is not correct reason for A
Answer: Option C
This Question Belongs to Metallurgical Engineering >> Steel Making In Metallurgy
Identify the incorrect statement with reference to L.D. steel making
A. The temperature of L.D. furnace is maintained at around 1600°C
B. The basicity of slag is maintained at around unity
C. Dephosphorisation and decarburisation should proceed simultaneously
D. High silicon hot metal may lead to sloping
The oxidising power of a steel making slag is dependent on the concentration of
A. CaO, because Ca2+ ions are oxidising to the elements
B. CaO, because O2- ions are oxidising to the elements
C. FeO, because Fe2+ ions are oxidising to the elements
D. FeO, because O2- ions are oxidising to the elements
Inclusion free steel are known as
A. Plain carbon steel
B. Clean steel
C. Alloy steel
D. None of these
A. a is false but r is true
B. a is true but r is false
C. a is true and r is also true, but r is not the reason for a
D. a is true and r is also true, and r is the reason for a
Join The Discussion