Mohamad Afzal Khan

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Mohamad Afzal KhanGold

Asked: June 24, 2020In: Iron & Steel Making

Why metals cannot be extracted in pure form from their oxides?

Why metals cannot be extracted in pure form from their oxides?

Mohamad Afzal KhanGold

Asked: June 13, 2020In: Mineral Processing & Non-ferrous Metallurgy

FeO+nCO=Fe+(n-1)CO+CO2. How? Justify your answer why outgoing gases carry sufficient amount of CO from offtakes in b/f.

Mohamad Afzal KhanGold

Asked: June 13, 2020In: Mineral Processing & Non-ferrous Metallurgy

Distinguish between activity coefficient & activity quotient and its significance in calculating (CO/CO2)eq ratio inside blast furnace.

Mohamad Afzal KhanGold

Asked: June 3, 2020In: Mineral Processing & Non-ferrous Metallurgy

What is degree of metallisation? A sponge iron unit produces DRI of following composition-3.2%C, 1.5%Si, 1%Mn, .5%S, 0.8%P, rest is Fe. Calculate degree of metallisation?

Poll Results

57.14%Fe total is different from that of Fe-actual ( 12 voters )

42.86%Fe is consumed by impurities as Fe3C, Fe-Mn, Fe3P, FeS etc ( 9 voters )

Based On 21 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 31, 2020In: Physical Metallurgy & Heat treatment

What is the maximum solubility of carbon in iron? Justify your answer wrt Fe-Fe3C equilibrium diagram.

Poll Results

30%Relation among steel, cast iron & pig iron ( 3 voters )

70%Limitation of Fe-Fe3C diagram ( 7 voters )

Based On 10 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 31, 2020In: Physical Metallurgy & Heat treatment

What is the maximum solubility of carbon in iron? Justify your answer wrt Fe-Fe3C equilibrium diagram.

Poll Results

50%Relation among steel, cast iron & pig iron ( 3 voters )

50%Limitation of Fe-Fe3C diagram ( 3 voters )

Based On 6 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 29, 2020

Why it is not possible to draw a 2D Pentagon, but we can accommodate in fullerine, How?

Poll Results

42.86%Try by drawing Pentagon, see where do you struck. ( 3 voters )

57.14%Answer is related to football shape! ( 4 voters )

Based On 7 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 29, 2020In: Thermodynamics & Rate Processes

What is the difference between deltaG & deltaG°

Poll Results

9.09%Free energy criterion for equilibrium ( 1 voter )

90.91%Related to standard free energy change ( 10 voters )

Based On 11 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 28, 2020In: Corrosion

What is weld decay? Where do we find its common features?

Poll Results

89.66%It is related stainless steel ( 26 voters )

10.34%Street hawkers sell low standard products ( 3 voters )

Based On 29 Votes

Participate in Poll, Choose Your Answer.

Mohamad Afzal KhanGold

Asked: May 20, 2020In: Thermodynamics & Rate Processes

Ti-Al, Zr-Al show miscibility gap, but commercially they available as smart materials, How they are synthesized?