Correct answer
B. d2T/dZ2 > 0
Explanation
The correct answer is d2T/dZ2 > 0.
The minimum carbon content in steel should be ________ percent for it to respond to a hardening treatment?
A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is________?
Steady fluid flow occurs, when the derivative of flow variables satisfy the following condition.
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of „E/R’ is ________?
Advantages of use of preheated combustion air are________?
High degree of toughness is a must for________?