Correct answer
B. hardness
Explanation
The correct answer is hardness.
The hottest point in a gas turbine is________?
Atomic number of an element in the periodic table represents the numbers of________?
Hardness of martensite is about________?
The center of pressure of a surface subjected to fluid pressure is the point________?
The cooling water requirement for diesel engine is of the order of________?
Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________?