48) Delta iron occurs between the temperature range of

49) In a bag there are 6 red balls, 2 blue balls and 7 white balls. What is the probability of getting either a white or red ball?

50) The type of space lattice found in alpha-iron is

51) In an electrolytic process, the component to be plated is

52) The temperature at which structure of steel completely changes to austenite is called