Home / MCQ Bank / Metallurgical Engineering

Metallurgical Engineering Extractive Metallurgy Difficulty: Medium

Organic sulphur present in coal is found out by Gray cast iron is usually welded by Match the defects given in Group I with the suitable non-destructive evaluation technique from Group II . Group I Group II P. Crack in a flat aluminium slab 1. Radiography Q. Sub-surface porosity in a bronze casting 2. Eddy current technique R. Surface cracks in a steel tool 3. Ultrasonic technique S. Internal porosity in a ceramic block 4. Magnetic particle technique Determination of ash content of coal during its proximate analysis, the temperature of weighed coal sample is raised to 400 - 500°C in half an hour and maintained at the same level for further half an hour. The temperature is then raised to . . . . . . . . °C at which the sample is heated for one more hour before weighing it. As compared to the engineering stress-engineering strain curve, the true stress-true strain curve for a given material