So as usually first question: introduce urself. Then he came to automobile engineering. -4 Stroke engine stages. -Clearance ratio and compression ratio. -What is the value of compression ratio for diesel and petrol. -Law behind - why plane floating in air (fluid ). Explain it. -About ABS: anti lock brake systems. -Different flame color from exhaust what they indicate. (white, black, grey, blue) -What happened when diesel in petrol engine? -Difference BS4 and BS6.