List of top Engineering Sciences Questions asked in GATE Production and Industrial Engineering

Match the engineering materials at room temperature with the given crystal structures. 

A cylindrical casting has 10 cm diameter and a mass of 12.56 kg. The material density is \( 7.85 \times 10^{-3} \, \text{kg/cm}^3 \). The value of exponent \(n\) is 2 and solidification time is 12 min. The Chvorinov's constant, in min/cm\(^2\), is ................. (round off to 2 decimal places).
A metal rod of diameter 14 mm is subjected to a tensile test. After the test, its cross-sectional diameter at the fractured end is 12 mm. The ductility, in %, is ................. (round off to 2 decimal places).
A solid circular disk of 0.025 m thickness is used as a flywheel. The density of the disk material is 7800 kg/m³ and the mass moment of inertia of the disk about its center is 4.36 kg·m². The radius, in m, of the disk is ................. (round off to 2 decimal places).
Creep of mild steel at elevated temperature involves