ISRO Scientist or Engineer Mechanical 2006

Cementite

Free carbon

Flakes

Spheroids

Amount of carbon it contains

The shape and distribution of the carbides in iron

Method of fabrication

Contents of alloying elements

Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

Excessive piling up of weld metal, poor penetration, wasted electrodes

Too small bead, weak weld and wasted electrodes

Excessive piling up of weld metal, overlapping without penetration of edges, wasted electrodes

Hot rolling

Extrusion

Cold rolling

Forging

$$n_1 \left( \frac{\delta q_1}{q_1} \right) + n_2 \left( \frac{\delta q_2}{q_2} \right) + n_3 \left( \frac{\delta q_3}{q_3} \right) $$

$$\frac{1}{n_1} \frac {\delta q_1}{q_1} + \frac{1}{n_2} \frac {\delta q_2}{q_2} + \frac{1}{n_3} \frac {\delta q_3}{q_3} $$

$$ \frac {\delta q_1}{q_1} + \frac {\delta q_2}{q_2} + \frac {\delta q_3}{q_3} $$

$$\left( \frac {\delta q_1}{q_1} \right)^{n_1} + \left( \frac {\delta q_2}{q_2} \right)^{n_2} + \left( \frac {\delta q_3}{q_3} \right)^{n_3} $$

Austenite

Pearlite

Troostite

Martensite

Effective command and control

Defined responsibilities at all levels

Rigid discipline in the organization

All of the above

Operation research

Linear programming

Network analysis

Queuing theory

Controllable errors

Calibration errors

Avoidable errors

Random errors

$$\frac {P^2L^3}{3EI}$$

$$\frac {P^2L^3}{6EI}$$

$$\frac {P^2L^3}{4EI}$$

$$\frac {P^2L^3}{48EI}$$