ISRO SC/ENG 2006

 1) In nodular iron, graphite is in the form of

A. Cementite
B. Free carbon
C. Flakes
D. Spheroids

 2) Hardness of steel depends on

A. Amount of carbon it contains
B. The shape and distribution of the carbides in iron
C. Method of fabrication
D. Contents of alloying elements

 3) Too high welding current in arc welding would result in

A. Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
B. Excessive pilling up of weld metal, poor penetration, wasted electrodes
C. Too small bead, weak weld and wasted electrodes
D. Excessive pilling up of weld metal, overlapping without penetration of edges, wasted electrodes

 4) Which of the following processes would produce strongest components?

A. Hot rolling
B. Extrusion
C. Cold rolling
D. Forging

 5) Which of the following has maximum hardness

A. Austenite
B. Pearlite
C. Troostite
D. Martensite