31] Scribers are made of...

 31] Scribers are made of...

A] Mild steel 

B] High carbon steel 

C] Brass 

D] Cast iron

30] The part of the universal surface gauge which helps to draw a parallel line along a datum edge is the..

 30] The part of the universal surface gauge which helps to draw a parallel line along a datum edge is the..

A] Rocker arm 

B] Snug 

C] Fine adjustment screw 

D] Guide pins