Engineering Materials
Brass contains

85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70 - 75% copper and rest tin
70% copper and 30% zinc

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Combined carbon in iron makes the metal

Hard and gives a fine grained crystalline structure
Soft and gives coarse grained crystalline structure
Soft and gives a fine grained crystalline structure
Hard and gives a coarse grained crystalline structure

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Carbon steel is

Extensively used for making cutting tools
Made by adding carbon in steel
Refined from cast iron
An alloy of iron and carbon with varying quantities of phosphorus and sulphur

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Stress relaxation is the phenomenon

Stress reduces on increasing load
In which stress remains constant on increasing load
In which parts are not loaded
In which deformation tends to loosen the joint and produces a stress reduced

ANSWER DOWNLOAD EXAMIANS APP