The machinability of aluminium increases when _________ is added to aluminium. Magnesium Lead and bismuth Silicon Copper TRUE ANSWER : ? YOUR ANSWER : ?
Hardness of upper bainite (acicular structure) is about RC 48 RC 57 RC 65 RC 80 TRUE ANSWER : ? YOUR ANSWER : ?
The property of a material essential for spring materials is Resilience Ductility Stiffness Plasticity TRUE ANSWER : ? YOUR ANSWER : ?
The stiffness is the ability of a material to resist None of these Externally applied forces with breakdown or yielding Deformation under stress Fracture due to high impact loads TRUE ANSWER : ? YOUR ANSWER : ?
The material widely used for making pendulums of clocks is Heat resisting steel Stainless steel High speed steel Nickel steel TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following material has maximum ductility? Copper Nickel Aluminium Mild steel TRUE ANSWER : ? YOUR ANSWER : ?
The ability of a material to absorb energy in the plastic range is called Creep Toughness Fatigue strength Resilience TRUE ANSWER : ? YOUR ANSWER : ?
Admiralty gun metal contains Alloy of tin, lead and cadmium Iron scrap and zinc 63 to 67% nickel and 30% copper 88% copper, 10% tin and rest zinc TRUE ANSWER : ? YOUR ANSWER : ?
The bond formed by transferring electrons from one atom to another is called None of these Covalent bond Metallic bond Ionic bond TRUE ANSWER : ? YOUR ANSWER : ?
For a steel containing 0.8% carbon There are two critical points There is only one critical point There is no critical point There can be any number of critical points TRUE ANSWER : ? YOUR ANSWER : ?