Hardening of steel is not possible unless it is heated ______________ critical point?

Related Mcqs:

Spark plugs are made of______________________?

A. High alumina ceramic B. Metallic carbides C. Corundum D. Carborundum...

Wrought iron is a suitable material of construction for handling _____________ solutions?

A. Dilute acidic B. Concentrated acidic C. Alkalis & alkaline D. None of these...

Beehive coke ovens are made of ________________ bricks?

A. Silica B. Fireclay C. Silicon carbide D. Corundum...

Visco-elastic behaviour of materials which is time dependent is common in______________?

A. Plastics B. Crystalline solid C. Non-crystalline solids D. Non-crystalline organic polymer...

Thermoplastic resins are those polymers, which____________________?

A. Has decreased plasticity at increasing temperature B. Cannot be moulded C. Easily deform under pressure at high temperature D. None of these...