Engineering Materials - Study Mode

[#271] Structural steel contains following principal alloying elements
Correct Answer

(A) Nickel, chromium and manganese

Explanation

Solution: Structural steel contains Nickel, chromium and manganese

[#272] The most effective inhibitor of grain growth, when added in small quantities is
Correct Answer

(B) Vanadium

Explanation

Solution: Vanadium is traditionally known for its ability to retard grain growth at elevated temperatures and for its beneficial affinity for carbon and nitrogen. Vanadium promotes fine grain size, increases hardenability and improves wear resistance through the precipitation of its carbides and nitrides.

[#273] Monel metal is an alloy of
Correct Answer

(A) Nickel and copper

Explanation

Solution: Monel metal is an alloy of Nickel and copper

[#274] Delta metal is an alloy of
Correct Answer

(A) Copper, zinc and iron

Explanation

Solution: A brass alloy consisting of copper (55%), zinc (41 - 43%) and iron (1 - 3%), with the balance consisting of various other metals. The proportions used make the material harder and suitable for valves and bearings.

[#275] Materials after cold working are subjected to following process to relieve stresses
Correct Answer

(D) Annealing

Explanation

Solution: A heat treatment used to eliminate part or all of the effects of cold working. Cold working - Deformation of a metal below the recrystallization temperature. During cold working, the number of dislocations increases, causing the metal to be strengthened as its shape is changed.