Engineering Materials - Study Mode

[#141] Basic constituents of Monel metal are
Correct Answer

(A) Nickel, copper

Explanation

Solution: Monel is a group of nickel alloys, primarily composed of nickel and copper, with small amounts of iron, manganese, carbon, and silicon.

[#142] Steel with __________ carbon is known as hypo-eutectoid steel.
Correct Answer

(B) Below 0.8%

Explanation

Solution: Hypo-eutectoid steel has less than 0,8% of Carbon in its composition. It is composed by pearlite and α-ferrite

[#143] In spheroidising process, the steel is
Correct Answer

(C) Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

Explanation

Solution: Spheroidizing of high carbon steel is a method of prolonged heating at a temperature below the eutectoid temperature. By heating at this temperature pearlite, which is the lowest energy arrangement of steel, gets converted to ferrite and cementite. . However, the process of spheroidizing does consume a lot of energy.

[#144] Lead is poured into the joint between two pipes. These pipes may be made of
Correct Answer

(A) Cast iron

Explanation

Solution: Lead is poured into the joint between two pipes. These pipes may be made of Cast iron Cast iron has a much higher melting point than lead.

[#145] Constantan an alloy used in thermocouples is an alloy of
Correct Answer

(D) Copper and nickel

Explanation

Solution: a copper–nickel alloy used in electrical work for its high resistance. It usually consists of 55% copper and 45% nickel