Engineering :: Materials of Construction

@ : Home > Chemical Engineering > Materials of Construction

21.

Stainless steel in addition to iron and carbon contains

A.	sluminium	B.	zinc
C.	lead	D.	chromium

22.

Which one of the following statements is wrong?

A.	Alloys containing copper may be white	B.	A soft metal may be hardened by alloying it with another metal or non-metal
C.	Silver-plated copper articles contain an alloy of copper and silver	D.	Alloys containing carbon are grey or black

23.

Which of the following pairs of elements might form an alloy?

A.	Zinc and lead	B.	Iron and carbon
C.	Iron and mercury	D.	Mercury and platinum

24.

Brass is composed of

A.	Cu?Zn	B.	Cu?Sn
C.	Sn?Zn	D.	AI?B

25.

In bronze copper is alloyed with

A.	Zn	B.	Sn
C.	Be	D.	AI

26.

Iron sheets are galvanised to

A.	increase lustre	B.	prevent action of oxygen
C.	prevent action of water	D.	harden the surface

27.

Galvanised iron is

A.	easy to be painted	B.	of better look
C.	protected from rusting	D.	harder

28.

Type 304 stainless steel contains

A.	18% Cr 8% Ni 0.08%C (max)	B.	8% Cr 18% Ni 0.08%C (max)
C.	6% Cr 18% Ni 0.08%C (max)	D.	18% Cr 36% Ni 0.08%C (max)

29.

Which of the following has maximum melting point?

A.	Wrought iron	B.	White cast iron
C.	Steel	D.	Grey cast iron

30.

Compared to grey cast iron white cast iron is

A.	very hard	B.	very brittle
C.	more durable	D.	all of the above