Materials and Construction MCQs

Question 1

Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of

Accepted Answer

Rubber lined mild steel

Answer

Lead lined mild steel

Answer

Aluminium

Answer

Cast iron

Question 2

Pick out the wrong statement

Accepted Answer

Both B and C

Answer

Hardening makes the steel more brittle

Answer

High alloy steels contain more than 50% alloying element

Answer

18/8 stainless steel is a magnetic steel

Question 3

A material capable of undergoing large permanent deformation, when subjected to tension is termed as

Accepted Answer

Ductile

Answer

Friable

Answer

Brittle

Answer

None of these

Question 4

Which one occupies the lowermost position in the electromotive series of metals?

Accepted Answer

Noble metals (Ag, Pt, Au)

Answer

Aluminium

Answer

Zinc

Answer

Alkali metals (K, Na, Li)

Question 5

Carbon is present in the uncombined (graphitic) form in case of

Accepted Answer

Cast iron

Answer

Steel

Answer

Ferroalloy

Answer

None of these

Question 6

__________ moulding process can not be used for thermoplastic plastics.

Accepted Answer

Injection

Answer

Compression

Answer

Extrusion

Answer

None of these

Question 7

Carbon tetrachloride can be stored in a storage vessel made of

Accepted Answer

All of the above

Answer

High silicon iron (14% Si)

Answer

Tin

Answer

Stainless steel

Question 8

100% H 2 SO 4 at 30°C can't be stored in a vessel made/lined with

Accepted Answer

Aluminium, tin and rubber

Answer

Cast iron and high silicon iron

Answer

Mild steel and stainless steel

Answer

Teflon, glass and porcelain

Question 9

Mercury is transported in metal containers made of

Accepted Answer

Iron

Answer

Aluminium

Answer

Lead

Answer

Nickel