Materials and Construction MCQs

Question 1

Copper is dissolved from its ore by H 2 SO 4 in a percolation tank made of

Accepted Answer

Reinforced concrete lined with lead

Answer

Wood

Answer

Stainless steel

Answer

High silicon iron (14% Si)

Question 2

Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.

Accepted Answer

0.2

Answer

0.02

Answer

0.35

Answer

0.5

Question 3

Alpha iron is stable __________ °C.

Accepted Answer

Upto 910

Answer

Above 1403

Answer

Above 1800

Answer

Between 910 & 1403

Question 4

__________ iron is produced, when molten pig iron is allowed to cool gradually.

Accepted Answer

Grey cast

Answer

White cast

Answer

Wrought

Answer

None of these

Question 5

Which of the following is not a nickel based alloy?

Accepted Answer

Babbit metal

Answer

Inconel

Answer

Hastelloys

Answer

Nimonics

Question 6

Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.

Accepted Answer

Bismuth

Answer

Oxygen

Answer

Arsenic

Answer

Antimony

Question 7

Maximum consumption of lead is in the manufacture of

Accepted Answer

Storage batteries

Answer

Solder alloys

Answer

Electric cable sheathing

Answer

Lead lined vessels

Question 8

Coke oven walls are lined with __________ bricks.

Accepted Answer

Silica

Answer

Tar-dolomite

Answer

Low thermal conductivity

Answer

Fire clay

Question 9

Babbit metal (used for making bearings) comprises of

Accepted Answer

Mainly tin (85%) and lead

Answer

Saw dust and iron dust mixture

Answer

Zinc and aluminium

Answer

Copper and aluminium