Building Materials MCQs

Question 1

Upto a maximum of 72% of iron, is available in

Accepted Answer

Magnetite

Answer

Red haemetite

Answer

Limonite

Answer

Siderite

Question 2

Minimum of 40% of iron, is available in

Accepted Answer

Black band.

Answer

Magnetite

Answer

Red haemetite

Answer

Limonite

Question 3

Cast iron

Accepted Answer

all the above.

Answer

is obtained by purifying pig iron

Answer

is manufactured in required shapes

Answer

may contain 2 to 5 per cent of carbon with other impurities

Question 4

Wrought iron contains carbon upto

Accepted Answer

0.15%

Answer

1.03i

Answer

1.50%

Answer

2%.

Question 5

Bessemer process is used for the manufacture of

Accepted Answer

Answer

Pig iron

Answer

cast iron

Answer

Wrought iron

Question 6

The steel which contains fissures and cavities, manufactured by

Accepted Answer

Cementation process

Answer

Crucible process

Answer

Bessemer process

Answer

Open hearth process.

Question 7

Pick up the correct statement from the following :

Accepted Answer

all the above.

Answer

In basic Bessemer process, the steel heats the converter

Answer

In open-hearth process, the furnace heats the steel

Answer

In siemens process, the impurities of pig iron are oxidised by the oxygen of the ore

Question 8

Blister steel

Accepted Answer

all the above.

Answer

is obtained by cementation process

Answer

is full of fissures and cavities

Answer

can not be forged

Question 9

The steel used in R.C.C. work is

Accepted Answer

mild steel

Answer

stainless steel

Answer

high carbon steel

Answer

wrought iron.