Building Materials MCQs

Question 1

Pick up the correct characteristic of Pyroxene from the following:

Accepted Answer

Answer

It forms octagonal crystals

Answer

It converts to chlorine by hydration

Answer

Its density is 2.3 to 3.6 g/cm2

Answer

Its hardness is 5 to 6

Question 2

Pick up the correct statement regarding low heat cement from the following:

Accepted Answer

All the above

Answer

It possesses less compressive strength

Answer

Its initial setting time is about one hour

Answer

Its final setting time is about 10 hours

Question 3

Pick up the correct statement from the following:

Accepted Answer

Lime is available by calcining calcium carbonate at 900°C

Answer

Lime is available in Free State

Answer

Lime is available by dissolving calcium carbonate in water

Answer

Lime is nothing but calcium chloride

Question 4

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

Melamine is obtained from calcium carbide

Answer

Formaldehyde is prepared synthetically from methane

Answer

The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin

Question 5

Pick up the incorrect statement from the following:

Accepted Answer

Plastics are ductile

Answer

Plastics are chemical resistant

Answer

Plastics are durable

Answer

Plastics are excellent electric insulators

Question 6

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

Plastics have generally low melting point

Answer

The coefficient of thermal expansion of plastics is about three times than that of steel

Answer

The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67

Question 7

Pick up the polymineralic rock from the following:

Accepted Answer

Granite

Answer

Quartz sand

Answer

Pure gypsum

Answer

Magnesite

Question 8

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

Quick lime is obtained by burning pure lime stone

Answer

Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%

Answer

Poor lime is obtained by burning lime stone containing impurities more than 5%

Question 9

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

Roasting is not necessary if iron ore is an oxide

Answer

Impurities float on the molten iron as slag

Answer

The slag contains lime about 45%