Building Construction Materials.

Building Construction Materials -

10/02/2020. 

01. Fibre glass

A.retains heat-longer

B.has a higher strength to weight ratio

C.is shock proof and fire retardent

D.does not decay

E.all the above.

Answer - E

02. The commonly used colour pigment in         paints, is

A.ambers

B.carbon black

C.iron oxide

D.lamp black

E.all the above.

Answer - E

03. For melting one tonne of cast iron

A.700 m3 air is required

B.20 kg limestone is required

C.one quintal coke is required

D.all the above.

Answer - D

04. For filling cracks in masonry structures, the type of bitumen used, is

A.cut-back bitumen

B.bitumen-emulsion

C.blown bitumen

D. Plastic bitumen. 

Answer - D

05. Plastic

A.is an organic substance

B.consists of natural or synthetic binders

C.finished products are rigid and stable at normal temperature

D.is capable of flow when necessary heat and pressure are applied

E.All the above.

Answer - E

06. Vanadium steel is generally used for

A.railway switches and crossing

B.bearing balls

C.magnets

D.axles and springs.

Answer - D

07. Pick up the correct statement from the following:

A.In basic Bessemer process, the steel heats the converter

B.In open-hearth process, the furnace heats the steel

C.In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore

D.all the above.

Answer - D

08. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as

A. Cementation process

B.Crucible process

C.Bessemer process

D.Open hearth process.

Answer - B

09. Varnish is a transparent or semi-transparent solution of resinuous substances in

A.alcohol

B.linseed

C.turpentine

D.all the above.

Answer - D

10. Initial setting time of cement for asbestos cement products should be not less than

A.30 minutes

B.50 minutes

C.75 minutes

D.90 minutes.

Answer - D