Materials and Construction - Chemical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Pick out the wrong statement

Hardening makes the steel more brittle.

High alloy steels contain more than 50% alloying element.

18/8 stainless steel is a magnetic steel.

both (b) and (c)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Duriron is

acid resistant, brittle and very hard.

high silicon iron.

prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion.

all (a), (b) and (c).

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Pick out the correct statement.

Stainless steel is nothing but chromium coated steel.

Hardening of a soft metal can be done by alloying it with another metal or non-metal.

Plastic deformation of a material is its temporary distortion under the action of applied stress.

Rusting of iron is not electrochemical in nature.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Cast iron detachable joint is used in __________ pipes.

steel

cast iron

asbestos cement

reinforced cement concrete

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Tin coating on metals is not done by

spraying

powder metallurgy

hot dipping

electro-deposition

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The softest material just next to talc in the Mho's scale is

quartz

gypsum

feldspar

fluorite

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

18/8 stainless steel means, that it contains

18% chromium and 8% nickel.

18% chromium and 8% molybdenum.

18% nickel and 8% chromium.

18% molybdenum and 8% chromium.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Glass is corroded by

fluorine (dry or wet)

sulphuric acid

phosphoric acid

none of these

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Iron alloyed with carbon upto 2% is called

pig iron

wrought iron

high carbon steel

none of these