MATERIALS AND CONSTRUCTION QUIZ

Spark plugs are made of

High alumina ceramic

Corundum

Carborundum

Metallic carbides

TRUE ANSWER : ?
YOUR ANSWER : ?

Glass is corroded by

None of these

Phosphoric acid

Sulphuric acid

Fluorine (dry or wet)

TRUE ANSWER : ?
YOUR ANSWER : ?

Fatigue failure of a material results from __________ stress.

Compressive

None of these

Tensile

Fluctuating

TRUE ANSWER : ?
YOUR ANSWER : ?

Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its

Its ability to be cast, rolled, forged & stamped

High strength and corrosion & oxidation-resistance at elevated temperature

High strength to weight ratio

Low temperature strength properties

TRUE ANSWER : ?
YOUR ANSWER : ?

Cast iron compared to steel is better in

Fluidity & castability

Strength

Ductility

Malleability

TRUE ANSWER : ?
YOUR ANSWER : ?

High speed steel tools retain their hardness upto a temperature of __________ °C.

1100

500

900

750

TRUE ANSWER : ?
YOUR ANSWER : ?

For storing water and acid free benzol, use a __________ vessel.

None of these

Karbate

Steel

Stainless steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Tin coating on metals is not done by

Electro-deposition

Powder metallurgy

Spraying

Hot dipping

TRUE ANSWER : ?
YOUR ANSWER : ?

Invar contains the highest percentage of

Vanadium

Cobalt

Tungsten

Iron

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of manganese in alloy steel improves its

Cutting ability

Abrasion resistance & toughness

Elasticity & creep resistance

Corrosion resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

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