MATERIALS AND CONSTRUCTION QUIZ

Gas holder of a gobar (cowdung) gas plant is made of

Mild steel

Molybdenum stainless steel

Aluminium

Tin

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YOUR ANSWER : ?

Mild steel is

A low carbon steel (0.05 to 0.3% carbon)

Highly resistant to corrosion (as much as stainless steel)

Very poor in strength & ductility

A high carbon steel (0.5 to 1.5% carbon)

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Very high sulphur in pig iron makes

Its brittle and malleable

All of these

Its hard and machinable

Its casting unsound

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YOUR ANSWER : ?

Spark plugs are made of

High alumina ceramic

Metallic carbides

Carborundum

Corundum

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YOUR ANSWER : ?

__________ can replace tungsten in high speed steel,

Molybdenum

Vanadium

Cobalt

Chromium

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YOUR ANSWER : ?

The behaviour of visco-elastic material is time dependent. This behaviour is commo in __________ materials.

Crystalline

Rubberry

Non-crystalline organic polymeric

Non-crystalline solid

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YOUR ANSWER : ?

Polymorphism is not exhibited by

Carbon

Iron

Phosphorous

None of these

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Atmospheric corrosion of metals result from their

Fast oxidation

Slow oxidation

Fast hydration

Slow dehydration

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YOUR ANSWER : ?

In order to be called steel, an alloy should have iron percentage greater than

70

80

50

90

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YOUR ANSWER : ?

Water gas generator is made of

Carbon steel-brick lined

Stainless steel-lead lined

High carbon steel-procelain lined

Cast iron

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YOUR ANSWER : ?

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