DAE CH 213 Chapter 12 MCQs

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DAE | CH-213

APPLIED CHEMISTRY

CHAPTER : 12

DIPLOMA OF ASSOCIATE ENGINEERING

EXAM PRAPARATION

COMMON WITH:

APPLIED CHEMISTRY

MULTIPLE CHOICE QUESTION

Chapter:12 (Corrosion)

Question 1:

In corrosion the chemical reaction is

reduction oxidation decomposition displacement

Question 2:

Which one of the following causes corrosion of Iron

Oxygen Hydrogen Moisture and Oxygen Strong base

Question 3:

The colour of corrosion product of silver is

Silver white Black Green Grey

Question 4:

The colour of corrosion product of copper is

Silver white Black Green Grey

Question 5:

Which one of the following metal does not corrode

zinc platinum sodium magnesium

Question 6:

The chemical composition of rust is

\(FeO.{H_2}O\) \(Fe{(OH)_3}\) \({Fe_2}{O_3}.x{H_2}O\) \(Fe{(OH)_2}\)

Question 7:

Machining, forming, welding, or heat treatment of metal can cause

stress corrosion uniform corrosion pitting corrosion dry corrosion

Question 8:

A common corrosion which deteriorates the whole surface of the metal and makes the surface thin is

stress corrosion uniform corrosion pitting corrosion dry corrosion

Question 9:

The corrosion due to the movement of corrosive liquids is

stress corrosion erosion corrosion pitting corrosion soil corrosion

Question 10:

The corrosion of underground pipes, cables etc. is called

stress corrosion erosion corrosion pitting corrosion soil corrosion

Question 11:

The corrosion of iron is called

rust erosion corrosion galvanic corrosion soil corrosion

Question 12:

The corrosion makes holes which are large in depth is called

pitting corrosion erosion corrosion crevice corrosion soil corrosion

Question 13:

Corrosion on the surface of a metal due to direct reaction of atmospheric gases is

stress corrosion dry or chemical corrosion crevice corrosion soil corrosion

Question 14:

The organisms causing the greatest corrosion problems are

viruses and bacteria algae and fungi bacteria and fungi viruses and fungi

Question 15:

A process in which metal is protected from corrosion by dipping it in molten zinc is called

tinning cladding galvanization electroplating

Question 16:

A process in which metal is protected from corrosion by cementing zinc powder is called

calorizing sheradizing galvanization chromizing

Question 17:

A process in which the coat metal is deposited on the base metal by passing a direct current is called:

tinning cladding galvanization electroplating

Question 18:

A Cementation with 55% Chromium powder & 45% Alumina for protection from corrosion is called

calorizing sheradizing galvanization chromizing

Question 19:

A Cementaion with Aluminium and Alumina powder for protection from corrosion is called

calorizing sheradizing galvanization chromizing

Question 20:

The bonding together of dissimilar metals by pressure is called

calorizing cladding galvanization chromizing

Quiz Results

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Incorrect Answers:

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NOTE

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INSTRUCTOR

MUHAMMAD BIN JAMEEL

BSC ENGG. CIVIL