Material Science And Metallurgy (3131904) MCQs

MCQs of Corrosion of Metal And Alloys

Showing 1 to 7 out of 7 Questions
1.

What is meant by corrosion?

(a)

Chemical reaction between anode, cathode and electrolyte, which leads to loss of metal
(b)

Deterioration of metals due to reaction with its environment
(c)

Both a. and b.
(d)

None of the above
Answer:

Option (c)

2.

Which type of chemical reaction is observed at cathode, in electrochemical corrosion?

(a)

Oxidation reaction
(b)

Peretectic reaction
(c)

Reduction reaction
(d)

None of the above
Answer:

Option (c)

3.

Which of the following corrosions are caused due to velocity of fluid flow in pipes?

(a)

Bimetal corrosion
(b)

Cavitation corrosion
(c)

Galvanic corrosion
(d)

Intergranular corrosion
Answer:

Option (b)

4.

Corrosion fatigue is a combined effect of _____

(a)

Corrosive environment and mechanical stresses
(b)

Cyclic loading and corrosion
(c)

Velocity and mechanical stresses
(d)

None of the above
Answer:

Option (b)

5.

The erosion corrosion can be controlled by _______

(a)

increasing the flow velocity through pipes
(b)

increasing temperature of fluid
(c)

minimizing turbulence
(d)

all of the above
Answer:

Option (c)

6.

Which of the following methods is not used to coat metallic elements to prevent corrosion?

(a)

Electroplating
(b)

Metal cladding
(c)

Metal spraying
(d)

None of the above
Answer:

Option (d)

7.

Which of the following statements is/are true for erosion corrosion?

(a)

The dissolution rate of protective film increases due to turbulent flow
(b)

Erosion corrosion occurs due to high turbulent fluid flow
(c)

The corrosion rate can be reduced by reducing the velocity of fluid
(d)

 All of the above
Answer:

Option (d)

Showing 1 to 7 out of 7 Questions