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Bonding Theory MCQ Questions - Casting

Bonding Theory MCQs : Here you will find MCQ Questions related to "Bonding Theory" in Casting, Forming & Welding. These Bonding Theory MCQ Questions Will help you to improve your Casting, Forming & Welding knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.




Question 1

Which of the following is not one of the bonding theories?

A. Electrostatic bonding theory
B. Hot strength theory
C. Surface tension theory
D. Block and wedge theory

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Question 2

In electrostatic bonding theory, water is mixed in?

A. clay
B. sand grains
C. Both A and B
D. Iron oxides

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Question 3

The OH– ions are basically the?

A. base ions
B. compound ions
C. simple ions
D. complex ions

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Question 4

For the bonding action of the clays, water is needed, which activates the sand and clay-sand mixture. The amount needed for this is ?

A. 3.5%-11%
B. 4.5%-12%
C. 5.5%-13%
D. 1.5% to 8%.

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Question 5

What is the amount of sea coal needed in cast irons for small casting moulding sands?

A. 0.01
B. 0.02
C. 0.03
D. 0.04

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Question 6

Sea coal is used for?

A. electrostatic bonding
B. valence bond
C. surface appearance improvement
D. None of the above

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Question 7

What is the amount of sea coal needed in cast irons for large green casting moulding sands?

A. 5
B. 10
C. 15
D. 20

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Question 8

Cereals improve flowability and lower collapsibility.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 9

Which of the following are used for increasing the dry strength of the sand, which add hardness to the mould?

A. Dextrin 
B. molasses
C. Iron oxides
D. Both A and B

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Question 10

Pitch distillation of soft coals plays a vital role in bonding theory. Pitch is used for getting a good surface finish on iron casts. These pitches generally are used up to be to 2%.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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