NCM Unit 6 Test

NCM Unit 6 Test

University

20 Qs

quiz-placeholder

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NCM Unit 6 Test

NCM Unit 6 Test

Assessment

Quiz

Other

University

Medium

Created by

Digambar Kashid

Used 6+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Hot dipping is a process of developing coating by

Dipping the substrate into an aqueous electrolyte at room temperature

Dipping the substrate in molten metal bath having low melting/fusion temperature

Dipping the substrate in a solution which reacts with the substrate surface to form a compound

Dipping the substrate in a aqueous electrolyte and passing electric current

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Galvanizing is the term used to indicate:

Zn coating

Fe coating

Al coating

Sn coating

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Aluminium is usually added while hot dip galvanizing of zinc for the following purpose:

Al reduces the melting point of zinc bath

Al suppresses the formation of Fe-Zn intermetallics

Al increases the oxidation of Zn bath

Al increases the strength of the coating

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Thin film coating by physical vapor deposition (PVD) is amenable to:

Only elemental metals

Only pure metals or metallic alloys

Only pure metals, alloys and intermetallic compounds

Pure metals, alloys, semi-conductors, intermetallic + non-metallic compounds, composites

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Identify the method from below which is not a typical PVD technique:

Direct current (DC)

Electro-plating

Ion plating

RF sputtering

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

PVD is most useful for:

All the below

Tribological application

Aesthetic coating

Semiconductor device fabrication

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

PVD is not effective to improve:

Wear resistance

Corrosion resistance

Oxidation resistance

Coefficient of friction

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