Engineering Chemistry Multiple Choice Questions and Answers

Questions

1 Ethanol is used as,

A Polymeric thickener

B Polymer

C Polymeric thinner

D None of above

View Answer

Answer: Polymeric thickener

2 Calcium soap base grease is also called as,

A Soap grease

B Greases

C Axle grease

D Cup grease

View Answer

Answer: Cup grease

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3 Antiwear additive in extreme pressure additive is,

A Soapstone

B Tricresyl phosphate

C Mica

D Graphite

View Answer

Answer: Tricresyl phosphate

4 Graphite is ....lubricant.

A Solid

B Liquid

C Semi solid

D None of above

View Answer

Answer: Solid

5 Identify the odd type of lubricant from following,

A Semi solid

B Liquid

C Gaseous

D Solid

View Answer

Answer: Gaseous

6 Identify liquid lubricant from the following,

A Graphite

B Lubricating oil

C Mo Disulphide

D Soapstone

View Answer

Answer: Lubricating oil

7 Viscosity index can be defined as,

A (L-U / L-H) X 100

B (L+U / L-H) X 100

C (L-H / L-U) X 100

D (L-H / L+U) X 100

View Answer

Answer: (L-U / L-H) X 100

8 Which of the following metal does not resists the corrosion process?

A Ni

B Cu

C Pb

D Fe

View Answer

Answer: Fe

9 Standard electrode potential of Fe2+/Fe is,

A + 0.44 V

B - 0.44 V

C + 1.44 V

D - 1.44 V

View Answer

Answer: - 0.44 V

10 Which of the following gases accelerates rusting of iron?

A CO2

B SO2

C NO2

D All of above

View Answer

Answer: All of above

11 Standard electrode potential of Zn2+/ Zn is,

A - 0.76 V

B + 0.76 V

C - 2.76 V

D + 2.76 V

View Answer

Answer: - 0.76 V

12 Standard electrode potential of Al / Al3+ is,

A + 0.66V

B - 0.66 V

C - 1.66 V

D + 1.66 V

View Answer

Answer: - 1.66 V

13 Standard electrode potential of hydrogen is,

A 1.00 V

B 0.00 V

C 0.01 V

D None of above

View Answer

Answer: 0.00 V

14 Process of corrosion enhanced by,

A AIR & Moisture

B Electrolytes in water

C Metallic impurities

D All of above

View Answer

Answer: All of above

15 Smaller the grain size, corrosion is,

A Greater

B Lower

C Constant

D Doesn’t affected

View Answer

Answer: Greater

16 Which of following metals could provide cathodic protection to Fe?

A Al & Cu

B Al & Zn

C Zn & Cu

D Al & Ni

View Answer

Answer: Al & Zn

17 Chemical formula of Rust is,

A Fe2O3

B FeO

C Fe3O4

D Fe2O3.XH2O

View Answer

Answer: Fe2O3.XH2O

18 Electrochemical corrosion takes place on,

A Anodic area

B Near cathode

C Cathodic area

D Near anode

View Answer

Answer: Anodic area

19 Lower is PH, corrosion is,

A Greater

B Constant

C Lower

D None of above

View Answer

Answer: Greater

20 Volatile oxidation corrosion product of a metal is,

A Fe2O3

B MoO3

C Fe3O4

D FeO

View Answer

Answer: MoO3

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