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Free download in PDF Engineering Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Ethanol is used as,
[A]
Polymeric thickener
[B]
Polymer
[C]
Polymeric thinner
[D]
None of above
Answer: Polymeric thickener
(2)
Calcium soap base grease is also called as,
[A]
Soap grease
[B]
Greases
[C]
Axle grease
[D]
Cup grease
(3)
Antiwear additive in extreme pressure additive is,
[A]
Soapstone
[B]
Tricresyl phosphate
[C]
Mica
[D]
Graphite
Answer: Tricresyl phosphate
(4)
Graphite is ....lubricant.
[A]
Solid
[B]
Liquid
[C]
Semi solid
[D]
None of above
(5)
Identify the odd type of lubricant from following,
[A]
Semi solid
[B]
Liquid
[C]
Gaseous
[D]
Solid
(6)
Identify liquid lubricant from the following,
[A]
Graphite
[B]
Lubricating oil
[C]
Mo Disulphide
[D]
Soapstone
(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
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
(9)
Standard electrode potential of Fe2+/Fe is,
[A]
+ 0.44 V
[B]
- 0.44 V
[C]
+ 1.44 V
[D]
- 1.44 V
(10)
Which of the following gases accelerates rusting of iron?
[A]
CO2
[B]
SO2
[C]
NO2
[D]
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
(12)
Standard electrode potential of Al / Al3+ is,
[A]
+ 0.66V
[B]
- 0.66 V
[C]
- 1.66 V
[D]
+ 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
(14)
Process of corrosion enhanced by,
[A]
AIR & Moisture
[B]
Electrolytes in water
[C]
Metallic impurities
[D]
All of above
(15)
Smaller the grain size, corrosion is,
[A]
Greater
[B]
Lower
[C]
Constant
[D]
Doesn’t affected
(16)
Which of following metals could provide cathodic protection to Fe?
[A]
Al & Cu
[B]
Al & Zn
[C]
Zn & Cu
[D]
Al & Ni
(17)
Chemical formula of Rust is,
[A]
Fe2O3
[B]
FeO
[C]
Fe3O4
[D]
Fe2O3.XH2O
(18)
Electrochemical corrosion takes place on,
[A]
Anodic area
[B]
Near cathode
[C]
Cathodic area
[D]
Near anode
(19)
Lower is PH, corrosion is,
[A]
Greater
[B]
Constant
[C]
Lower
[D]
None of above
(20)
Volatile oxidation corrosion product of a metal is,
[A]
Fe2O3
[B]
MoO3
[C]
Fe3O4
[D]
FeO
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