Engineering Chemistry Quiz | Engineering Chemistry Short Questions and Answers

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Questions
41 Relative humidity above which atmospheric corrosion rate of metal increases sharply is known as,
A Critical humidity
B Humidity rate
C Environmental humidity
D Atmospheric humidity

Answer: Critical humidity
42 Ratio of volumes of metal oxides to metal is known as,
A Specific mass ratio
B Volume ratio
C Specific ratio
D Specific volume ratio

Answer: Specific volume ratio
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43 Paints which are used to restrict corrosion are known as,
A Anticorrosion paints
B Antifouling paints
C Special paints
D Marine paints

Answer: Antifouling paints
44 In waterline corrosion highly oxygenated parts acts as,
A Cathodic
B Anodic
C Corroded
D None of these

Answer: Cathodic
45 In differential aeration corrosion, poor oxygenated parts are,
A Anodic
B Cathodic
C Corroded
D None of above

Answer: Anodic
46 Lubricating oil should possess acid value,
A More than 0.1
B 0.1
C Less than 0.1
D None of above

Answer: Less than 0.1
47 In pour point apparatus the freezing mixture used is,
A Ice + CaCl2
B Ice + BaCl2
C Ice + MgCl2
D Ice + AlCl3

Answer: Ice + CaCl2
48 Apparatus used to determine flash and fire points of lubricating oil is known as,
A Bomb calorimeter
B Spectrophotometer
C Redwood viscometer
D Pensky Martin Apparatus

Answer: Pensky Martin Apparatus
49 Redwood viscometer No. 1 is used to determine viscosities of,
A Lubricating Oils
B Thin lubricating oils
C Highly viscous oils
D None of above

Answer: Thin lubricating oils
50 High viscosity standard oil is,
A Blended oil
B Gulf oil
C Pennylsylvanian oil
D Petroleum oil

Answer: Pennylsylvanian oil
51 Low viscosity standard oil is,
A Petroleum oil
B Gulf oil
C Blended oil
D Mineral oil

Answer: Gulf oil
52 Mo disulphide possesses very low ......
A Coefficient of friction
B Lubricating property
C Frictional resistance
D Conductivity

Answer: Coefficient of friction
53 When graphite is dispersed in water, is called,
A Oil dug
B Aqua dug
C Graphia-water
D None of above

Answer: Aqua dug
54 To prevent corrosion phenomenon, combination of.....is used,
A Phosphorous or Antimony
B Phosphorous or Chlorine
C Phosphorous or Nitrogen
D Antimony or Sodium

Answer: Phosphorous or Antimony
55 Identify the metal which is not employed as Sacrificial anode,
A Mg
B Zn
C Al
D Na

Answer: Na
56 Identify the group which is not used as anodic inhibitor,
A Chromates
B Phosphates
C Sulphates
D Tungstates

Answer: Sulphates
57 Oxidation potential of Ni / Ni2+ is,
A + 0.284 V
B - 0.284 V
C + 2.284 V
D - 2.284 V

Answer: + 0.284 V
58 From the following, which is inert to oxidation?
A Cu
B Fe
C Steel
D Pt

Answer: Pt
59 Conversion of Fe to Fe2+ is,
A Oxidation
B Reduction
C Corrosion
D None of above

Answer: Oxidation
60 From the following, identify the gas which is not responsible for acid rain.
A SO2
B NO2
C HCl
D Ozone

Answer: Ozone

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