Engineering Chemistry Quiz | Engineering Chemistry Objective Type Questions and Answers

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Questions
21 To decrease pour point of petroleum oil which is used from following?
A Ether
B Acetone
C Decane
D Phenol

Answer: Phenol
22 To increase viscosity index of petroleum oil which one of the following is used?
A Hexanol
B Methanol
C Ethanol
D 2-methoxy phenol

Answer: Hexanol
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23 To increase oiliness of petroleum oil following which acid is not used,
A Palmitic acid
B Stearic acid
C Acetic acid
D Oleic acid

Answer: Acetic acid
24 Blended oils can be prepared by mixing petroleum oil with,
A Waxy substance
B Different solvents
C Specific additives
D None of above

Answer: Specific additives
25 Solvent refining step in purification of petroleum oil comprises use of solvent,
A Furfural
B Dichloroethyl ether
C Nitrobenzene
D All of above

Answer: All of above
26 In acid refining step which used to purify petroleum oil, comprises removal of excess Conc. H2SO4 with addition of calculated quantity of,
A KOH
B NH4OH
C Ca(OH)2
D NaOH

Answer: NaOH
27 Purification of petroleum oil contains following sequence as,
A Dewaxing, solvent refining, acid refining
B Dewaxing, acid refining, solvent refining
C Acid refining, dewaxing, solvent refining
D Solvent refining, acid refining, dewaxing.

Answer: Dewaxing, acid refining, solvent refining
28 Shorter the chain of petroleum oil,
A Lower viscosity
B Higher viscosity
C Softer
D None of above.

Answer: Lower viscosity
29 Length of hydrocarbon chain in petroleum oils varies between about,
A 0 to 12 Carbon atoms
B 0 to 50 Carbon atoms
C 21 to 30 Carbon atoms
D 12 to 50 Carbon atoms

Answer: 12 to 50 Carbon atoms
30 Animal and vegetable oils are also used as,
A Oiliness carrier
B Blending agent
C Solvent agent
D Extreme pressure additives

Answer: Blending agent
31 Animal and vegetable oils possess,
A Good oiliness
B Poor oiliness
C Optimum oiliness
D None of above

Answer: Good oiliness
32 Important extreme pressure additives contains functional group from following,
A Chlorides
B Sulphides
C Phosphides
D All of above

Answer: All of above
33 Special additives added to mineral oils are known as,
A Extreme pressure additives
B Special additives
C Mineral additives
D Lubricating additives

Answer: Extreme pressure additives
34 Coefficient of friction for boundary lubrication is,
A 0.5 to 15
B 0.005 to 0.05
C 0.5 to 0.15
D 0.05 to 0.15

Answer: 0.05 to 0.15
35 Coefficient of friction in fluid film or hydrodynamic lubrication is,
A 0. 1 to 0.3
B 0.01 to 0.03
C 0.001 to 0.03
D None of above

Answer: 0.001 to 0.03
36 What type of lubrication is used in delicate machines like watches, sewing machines, etc?
A Fluid film lubrication
B Extreme lubrication
C Boundary lubrication
D Thin film lubrication

Answer: Fluid film lubrication
37 What type of oil is suitable for thick film lubrication?
A Hydrocarbon oil
B Mineral oil
C Polymeric oil
D None of above

Answer: Hydrocarbon oil
38 Antioxidants may be,
A Aromatic
B Phenolic
C Amino compounds
D All of above

Answer: All of above
39 Main function of soap is,
A Thickening agent
B Soapy agent
C Lathering agent
D Corrosion preventer

Answer: Thickening agent
40 More active metal used in sacrificial anodic protection method is known as,
A Sacrificial anode
B Sacrificial cathode
C Active anode
D Active cathode

Answer: Sacrificial anode

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