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Additives interview questions
Additives interview questions
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Total Questions: 15
1. The most common reason for the degradation of the petroleum oil is their ______
A. Volatility
B. Oxidation
C. Reduction
D. Temperature coefficient
Show Correct Answer
Correct Answer is :
Oxidation
2. The oxidation inhibitors terminate the hydro peroxide chain by combining with ______
A. Hydrogen peroxide
B. Oxides of metals
C. Hydro carbons
D. Ozone
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Correct Answer is :
Hydrogen peroxide
3. ___________ are surface active additives.
A. Oxide inhibitors
B. Rust inhibitors
C. Dispersants
D. Friction modifiers
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Correct Answer is :
Rust inhibitors
4. Tiadiazole and triazole derivatives are used for ______
A. Aluminium alloy corrosion
B. Silver corrosion
C. Copper corrosion
D. Manganese corrosion
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Correct Answer is :
Copper corrosion
5. To reduce the wear and tear of the gears _______ are used
A. Anti wear agents
B. Rust inhibitors
C. Oxide inhibitors
D. Dispersants
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Correct Answer is :
Anti wear agents
6. In steel and steel lubrication, the zinc dialkyl dithiosulphates forms _______
A. ZnSO4
B. ZnSO2
C. ZnSO3
D. ZnS
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Correct Answer is :
ZnS
7. In automotive applications _______ are used.
A. Friction modifiers
B. Dispersants
C. Anti wear agents
D. Oxide inhibitors
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Correct Answer is :
Friction modifiers
8. Friction modifiers have 12-18 carbons.
A. FALSE
B. TRUE
C.
D.
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Correct Answer is :
TRUE
9. The oil insoluble sludge can be reduced by using _______
A. Pour point depressants
B. Friction modifiers
C. Oxide inhibitors
D. detergents
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Correct Answer is :
detergents
10. The commonly used dispersant is ________
A. Carboxylic acid
B. Alkyl phosphoric acid
C. Poly butyl succinic acid
D. Sodium salts of alkyl benzene sulfonic acid
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Correct Answer is :
Poly butyl succinic acid
11. On cooling below the pour point, the wax will be _______
A. Evaporated
B. Condensed
C. Crystallized
D. Sublimated
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Correct Answer is :
Crystallized
12. The viscosity index can be improved by adding ______
A. Linear polymers
B. Branched polymers
C. Cyclic polymers
D. Inorganic materials
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Correct Answer is :
Linear polymers
13. Gear oils on adding viscosity index improves can be used in ______
A. Motor vehicles
B. Machinery
C. Air crafts
D. Engines
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Correct Answer is :
Air crafts
14. Foaming of oils can be prevented by using ______
A. Despersants
B. Foam inhibitors
C. Rust inhibitors
D. Oxide inhibitors
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Correct Answer is :
Foam inhibitors
15. vegetable oils are added to the lubricants to improve their ______
A. Lubrication
B. Oiliness
C. Viscosity
D. Efficiency
Show Correct Answer
Correct Answer is :
Oiliness
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