Lubricants Interview Questions - 3 | Snaprecruit.com

Lubricants Interview Questions - 3 | Snaprecruit.com

Lubricants interview questions part 3

Lubricants interview questions part 3

Take as many assements as you can to improve your validate your skill rating

Total Questions: 20

1. The lubricating oils must be refined to remove ___________

Correct Answer is : Wax

2. Easily oxidised impurities cause ___________

Correct Answer is : Sludge formation

3. To improve the refined petroleum oils ______ are added.

Correct Answer is : Additives

4. A dispersion system consisting of two immiscible liquids is called ________

Correct Answer is : Emulsions

5. In oil in water emulsions, how much water is present _______

Correct Answer is : 3-20%

6. The emulsifiers in water in oil type emulsions are ________

Correct Answer is : Alkaline earth soaps

7. The lowest temperature at which the oils gives enough vapour.

Correct Answer is : Flash point

8. The fire point is the lowest temperature at which the vapour of oil burns continuously for at least ________ when a small flame is brought near to it.

Correct Answer is : 5 Seconds

9. The fire point of an oil is about ________ higher than the flash point.

Correct Answer is : 5-40oC

10. The lubricating oil is volatilises then the formed vapour _____

Correct Answer is : Non- inflammable

11. Pensky -Marten’s apparatus is used to find out the ________

Correct Answer is : Flash point

12. Oil cup in Pensky-marten’s apparatus is made with __________

Correct Answer is : Brass

13. The location of the cup in air bath can be known using __________

Correct Answer is : Flange

14. Flame exposure device is connected with _______

Correct Answer is : Shutter

15. Transformer oils must have _________

Correct Answer is : Good dielectric strength

16. For refrigerator system, the oils with the low viscosity, high cloud point and low pour point are used.

Correct Answer is : FALSE

17. The maximum pour-point requirements for refrigerator system are about ________ for lightest grade.

Correct Answer is : -40oF

18. For heavy cutting, the effective lubricants are _________

Correct Answer is : cutting oils

19. The reduction in friction is only when _____ of the oil film is ______ than that of the metal.

Correct Answer is : shear strength, less

20. The friction is needed to be reduced because _____

Correct Answer is : it will be reducing the excess heat generation

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