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A good lubricant must have...

A good lubricant must have

A

highly viscous only

B

volatile in nature only

C

low viscous

D

higly viscous and low volatile

Text Solution

Verified by Experts

The correct Answer is:
D
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TARGET PUBLICATION-FRICTION IS SOLIDS AND LIQUIDS -MCQ (CRITICAL THINKING)
  1. The tangential force of viscous drag on any layer of the liquid is dir...

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  2. The relative velocity of two parallel layers of water is 8 cm/sec. If ...

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  3. A good lubricant must have

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  4. Machine parts are jammed in winter. Why?

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  5. A sphere is dropped gently into a medium of infinite extent. As the sp...

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  6. Rain drops fall from a great height under gravity. Check the correct s...

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  7. A solid sphere falls with a terminal velocity V in CO(2) gas. If its i...

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  8. The maximum average velocity of water in a tube of diameter 2 cm so th...

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  9. Bernoulli's equation is ideally valid for

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  10. The pans of a physical balance are in equilibrium. Air is blown under ...

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  11. Assertion : Aeroplanes are made to run on the runway before take off...

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  12. Why two boats moving in parallel directions close to each other get at...

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  13. Water flowing through a horizontal pipe line having a constriction. Th...

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  14. A vessel is filled with water and kerosence oil. The vessel has a smal...

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  15. The reading of pressure meter attached with a closed pipe is 3.5 xx 10...

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  16. In a venturimeter, "" remains unchanged along the axis.

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  17. The speed of the efflux from an open tank is identical to that of ""

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  18. The velocity of efflux of an ideal liquid does not depend on

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  19. An L-shaped tube with a small orifice is held in a water stream as sho...

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  20. A cylindrical tank has a hole of 1cm^(2) in its bottom. If the water i...

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