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A good lubricant must have...

A good lubricant must have

A

high viscosity

B

low viscosity

C

high density

D

low surface tension

Text Solution

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The correct Answer is:
A
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NARAYNA-MECHANICAL PROPERTIES OF FLUIDS-C.U.Q
  1. When stirring of a liquid is stopped, the liquid comes to rest due to

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  2. Viscosity is exhibited by

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  3. A good lubricant must have

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  4. With the increase of temperature

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  5. Coefficient of viscosity of a gas

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  6. Viscosity of water at constant temperature is

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  7. Hot syrup flows faster because

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  8. The pressure at a depth h in a liquid of density rho is plotted on the...

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  9. A drop of water of radius r is falling rhough the air of coefficient o...

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  10. The paint-gun works on the principle of

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  11. The rate of flow of a liquid through a capillary tube is

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  12. Poiseuille's equation holds good when

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  13. If l is length of the tube and r is the radius of the tube, then the r...

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  14. Which factor better controls the flow rate of a liquid throught the sy...

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  15. After terminal velocity is reached the acceleration of a body falling ...

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  16. A spherical bal is dropped in a long column of a viscous liquid. The s...

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  17. A solid rubber ball orf density d and radius R falls vertically throug...

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  18. A small steel ball of radius r is allowed to fall under gravity throug...

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  19. A ball is dropped into coaltar. Its velocity time curve will be

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  20. Two needles are floating on the surface of water. A hot needle when to...

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