{"id":17623,"date":"2025-11-08T08:49:11","date_gmt":"2025-11-08T08:49:11","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=17623"},"modified":"2025-11-08T09:37:58","modified_gmt":"2025-11-08T09:37:58","slug":"viscosity-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/11\/08\/viscosity-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Viscosity Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">1. The property of a liquid by virtue of which it opposes relative motion between its layers is called<\/mark><\/strong><br>A) Viscosity<br>B) Elasticity<br>C) Density<br>D) Pressure<br><strong>Answer:<\/strong> A) Viscosity<br><strong>Explanation:<\/strong> Viscosity measures internal friction between moving layers of fluid.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">2. The force of friction between adjacent layers of a liquid in motion is called<\/mark><\/strong><br>A) Viscous force<br>B) Cohesive force<br>C) Adhesive force<br>D) Surface tension<br><strong>Answer:<\/strong> A) Viscous force<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">3. Viscosity is a property of<\/mark><\/strong><br>A) Liquids and gases<br>B) Solids only<br>C) Gases only<br>D) Plasma only<br><strong>Answer:<\/strong> A) Liquids and gases<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">4. Viscosity is due to<\/mark><\/strong><br>A) Cohesive forces between molecules<br>B) Adhesive forces<br>C) Friction<br>D) Gravity<br><strong>Answer:<\/strong> A) Cohesive forces between molecules<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">5. The SI unit of viscosity is<\/mark><\/strong><br>A) Pascal second<br>B) Newton<br>C) Joule<br>D) Pascal<br><strong>Answer:<\/strong> A) Pascal second<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">6. The viscosity of a liquid depends on<\/mark><\/strong><br>A) Nature of liquid<br>B) Temperature<br>C) Pressure<br>D) All of these<br><strong>Answer:<\/strong> D) All of these<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">7. When temperature increases, the viscosity of liquids<\/mark><\/strong><br>A) Decreases<br>B) Increases<br>C) Remains constant<br>D) Becomes zero<br><strong>Answer:<\/strong> A) Decreases<br><strong>Explanation:<\/strong> Heat weakens cohesive forces in liquids, making them flow easily.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">8. When temperature increases, the viscosity of gases<\/mark><\/strong><br>A) Increases<br>B) Decreases<br>C) Remains same<br>D) Becomes zero<br><strong>Answer:<\/strong> A) Increases<br><strong>Explanation:<\/strong> Higher temperature increases molecular collisions in gases, increasing resistance to flow.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">9. The viscosity of honey is<\/mark><\/strong><br>A) Greater than water<br>B) Less than water<br>C) Equal to water<br>D) Same as oil<br><strong>Answer:<\/strong> A) Greater than water<br><strong>Explanation:<\/strong> Honey flows slowly due to higher internal friction.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">10. The viscosity of air is<\/mark><\/strong><br>A) Very small<br>B) Very large<br>C) Equal to oil<br>D) Same as water<br><strong>Answer:<\/strong> A) Very small<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">11. A liquid having more viscosity flows<\/mark><\/strong><br>A) Slowly<br>B) Fast<br>C) With same speed<br>D) Irregularly<br><strong>Answer:<\/strong> A) Slowly<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">12. The viscosity of a perfect fluid is<\/mark><\/strong><br>A) Zero<br>B) Infinite<br>C) High<br>D) Constant<br><strong>Answer:<\/strong> A) Zero<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">13. Viscosity is also called<\/mark><\/strong><br>A) Internal friction<br>B) External pressure<br>C) Surface tension<br>D) Kinetic energy<br><strong>Answer:<\/strong> A) Internal friction<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">14. The instrument used to measure viscosity is called<\/mark><\/strong><br>A) Viscometer<br>B) Barometer<br>C) Manometer<br>D) Thermometer<br><strong>Answer:<\/strong> A) Viscometer<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">15. The viscosity of water is maximum at<\/mark><\/strong><br>A) Low temperature<br>B) High temperature<br>C) Freezing point<br>D) Boiling point<br><strong>Answer:<\/strong> A) Low temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">16. The viscosity of liquids is mainly due to<\/mark><\/strong><br>A) Cohesive forces<br>B) Adhesive forces<br>C) Air pressure<br>D) Temperature<br><strong>Answer:<\/strong> A) Cohesive forces<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">17. The viscosity of gases is mainly due to<\/mark><\/strong><br>A) Molecular collisions<br>B) Cohesive forces<br>C) Density<br>D) Pressure<br><strong>Answer:<\/strong> A) Molecular collisions<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">18. The flow of liquid layers sliding over each other is called<\/mark><\/strong><br>A) Laminar flow<br>B) Turbulent flow<br>C) Irregular flow<br>D) Chaotic flow<br><strong>Answer:<\/strong> A) Laminar flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">19. When the motion of fluid particles is disorderly, it is called<\/mark><\/strong><br>A) Turbulent flow<br>B) Laminar flow<br>C) Streamline flow<br>D) Uniform flow<br><strong>Answer:<\/strong> A) Turbulent flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">20. The point beyond which laminar flow changes to turbulent flow is called<\/mark><\/strong><br>A) Critical velocity<br>B) Terminal velocity<br>C) Average speed<br>D) Streamline point<br><strong>Answer:<\/strong> A) Critical velocity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">21. The viscosity of glycerin is<\/mark><\/strong><br>A) Very high<br>B) Very low<br>C) Equal to water<br>D) Same as oil<br><strong>Answer:<\/strong> A) Very high<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">22. The viscosity of oils is generally<\/mark><\/strong><br>A) High<br>B) Low<br>C) Same as water<br>D) Zero<br><strong>Answer:<\/strong> A) High<\/p>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>23. The slow motion of a small sphere through a viscous medium is called<\/strong><br><\/mark>A) Stokes\u2019 motion<br>B) Free fall<br>C) Elastic motion<br>D) Inertial motion<br><strong>Answer:<\/strong> A) Stokes\u2019 motion<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">24. The velocity at which viscous force balances weight is called<\/mark><\/strong><br>A) Terminal velocity<br>B) Average velocity<br>C) Critical velocity<br>D) Uniform velocity<br><strong>Answer:<\/strong> A) Terminal velocity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">25. The higher the viscosity, the ______ the flow.<\/mark><\/strong><br>A) Slower<br>B) Faster<br>C) Constant<br>D) Chaotic<br><strong>Answer:<\/strong> A) Slower<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">26. Which of the following liquids has least viscosity?<\/mark><\/strong><br>A) Alcohol<br>B) Glycerin<br>C) Water<br>D) Honey<br><strong>Answer:<\/strong> A) Alcohol<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">27. The viscosity of air increases with<\/mark><\/strong><br>A) Increase in temperature<br>B) Decrease in temperature<br>C) Pressure<br>D) Volume<br><strong>Answer:<\/strong> A) Increase in temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">28. The viscosity of gases decreases with<\/mark><\/strong><br>A) Cooling<br>B) Heating<br>C) Compression<br>D) Motion<br><strong>Answer:<\/strong> A) Cooling<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">29. The motion of smoke in air is an example of<\/mark><\/strong><br>A) Turbulent flow<br>B) Laminar flow<br>C) Random flow<br>D) Elastic flow<br><strong>Answer:<\/strong> A) Turbulent flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">30. The flow of oil in a narrow tube is<\/mark><\/strong><br>A) Laminar<br>B) Turbulent<br>C) Uniform<br>D) Random<br><strong>Answer:<\/strong> A) Laminar<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">31. Viscosity is greater in<\/mark><\/strong><br>A) Thick fluids<br>B) Thin fluids<br>C) Air<br>D) Steam<br><strong>Answer:<\/strong> A) Thick fluids<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">32. The flow of blood in narrow capillaries is affected by<\/mark><\/strong><br>A) Viscosity<br>B) Density<br>C) Pressure<br>D) Surface tension<br><strong>Answer:<\/strong> A) Viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">33. Viscosity causes<\/mark><\/strong><br>A) Loss of mechanical energy in liquids<br>B) Gain of energy<br>C) Increase in density<br>D) None<br><strong>Answer:<\/strong> A) Loss of mechanical energy in liquids<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">34. The study of viscosity is important in<\/mark><\/strong><br>A) Lubrication design<br>B) Pipeline flow<br>C) Blood flow studies<br>D) All of these<br><strong>Answer:<\/strong> D) All of these<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">35. Liquids with low viscosity are called<\/mark><\/strong><br>A) Thin liquids<br>B) Thick liquids<br>C) Heavy liquids<br>D) Dense liquids<br><strong>Answer:<\/strong> A) Thin liquids<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">36. Viscosity provides resistance to<\/mark><\/strong><br>A) Relative motion between layers<br>B) Gravity<br>C) Cohesion<br>D) Adhesion<br><strong>Answer:<\/strong> A) Relative motion between layers<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">37. The term \u201cviscous drag\u201d refers to<\/mark><\/strong><br>A) Resistance due to viscosity<br>B) Pull due to gravity<br>C) Force due to magnetism<br>D) Air pressure difference<br><strong>Answer:<\/strong> A) Resistance due to viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">38. Oil used in machines acts as<\/mark><\/strong><br>A) Lubricant<br>B) Solvent<br>C) Coolant<br>D) Adhesive<br><strong>Answer:<\/strong> A) Lubricant<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">39. The function of a lubricant is to<\/mark><\/strong><br>A) Reduce friction<br>B) Increase friction<br>C) Cool the machine<br>D) Absorb shock<br><strong>Answer:<\/strong> A) Reduce friction<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">40. The viscosity of a lubricant should be<\/mark><\/strong><br>A) Optimum<br>B) Very high<br>C) Very low<br>D) Zero<br><strong>Answer:<\/strong> A) Optimum<br><strong>Explanation:<\/strong> Too high causes resistance; too low causes wear and tear.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">41. A fluid having zero viscosity is called<\/mark><\/strong><br>A) Ideal fluid<br>B) Real fluid<br>C) Compressible fluid<br>D) Incompressible fluid<br><strong>Answer:<\/strong> A) Ideal fluid<br><strong>Explanation:<\/strong> Ideal fluids are imaginary fluids assumed to have no internal friction.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">42. For real fluids, viscosity is always<\/mark><\/strong><br>A) Greater than zero<br>B) Equal to zero<br>C) Negative<br>D) Infinite<br><strong>Answer:<\/strong> A) Greater than zero<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">43. The unit of viscosity is the same as that of<\/mark><\/strong><br>A) Stress \u00d7 Time<br>B) Pressure \u00d7 Time<br>C) Energy<br>D) Force<br><strong>Answer:<\/strong> B) Pressure \u00d7 Time<br><strong>Explanation:<\/strong> Because viscosity measures the time-dependent resistance to flow.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">44. When a liquid flows steadily in parallel layers, each layer slides over the next. This motion is called<\/mark><\/strong><br>A) Laminar flow<br>B) Turbulent flow<br>C) Irregular motion<br>D) Wave motion<br><strong>Answer:<\/strong> A) Laminar flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">45. The flow of blood in veins is generally<\/mark><\/strong><br>A) Laminar<br>B) Turbulent<br>C) Irregular<br>D) Rotational<br><strong>Answer:<\/strong> A) Laminar<br><strong>Explanation:<\/strong> In normal conditions, blood flows in smooth layers in veins.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">46. The flow of river water during floods is<\/mark><\/strong><br>A) Turbulent<br>B) Laminar<br>C) Smooth<br>D) Uniform<br><strong>Answer:<\/strong> A) Turbulent<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">47. The flow of oil through a narrow pipe is<\/mark><\/strong><br>A) Laminar<br>B) Turbulent<br>C) Random<br>D) Chaotic<br><strong>Answer:<\/strong> A) Laminar<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">48. The flow of air around an aircraft is<\/mark><\/strong><br>A) Turbulent<br>B) Laminar<br>C) Irregular<br>D) Rotational<br><strong>Answer:<\/strong> A) Turbulent<br><strong>Explanation:<\/strong> Air currents are irregular due to speed and pressure differences.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">49. The resistance to motion in fluids is due to<\/mark><\/strong><br>A) Viscosity<br>B) Density<br>C) Temperature<br>D) Pressure<br><strong>Answer:<\/strong> A) Viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">50. A highly viscous fluid will have<\/mark><\/strong><br>A) Strong internal friction<br>B) Weak internal friction<br>C) No internal friction<br>D) Random motion<br><strong>Answer:<\/strong> A) Strong internal friction<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">51. The viscosity of thick engine oil compared to water is<\/mark><\/strong><br>A) Much greater<br>B) Less<br>C) Same<br>D) Equal<br><strong>Answer:<\/strong> A) Much greater<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">52. Viscosity causes energy loss in<\/mark><\/strong><br>A) Fluid flow<br>B) Elastic collision<br>C) Heat transfer<br>D) Light reflection<br><strong>Answer:<\/strong> A) Fluid flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>53. The temperature at which viscosity of a liquid is measured is usually<\/strong><br><\/mark>A) Room temperature<br>B) Freezing temperature<br>C) Boiling temperature<br>D) Critical temperature<br><strong>Answer:<\/strong> A) Room temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">54. The layer of liquid in contact with solid boundary has<\/mark><\/strong><br>A) Zero velocity<br>B) Maximum velocity<br>C) Random velocity<br>D) Constant velocity<br><strong>Answer:<\/strong> A) Zero velocity<br><strong>Explanation:<\/strong> Due to adhesion, the liquid layer sticks to the solid surface.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">55. The flow of ink in a pen is controlled by<\/mark><\/strong><br>A) Viscosity<br>B) Capillarity<br>C) Density<br>D) Elasticity<br><strong>Answer:<\/strong> A) Viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">56. Which of the following liquids has the highest viscosity?<\/mark><\/strong><br>A) Honey<br>B) Oil<br>C) Water<br>D) Alcohol<br><strong>Answer:<\/strong> A) Honey<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">57. Which of the following has the lowest viscosity?<\/mark><\/strong><br>A) Air<br>B) Water<br>C) Kerosene<br>D) Alcohol<br><strong>Answer:<\/strong> A) Air<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">58. The viscosity of gases arises mainly due to<\/mark><\/strong><br>A) Momentum transfer between molecules<br>B) Density<br>C) Pressure<br>D) Cohesion<br><strong>Answer:<\/strong> A) Momentum transfer between molecules<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">59. Liquids which flow easily are said to be<\/mark><\/strong><br>A) Less viscous<br>B) Highly viscous<br>C) Non-viscous<br>D) Ideal<br><strong>Answer:<\/strong> A) Less viscous<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">60. Honey flows slowly because<\/mark><\/strong><br>A) It has high viscosity<br>B) It is dense<br>C) It is sticky<br>D) It has low temperature<br><strong>Answer:<\/strong> A) It has high viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">61. The viscosity of motor oil is important because it<\/mark><\/strong><br>A) Determines friction in engine parts<br>B) Controls color of oil<br>C) Affects fuel consumption<br>D) Changes density<br><strong>Answer:<\/strong> A) Determines friction in engine parts<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">62. If viscosity is too high in a lubricant, it will<\/mark><\/strong><br>A) Cause resistance and heat<br>B) Improve speed<br>C) Decrease power<br>D) Make oil lighter<br><strong>Answer:<\/strong> A) Cause resistance and heat<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">63. The viscosity of water is greater at<\/mark><\/strong><br>A) Low temperature<br>B) High temperature<br>C) Boiling point<br>D) Constant pressure<br><strong>Answer:<\/strong> A) Low temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">64. The viscosity of air is greater at<\/mark><\/strong><br>A) High temperature<br>B) Low temperature<br>C) Constant pressure<br>D) Room temperature<br><strong>Answer:<\/strong> A) High temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">65. The effect of temperature on viscosity is<\/mark><\/strong><br>A) Opposite for liquids and gases<br>B) Same for both<br>C) Irregular<br>D) Negligible<br><strong>Answer:<\/strong> A) Opposite for liquids and gases<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">66. The unit of viscosity is the same as<\/mark><\/strong><br>A) Stress \u00d7 Time<br>B) Force \u00d7 Time<br>C) Pressure \u00d7 Time<br>D) Density \u00d7 Velocity<br><strong>Answer:<\/strong> C) Pressure \u00d7 Time<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">67. The term \u201cviscous drag\u201d refers to<\/mark><\/strong><br>A) Retarding force due to viscosity<br>B) Pulling force<br>C) Buoyant force<br>D) Pressure difference<br><strong>Answer:<\/strong> A) Retarding force due to viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">68. The terminal velocity of a body in a fluid depends on<\/mark><\/strong><br>A) Viscosity of fluid<br>B) Density of fluid<br>C) Size of body<br>D) All of these<br><strong>Answer:<\/strong> D) All of these<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">69. The upward force acting on a body falling in a viscous fluid is<\/mark><\/strong><br>A) Viscous drag<br>B) Buoyant force<br>C) Friction<br>D) Surface tension<br><strong>Answer:<\/strong> A) Viscous drag<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">70. At terminal velocity, a falling object<\/mark><\/strong><br>A) Falls with constant speed<br>B) Speeds up continuously<br>C) Stops moving<br>D) Falls with uniform acceleration<br><strong>Answer:<\/strong> A) Falls with constant speed<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">71. A sphere falls slowly in honey because<\/mark><\/strong><br>A) Honey has large viscosity<br>B) Honey is dense<br>C) Honey is sticky<br>D) Air bubbles stop motion<br><strong>Answer:<\/strong> A) Honey has large viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">72. The viscosity of water is affected by<\/mark><\/strong><br>A) Impurities and temperature<br>B) Color of water<br>C) Shape of container<br>D) Atmospheric pressure<br><strong>Answer:<\/strong> A) Impurities and temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">73. The force responsible for slowing down a moving ship in water is<\/mark><\/strong><br>A) Viscous drag<br>B) Buoyant force<br>C) Surface tension<br>D) Inertia<br><strong>Answer:<\/strong> A) Viscous drag<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">74. The flow of tar is an example of<\/mark><\/strong><br>A) Very high viscosity<br>B) Very low viscosity<br>C) Zero viscosity<br>D) Ideal flow<br><strong>Answer:<\/strong> A) Very high viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">75. The flow of gas through a narrow tube is<\/mark><\/strong><br>A) Viscous flow<br>B) Turbulent flow<br>C) Random flow<br>D) Ideal flow<br><strong>Answer:<\/strong> A) Viscous flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">76. Oil spreads more easily on a surface when its viscosity is<\/mark><\/strong><br>A) Low<br>B) High<br>C) Constant<br>D) Zero<br><strong>Answer:<\/strong> A) Low<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">77. The flow of lava during volcanic eruption is affected by<\/mark><\/strong><br>A) Viscosity of molten rock<br>B) Temperature of air<br>C) Density of ground<br>D) Gravity<br><strong>Answer:<\/strong> A) Viscosity of molten rock<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">78. Syrup flows slowly compared to water because<\/mark><\/strong><br>A) Syrup is more viscous<br>B) Syrup is dense<br>C) Syrup is sticky<br>D) Syrup is cold<br><strong>Answer:<\/strong> A) Syrup is more viscous<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">79. Viscosity helps to explain<\/mark><\/strong><br>A) Resistance in fluid motion<br>B) Diffusion of gases<br>C) Thermal conduction<br>D) Light reflection<br><strong>Answer:<\/strong> A) Resistance in fluid motion<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">80. The viscosity of air at room temperature is<\/mark><\/strong><br>A) Very low<br>B) Very high<br>C) Equal to that of water<br>D) Zero<br><strong>Answer:<\/strong> A) Very low<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">81. Viscosity is greater in<\/mark><\/strong><br>A) Syrup<br>B) Alcohol<br>C) Petrol<br>D) Water<br><strong>Answer:<\/strong> A) Syrup<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">82. A lubricant should have<\/mark><\/strong><br>A) Moderate viscosity<br>B) Very high viscosity<br>C) Very low viscosity<br>D) Constant viscosity<br><strong>Answer:<\/strong> A) Moderate viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">83. When temperature increases, viscosity of oil<\/mark><\/strong><br>A) Decreases<br>B) Increases<br>C) Remains same<br>D) Doubles<br><strong>Answer:<\/strong> A) Decreases<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">84. When a ball falls through air, it eventually attains<\/mark><\/strong><br>A) Terminal velocity<br>B) Zero velocity<br>C) Acceleration<br>D) Infinite velocity<br><strong>Answer:<\/strong> A) Terminal velocity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">85. The study of viscosity helps in designing<\/mark><\/strong><br>A) Pipelines<br>B) Engines<br>C) Chemical plants<br>D) All of these<br><strong>Answer:<\/strong> D) All of these<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">86. Viscosity of gases depends more on<\/mark><\/strong><br>A) Temperature<br>B) Pressure<br>C) Color<br>D) Volume<br><strong>Answer:<\/strong> A) Temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">87. The viscosity of water is least at<\/mark><\/strong><br>A) High temperature<br>B) Low temperature<br>C) Room temperature<br>D) Freezing point<br><strong>Answer:<\/strong> A) High temperature<\/p>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>88. The resistance experienced by a ship moving in water is mainly due to<\/strong><br><\/mark>A) Viscosity of water<br>B) Density of water<br>C) Buoyancy<br>D) Surface tension<br><strong>Answer:<\/strong> A) Viscosity of water<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">89. Viscosity opposes<br><\/mark><\/strong>A) Relative motion between fluid layers<br>B) Gravity<br>C) Heat<br>D) Friction<br><strong>Answer:<\/strong> A) Relative motion between fluid layers<\/p>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>90. The drag on a moving vehicle in air is mainly due to<\/strong><br><\/mark>A) Air viscosity<br>B) Air density<br>C) Friction of road<br>D) Humidity<br><strong>Answer:<\/strong> A) Air viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">91. The flow of paint from a brush depends on<\/mark><\/strong><br>A) Viscosity<br>B) Density<br>C) Surface tension<br>D) Pressure<br><strong>Answer:<\/strong> A) Viscosity<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">92. The viscosity of liquids is greater than gases because<\/mark><\/strong><br>A) Liquids have stronger cohesive forces<br>B) Liquids are less dense<br>C) Gases are heavier<br>D) Liquids have weak adhesion<br><strong>Answer:<\/strong> A) Liquids have stronger cohesive forces<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">93. The opposite of viscosity is<\/mark><\/strong><br>A) Fluidity<br>B) Density<br>C) Elasticity<br>D) Friction<br><strong>Answer:<\/strong> A) Fluidity<br><strong>Explanation:<\/strong> Fluidity means ease of flow; it is the reciprocal of viscosity.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">94. The viscosity of tar compared to water is<\/mark><\/strong><br>A) Extremely high<br>B) Equal<br>C) Zero<br>D) Low<br><strong>Answer:<\/strong> A) Extremely high<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">95. The viscosity of gases increases with temperature because<\/mark><\/strong><br>A) Molecules collide more often<br>B) Density decreases<br>C) Cohesion increases<br>D) Pressure drops<br><strong>Answer:<\/strong> A) Molecules collide more often<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">96. The property that helps the motion of rain through air is<\/mark><\/strong><br>A) Low viscosity of air<br>B) High density of air<br>C) Elasticity of air<br>D) Surface tension<br><strong>Answer:<\/strong> A) Low viscosity of air<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">97. The viscosity of mercury compared to water is<\/mark><\/strong><br>A) Higher<br>B) Lower<br>C) Equal<br>D) Zero<br><strong>Answer:<\/strong> A) Higher<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">98. The motion of clouds in air shows<\/mark><\/strong><br>A) Turbulent flow<br>B) Laminar flow<br>C) Random flow<br>D) Elastic flow<br><strong>Answer:<\/strong> A) Turbulent flow<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">99. The property that causes a raindrop to fall slowly in air is<\/mark><\/strong><br>A) Viscosity of air<br>B) Surface tension<br>C) Density<br>D) Capillarity<br><strong>Answer:<\/strong> A) Viscosity of air<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">100. Viscosity is most useful in<\/mark><\/strong><br>A) Designing lubricants and predicting fluid flow<br>B) Making magnets<br>C) Producing electricity<br>D) Mixing chemicals<br><strong>Answer:<\/strong> A) Designing lubricants and predicting fluid flow<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. The property of a liquid by virtue of which it opposes relative motion between its layers is calledA) ViscosityB) ElasticityC) DensityD) PressureAnswer: A) ViscosityExplanation: Viscosity measures internal friction between moving layers of fluid. 2. The force of friction between adjacent layers of a liquid in motion is calledA) Viscous forceB) Cohesive forceC) Adhesive forceD)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17623","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-blog"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=17623"}],"version-history":[{"count":2,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17623\/revisions"}],"predecessor-version":[{"id":17650,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17623\/revisions\/17650"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=17623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=17623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=17623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}