MCQOPTIONS
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MCQOPTIONS
This section includes 53 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a hydrostatic thrust bearing, Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm,film thickness=0.15mm,viscosity of lubricant=160SUS and specific gravity=0.86.Calculate frictional power loss. |
| A. | None of the listed |
| B. | 2.3kW |
| C. | 3.56kW |
| D. | 4.2kW |
| Answer» D. 4.2kW | |
| 2. |
For a hydrostatic thrust bearing,Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm,film thickness=0.15mm,viscosity of lubricant=160SUS and specific gravity=0.86.Calculate power loss in pumping. |
| A. | 2.68kW |
| B. | 3.35kW |
| C. | 2.6kW |
| D. | 4.2kW |
| Answer» D. 4.2kW | |
| 3. |
For a hydrostatic thrust bearing,Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm, film thickness=0.15mm, viscosity of lubricant=160SUS and specific gravity=0.86.Calculate flow requirement |
| A. | 0.89l/s |
| B. | 38.94l/min |
| C. | 28.8l/min |
| D. | None of the mentioned |
| Answer» C. 28.8l/min | |
| 4. |
For a hydrostatic thrust bearing,Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm, film thickness=0.15mm, viscosity of lubricant=160SUS and specific gravity=0.86.Calculate supply pressure |
| A. | 10.2Pa |
| B. | 4.01Pa |
| C. | 4.01Mpa |
| D. | 10.2Mpa |
| Answer» D. 10.2Mpa | |
| 5. |
In hydrodynamic lubrication, film thickness remains unaffected by change in speeds. |
| A. | True |
| B. | Increase with increase in speed |
| C. | Decrease with increase in speed |
| D. | Disappear as the speed tends to infinty |
| Answer» C. Decrease with increase in speed | |
| 6. |
Which of the following are not true for petroff’s equation? |
| A. | Shaft is considered concentric with the bearing |
| B. | Bearing is subjected to light load |
| C. | Is used to find coefficient of friction |
| D. | Frictional torque is given by fpr²l |
| Answer» E. | |
| 7. |
Viscosity is defined as the external resistance offered by a fluid to change its shape or relative motion of its parts. |
| A. | Yes |
| B. | It is internal resisting force |
| C. | It is not offered but exerted on the fluids |
| D. | None of the listed |
| Answer» C. It is not offered but exerted on the fluids | |
| 8. |
The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1 Poise. The upper plate is dragged to the right with a force of 5N keeping the lower plate stationary.What will be the velocity in m/s of flow at a point 0.5 cm below the lower surface of the upper plate if linear velocity profile is assumed for the flow? |
| A. | 1.25 |
| B. | 2.5 |
| C. | 12.5 |
| D. | 0.25 |
| Answer» D. 0.25 | |
| 9. |
The shear stress at a point in a liquid is found to be 0.03 N/m2. The velocity gradient at the point is 0.15 s-1. What will be it’s viscosity (in Poise)? |
| A. | 20 |
| B. | 2 |
| C. | 0.2 |
| D. | 0.5 |
| E. | ?a) 20b) 2c) 0.2d) 0.5 |
| Answer» C. 0.2 | |
| 10. |
The kinematic viscosity of a fluid is 0.1 Stokes. What will be the value is m2/s? |
| A. | 10-2 |
| B. | 10-3 |
| C. | 10-4 |
| D. | 10-5 |
| Answer» E. | |
| 11. |
Which of the following is the dimension of kinematic viscosity? |
| A. | [L1 T-1]. |
| B. | [L1 T-2]. |
| C. | [L2 T-1]. |
| D. | [L2 T-2]. |
| Answer» D. [L2 T-2]. | |
| 12. |
Which of the following is a unit of kinematic viscosity? |
| A. | Stokes |
| B. | Pa-s |
| C. | m2=s |
| D. | Poise |
| Answer» B. Pa-s | |
| 13. |
The dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get the answer in N-s/m2? |
| A. | 0.1 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» B. 1 | |
| 14. |
Which of the following is a unit of dynamic viscosity? |
| A. | [M1 L1 T-1]. |
| B. | [M1 L-1 T-1]. |
| C. | [M1 L-2 T-2]. |
| D. | [M1 L-2 T-2]. |
| Answer» C. [M1 L-2 T-2]. | |
| 15. |
The viscosity of a fluid in motion is 1 Poise. What will be it’s viscosity (in Poise) when the fluid is at rest? |
| A. | 0 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| E. | when the fluid is at rest?a) 0b) 0.5c) 1d) 2 |
| Answer» D. 2 | |
| 16. |
The viscous force the relative motion between the adjacent layers of a fluid in motion.Which one of the flowing fits best in the sentence? |
| A. | opposes |
| B. | never affects |
| C. | facilitates |
| D. | may effect under certain conditions |
| Answer» B. never affects | |
| 17. |
Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity V. What will be the velocity of the fluid in contact with the upper plate? |
| A. | V |
| B. | N ⁄ 2 |
| C. | 2V |
| D. | 0 |
| Answer» E. | |
| 18. |
1 poise = ___________ |
| A. | 10 N sm-2 |
| B. | 100 N sm-2 |
| C. | 1/100 N sm-2 |
| D. | 1/10 N sm-2 |
| Answer» E. | |
| 19. |
On increasing the temperature, the viscosity of the fluid __________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | None of the mentioned |
| Answer» B. Increases | |
| 20. |
The absolute kinematic viscosity is the ratio of __________ |
| A. | Density to absolute viscosity |
| B. | Absolute viscosity to density |
| C. | Kinetic energy to absolute viscosity |
| D. | Absolute viscosity to kinetic energy |
| Answer» C. Kinetic energy to absolute viscosity | |
| 21. |
The Newton’s law of viscosity is not applicable to __________ |
| A. | Turbulent flow |
| B. | Laminar flow |
| C. | Streamline flow |
| D. | All of the mentioned |
| Answer» B. Laminar flow | |
| 22. |
The viscosity of a fluid is inversely proportional to the __________ |
| A. | Area of contact of two adjacent layers |
| B. | Distance between two adjacent layers |
| C. | Velocity difference between two adjacent layers |
| D. | None of the mentioned |
| Answer» C. Velocity difference between two adjacent layers | |
| 23. |
The factor on which viscosity depends is __________ |
| A. | Area of contact of two adjacent layers |
| B. | Velocity difference between two adjacent layers |
| C. | The distance between two adjacent layers |
| D. | All of the mentioned |
| Answer» E. | |
| 24. |
According to Newton’s law of viscosity, the maximum velocity of flow is at __________ |
| A. | Top of the tube |
| B. | Bottom of the tube |
| C. | Middle of the tube |
| D. | It is same at all the places |
| Answer» D. It is same at all the places | |
| 25. |
WHICH_OF_THE_FOLLOWING_IS_A_UNIT_OF_KINEMATIC_VISCOSITY??$ |
| A. | Stokes |
| B. | Pa-s |
| C. | m2=s |
| D. | Poise |
| Answer» B. Pa-s | |
| 26. |
SELECT_THE_INCORRECT_STATEMENT_FROM_THE_FOLLOWING_OPTION.?$ |
| A. | Viscosity helps in the selection of good lubricating oil |
| B. | Light oils have low densities and easy flowability |
| C. | Heavy oils are used on parts moving with high speed |
| D. | Light oils do not impose much drag on high-speed parts |
| Answer» D. Light oils do not impose much drag on high-speed parts | |
| 27. |
The kinematic viscosity of a fluid is 0.1 Stokes. What will be the value is m2/s? |
| A. | 10<sup>-2</sup> |
| B. | 10<sup>-3</sup> |
| C. | 10<sup>-4</sup> |
| D. | 10<sup>-5</sup> |
| Answer» E. | |
| 28. |
For a hydrostatic thrust bearing,$ |
| A. | |
| B. | |
| Answer» C. | |
| 29. |
Which_of_the_following_is_the_dimension_of_kinematic_viscosity? |
| A. | [L<sup>1</sup> T<sup>-1</sup>]. |
| B. | [L<sup>1</sup> T<sup>-2</sup>]. |
| C. | [L<sup>2</sup> T<sup>-1</sup>]. |
| D. | [L<sup>2</sup> T<sup>-2</sup>]. |
| Answer» D. [L<sup>2</sup> T<sup>-2</sup>]. | |
| 30. |
1_poise_=$ |
| A. | 10 N sm<sup>-2</sup> |
| B. | 100 N sm<sup>-2</sup> |
| C. | 1/100 N sm<sup>-2</sup> |
| D. | 1/10 N sm<sup>-2</sup> |
| Answer» E. | |
| 31. |
For a hydrostatic thrust bearing, Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm,film thickness=0.15mm,viscosity of lubricant=160SUS and specific gravity=0.86. |
| A. | |
| B. | None of the listed |
| C. | 2.3kW |
| Answer» D. | |
| 32. |
The_shear_stress_at_a_point_in_a_liquid_is_found_to_be_0.03_N/m2._The_velocity_gradient_at_the_point_is_0.15_s-1._What_will_be_it’s_viscosity_(in_Poise)?$ |
| A. | 20 |
| B. | 2 |
| C. | 0.2 |
| D. | 0.5 |
| Answer» C. 0.2 | |
| 33. |
In hydrodynamic lubrication, film thickness remains unaffected by change in speeds? |
| A. | True |
| B. | Increase with increase in speed |
| C. | Decrease with increase in speed |
| D. | Disappear as the speed tends to infinty |
| Answer» C. Decrease with increase in speed | |
| 34. |
The dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get the answer in N-s/m2? |
| A. | 0.1 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» B. 1 | |
| 35. |
How does viscosity gets affected on increasing the pressure? |
| A. | Viscosity increases |
| B. | Viscosity decreases |
| C. | Viscosity does not get affected by the pressure |
| D. | None of the mentioned |
| Answer» B. Viscosity decreases | |
| 36. |
Which one of the following is the CGS unit of dynamic viscosity? |
| A. | Stokes |
| B. | Pa-s |
| C. | m<sup>2</sup>/s |
| D. | Poise |
| Answer» E. | |
| 37. |
Which of the following are not true for petroff’s equation?$ |
| A. | Shaft is considered concentric with the bearing |
| B. | Bearing is subjected to light load |
| C. | Is used to find coefficient of friction |
| D. | Frictional torque is given by fpr²l |
| Answer» E. | |
| 38. |
On increasing the temperature, the viscosity of the fluid |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | None of the mentioned |
| Answer» B. Increases | |
| 39. |
Which of the following lubricant has least rate of change of viscosity w.r.t temperature. |
| A. | VI=20 |
| B. | VI=30 |
| C. | VI=40 |
| D. | VI=50 |
| Answer» E. | |
| 40. |
The absolute kinematic viscosity is the ratio of |
| A. | Density to absolute viscosity |
| B. | Absolute viscosity to density |
| C. | Kinetic energy to absolute viscosity |
| D. | Absolute viscosity to kinetic energy |
| Answer» C. Kinetic energy to absolute viscosity | |
| 41. |
Viscosity of lubricating oil decrease with increasing temperature. |
| A. | Yes |
| B. | It increases linearly |
| C. | It increases hyperbolically |
| D. | it remains constant |
| Answer» B. It increases linearly | |
| 42. |
Which one of the following is not a unit of dynamic viscosity? |
| A. | Pa-s |
| B. | N-s/m<sup>2</sup> |
| C. | Poise |
| D. | Stokes |
| Answer» E. | |
| 43. |
What is the dimension of viscosity? |
| A. | MLT<sup>2</sup> |
| B. | M<sup>1</sup>L<sup>-1</sup>T |
| C. | ML<sup>-1</sup>T<sup>-1</sup> |
| D. | ML<sup>-2</sup>T<sup>1</sup> |
| Answer» D. ML<sup>-2</sup>T<sup>1</sup> | |
| 44. |
Calculate the kinematic viscosity if Saybolt viscosity is 400cSt. |
| A. | 400SUS |
| B. | 40.25SUS |
| C. | 86.32SUS |
| D. | 87.55SUS |
| Answer» E. | |
| 45. |
Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature? |
| A. | Viscosity increases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas |
| B. | Viscosity increases with the increase in temperature of a liquid and increases with the increase in temperature of a gas |
| C. | Viscosity decreases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas |
| D. | Viscosity decreases with the increase in temperature of a liquid and increases with the increase in temperature of a gas |
| Answer» B. Viscosity increases with the increase in temperature of a liquid and increases with the increase in temperature of a gas | |
| 46. |
The Newton’s law of viscosity is not applicable to$ |
| A. | Turbulent flow |
| B. | Laminar flow |
| C. | Streamline flow |
| D. | All of the mentioned |
| Answer» B. Laminar flow | |
| 47. |
Newton law of viscosity states that shear stress is proportional to rate of shear at any point in the fluid. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 48. |
The viscosity of a fluid in motion is 1 Poise. What will be it’s viscosity (in Poise) when the fluid is at rest?$ |
| A. | 0 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 49. |
The viscosity of a fluid is inversely proportional to the |
| A. | Area of contact of two adjacent layers |
| B. | Distance between two adjacent layers |
| C. | Velocity difference between two adjacent layers |
| D. | None of the mentioned |
| Answer» C. Velocity difference between two adjacent layers | |
| 50. |
Stream line flow happens when intermediate layers move with velocities proportional to the square of distance from the stationary plate. |
| A. | True |
| B. | False |
| Answer» C. | |