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MCQOPTIONS
This section includes 832 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The most economical section of a rectangular channel is one which has hydraulic mean depth orhydraulic radius equal to |
| A. | Half the depth |
| B. | Half the breadth |
| C. | Twice the depth |
| D. | Twice the breadth |
| Answer» B. Half the breadth | |
| 2. |
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6m, then the weight of the body is |
| A. | 3.53 kN |
| B. | 33.3 kN |
| C. | 35.3 kN |
| D. | None of these |
| Answer» D. None of these | |
| 3. |
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome theviscous resistance will be |
| A. | Double |
| B. | Four times |
| C. | Eight times |
| D. | Sixteen times |
| Answer» E. | |
| 4. |
manometers because Alcohol is used in |
| A. | It has low vapour pressure |
| B. | It is clearly visible |
| C. | It has low surface tension |
| D. | It can provide longer column due to low density |
| Answer» E. | |
| 5. |
In order that flow takes place between two points in a pipeline, the differential pressure betweenthese points must be more than |
| A. | Frictional force |
| B. | Viscosity |
| C. | Surface friction |
| D. | All of the above |
| Answer» E. | |
| 6. |
The imaginary line drawn in the fluid in such a way that the tangent to any point gives thedirection of motion at that point, is known as |
| A. | Path line |
| B. | Stream line |
| C. | Steak line |
| D. | Potential line |
| Answer» C. Steak line | |
| 7. |
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, thenthe mouthpiece is said to be |
| A. | Running full |
| B. | Running free |
| C. | Partially running full |
| D. | Partially running free |
| Answer» C. Partially running full | |
| 8. |
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C =Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed) |
| A. | A × m × i) |
| B. | C × m × i) |
| C. | AC × m × i) |
| D. | mi × A × C) |
| Answer» D. mi × A × C) | |
| 9. |
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surfacewill be |
| A. | 1000 kg |
| B. | 4000 kg |
| C. | 2000 kg |
| D. | 8000 kg |
| Answer» B. 4000 kg | |
| 10. |
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submergedin a fluid having specific gravity of |
| A. | 1 |
| B. | 1.2 |
| C. | 0.8 |
| D. | 0.75 |
| Answer» E. | |
| 11. |
The property by virtue of which a liquid opposes relative motion between its different layers iscalled |
| A. | Surface tension |
| B. | Coefficient of viscosity |
| C. | Viscosity |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 12. |
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ halfthe height of water above the weir crest. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 13. |
A venturi -flume is used to measure |
| A. | Pressure of liquid |
| B. | Discharge of liquid |
| C. | Pressure difference between two points in a channel |
| D. | Pressure difference between two points in a pipe |
| Answer» C. Pressure difference between two points in a channel | |
| 14. |
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select thecorrect statement. |
| A. | The bodies A and B have equal stability |
| B. | The body A is more stable than body B |
| C. | The body B is more stable than body A |
| D. | The bodies A and B are unstable |
| Answer» D. The bodies A and B are unstable | |
| 15. |
When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angularvelocity, the pressure |
| A. | Varies as the square of the radial distance |
| B. | Increases linearly as its radial distance |
| C. | Increases as the square of the radial distance |
| D. | Decreases as the square of the radial distance |
| Answer» B. Increases linearly as its radial distance | |
| 16. |
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of aship is |
| A. | 4.1 s |
| B. | 5.2 s |
| C. | 10.4 s |
| D. | 14.1 s |
| Answer» D. 14.1 s | |
| 17. |
The shear stress between the two liquid layers is __________ proportional to the distancebetween two layers. |
| A. | Directly |
| B. | Inversely |
| C. | Both A and B |
| D. | None of these |
| Answer» C. Both A and B | |
| 18. |
The total energy of each particle at various places in the case of perfect incompressible fluidflowing in continuous stream |
| A. | Keeps on increasing |
| B. | Keeps on decreasing |
| C. | Remain constant |
| D. | May increase/decrease |
| Answer» D. May increase/decrease | |
| 19. |
The value of mass density in kg-sec-V- |
| A. | 1 |
| B. | 1000 |
| C. | 100 |
| D. | 101.9 |
| Answer» E. | |
| 20. |
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l =Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe) |
| A. | flv²/2gd |
| B. | flv²/gd |
| C. | 3flv²/2gd |
| D. | 4flv²/2gd |
| Answer» E. | |
| 21. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for anygiven instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 22. |
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. Thespecific gravity of wood is |
| A. | 0.83 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» C. 0.4 | |
| 23. |
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________the diameter of the orifice. |
| A. | Less than twice |
| B. | More than twice |
| C. | Less than three times |
| D. | More than three times |
| Answer» D. More than three times | |
| 24. |
In a Sutro weir, the discharge is proportional to (where H is head) |
| A. | H1/2 |
| B. | H3/2 |
| C. | H5/2 |
| D. | H |
| Answer» E. | |
| 25. |
The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to |
| A. | 1 Pa |
| B. | 91 Pa |
| C. | 981 Pa |
| D. | 9810 Pa |
| Answer» E. | |
| 26. |
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if |
| A. | the area is horizontal |
| B. | the area is vertical |
| C. | the area is inclined |
| D. | all of the above |
| Answer» E. | |
| 27. |
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is |
| A. | less than 1 |
| B. | between 1 and 100 |
| C. | 160 |
| D. | 200 |
| Answer» D. 200 | |
| 28. |
The units of viscosity are |
| A. | metre2/sec |
| B. | kg sec/metre |
| C. | newton-sec/metre2 |
| D. | newton-sec/metre |
| Answer» D. newton-sec/metre | |
| 29. |
The discharge through a V- notch varies as |
| A. | H1/2 |
| B. | H3’2 |
| C. | H5/2 |
| D. | H5’4 where H is head. |
| Answer» D. H5’4 where H is head. | |
| 30. |
The Prartdtl mixing length is |
| A. | zero at the pipe wall |
| B. | maximum at the pipe wall |
| C. | independent of shear stress |
| D. | none of the above |
| Answer» B. maximum at the pipe wall | |
| 31. |
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ? |
| A. | 4 minutes |
| B. | 4 x (225)3/2 minutes |
| C. | 4 (225)1/3 minutes |
| D. | 4 x V225 minutes |
| Answer» E. | |
| 32. |
Coefficient of velocity of venturimeter |
| A. | is independent of Reynolds number |
| B. | decreases with higher Reynolds number |
| C. | is equal to the coefficient of discharge of venturimeter |
| D. | none of the above |
| Answer» D. none of the above | |
| 33. |
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to |
| A. | 0.1 |
| B. | 0.01 |
| C. | 0.001 |
| D. | 0.0001 |
| Answer» C. 0.001 | |
| 34. |
When an ideal fluid flows past a sphere |
| A. | highest intensity of pressure occurs around the circumference at right angles to flow |
| B. | lowest pressure intensity occurs at front stagnation point |
| C. | lowest pressure intensity occurs at rear stagnation point |
| D. | total drag is zero |
| Answer» E. | |
| 35. |
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is |
| A. | at the centroid of the submerged area |
| B. | always above the centroid of the area |
| C. | always below the centroid of the area |
| D. | none of the above |
| Answer» D. none of the above | |
| 36. |
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.) |
| A. | steady flow |
| B. | uniform flow |
| C. | incompressible flow |
| D. | frictionless flow |
| Answer» B. uniform flow | |
| 37. |
Ay between two stream lines represents |
| A. | velocity |
| B. | discharge |
| C. | head |
| D. | pressure |
| Answer» C. head | |
| 38. |
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called |
| A. | surface tension |
| B. | co-efficient of viscosity |
| C. | viscosity |
| D. | osmosis |
| Answer» D. osmosis | |
| 39. |
Newton’s law of viscosity relates |
| A. | intensity of pressure and rate of angular deformation |
| B. | shear stress and rate of angular deformation |
| C. | shear stress, viscosity and temperature |
| D. | viscosity and rate of angular deformation |
| Answer» C. shear stress, viscosity and temperature | |
| 40. |
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc |
| A. | 10 kg |
| B. | 100 kg |
| C. | 1000 kg |
| D. | 1 kg |
| Answer» B. 100 kg | |
| 41. |
Two pipe systems can be said to be equivalent, when the following quantites are same |
| A. | friction loss and flow |
| B. | length and diameter |
| C. | flow and length |
| D. | friction factor and diameter |
| Answer» B. length and diameter | |
| 42. |
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is |
| A. | constant |
| B. | dependent only on Reynolds number |
| C. | a function of Reynolds number and relative roughness |
| D. | dependent on relative roughness only |
| Answer» C. a function of Reynolds number and relative roughness | |
| 43. |
The wake |
| A. | always occurs before a separation point |
| B. | always occurs after a separation point |
| C. | is a region of high pressure intensity |
| D. | none of the above |
| Answer» C. is a region of high pressure intensity | |
| 44. |
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be |
| A. | 1 m |
| B. | 10m |
| C. | 100m |
| D. | none of the above |
| Answer» D. none of the above | |
| 45. |
Euler’s dimensionless number relates the following |
| A. | inertial force and gravity |
| B. | viscous force and inertial force |
| C. | viscous force and buoyancy force |
| D. | pressure force and inertial force |
| Answer» E. | |
| 46. |
The eddy viscosity for turbulent flow is |
| A. | a function of temperature only |
| B. | a physical property of the fluid. |
| C. | dependent on the flow |
| D. | independent of the flow |
| Answer» D. independent of the flow | |
| 47. |
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to |
| A. | 16/Re |
| B. | 32/ Re |
| C. | 64/ Re |
| D. | none of the above where Re is Reynolds number. |
| Answer» D. none of the above where Re is Reynolds number. | |
| 48. |
The specific weight of water is 1000 kg/m” |
| A. | at normal pressure of 760 mm |
| B. | at 4°C temperature |
| C. | at mean sea level |
| D. | all the above |
| Answer» E. | |
| 49. |
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow |
| Answer» E. | |
| 50. |
Metacentric height for small values of angle of heel is the distance between the |
| A. | centre of gravity and centre of buoy-ancy |
| B. | centre of gravity and metacentre |
| C. | centre of buoyancy and metacentre |
| D. | free surface and centre of buoyancy |
| Answer» C. centre of buoyancy and metacentre | |