MCQOPTIONS
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MCQOPTIONS
This section includes 270 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Flow of water in a pipe about 3 meters in diameter can be measured by%! |
| A. | orifice plate |
| B. | venturi |
| C. | rotameter |
| D. | pitot tube |
| Answer» E. | |
| 2. |
Choose the wrong statement.Alcohol is used in manometer, because%! |
| A. | its vapour pressure is low |
| B. | it provides suitable meniscus for the inclined tube |
| C. | its density is less |
| D. | it provides longer length for a given pressure difference |
| Answer» B. it provides suitable meniscus for the inclined tube | |
| 3. |
An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to%! |
| A. | g/3 |
| B. | g/2 |
| C. | 2g/3 |
| D. | g |
| Answer» E. | |
| 4. |
Buoyant force is%! |
| A. | resultant force acting on a floating body |
| B. | equal to the volume of liquid displaced |
| C. | force necessary to keep a body in equilibrium |
| D. | the resultant force on a body due to the fluid surrounding it |
| Answer» E. | |
| 5. |
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is%! |
| A. | 400 kg/cm² |
| B. | 4000 kg/cm² |
| C. | 40 x 105 kg/cm² |
| D. | 40 x 106 kg/cm² |
| Answer» C. 40 x 105 kg/cm¬¨‚⧠| |
| 6. |
The line of action of the buoyant force acts through the%! |
| A. | centroid of the volume of fluid vertically above the body |
| B. | center of the volume of floating body |
| C. | center of gravity of any submerged body |
| D. | centriod of the displaced volume of fluid |
| Answer» E. | |
| 7. |
Least possible value of correction factor fori) kinetic energy is zeroii) kinetic energy is 1iii) momentum is zeroiv) momentum is 1The correct statements are%! |
| A. | (i) and (iii) |
| B. | (ii) and (iii) |
| C. | (i) and (iv) |
| D. | (ii) and (iv) |
| Answer» E. | |
| 8. |
The time oscillation of a floating body with increase in metacentric height will be%! |
| A. | same |
| B. | higher |
| C. | lower |
| D. | lower/higher depending on weight of body |
| Answer» D. lower/higher depending on weight of body | |
| 9. |
Select the correct statement.%! |
| A. | The absolute roughness of a pipe de-creases with time |
| B. | A pipe becomes smooth after using for long time |
| C. | The friction factor decreases with time |
| D. | The absolute roughness increases with time |
| Answer» E. | |
| 10. |
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 | |
| 11. |
The volumetric change of the fluid caused by a resistance is known as%! |
| A. | volumetric strain |
| B. | volumetric index |
| C. | compressibility |
| D. | adhesion |
| Answer» D. adhesion | |
| 12. |
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is%! |
| A. | 5kN |
| B. | lOkN |
| C. | 15 kN |
| D. | 20 kN |
| Answer» C. 15 kN | |
| 13. |
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be%! |
| A. | 500 kg |
| B. | 1000 kg |
| C. | 1500 kg |
| D. | 2000 kg |
| Answer» E. | |
| 14. |
The units of kinematic viscosity are%! |
| A. | metres² per sec |
| B. | kg sec/meter |
| C. | newton-sec per meter |
| D. | newton-sec per meter |
| Answer» B. kg sec/meter | |
| 15. |
*$_The pressure at a point in a fluid will not be same in all the directions when the fluid is? |
| A. | moving |
| B. | viscous |
| C. | inviscous and moving |
| D. | viscous and moving. |
| Answer» E. | |
| 16. |
*$_Specific weight of water in S.I. units is equal to? |
| A. | 1000 N/m3 |
| B. | 10000 N/m3 |
| C. | 9.81 xlO3 N/m3 |
| D. | 9.81 xlO6 N/m3 |
| Answer» D. 9.81 xlO6 N/m3 | |
| 17. |
*$_A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?? |
| A. | 4 minutes |
| B. | 4 x (225)3/2 minutes |
| C. | 4 (225)1/3 minutes |
| D. | 4 x V225 minutes |
| Answer» E. | |
| 18. |
*$_The units of kinematic viscosity are? |
| A. | metres² per sec |
| B. | kg sec/meter |
| C. | newton-sec per meter |
| D. | newton-sec per meter |
| Answer» B. kg sec/meter | |
| 19. |
*$_The volumetric change of the fluid caused by a resistance is known as? |
| A. | volumetric strain |
| B. | volumetric index |
| C. | compressibility |
| D. | adhesion |
| Answer» D. adhesion | |
| 20. |
*$_The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be? |
| A. | 500 kg |
| B. | 1000 kg |
| C. | 1500 kg |
| D. | 2000 kg |
| Answer» E. | |
| 21. |
*$_Viscosity of water in comparison to mercury is? |
| A. | higher |
| B. | lower |
| C. | same |
| D. | higher/lower depending on temperature |
| Answer» B. lower | |
| 22. |
*$_A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is? |
| A. | 5kN |
| B. | lOkN |
| C. | 15 kN |
| D. | 20 kN |
| Answer» C. 15 kN | |
| 23. |
*$_An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be? |
| A. | 4 kN/m2 |
| B. | 10 kN/m2 |
| C. | 12 kN/m2 |
| D. | 14 kN/m2 |
| Answer» E. | |
| 24. |
*$_The atmospheric pressure with rise in altitude decreases? |
| A. | linearly |
| B. | first slowly and then steeply |
| C. | first steeply and then gradually |
| D. | unpredictable |
| Answer» C. first steeply and then gradually | |
| 25. |
*$_During the opening of a valve in a pipe line, the flow is? |
| A. | steady |
| B. | unsteady |
| C. | uniform |
| D. | laminar |
| Answer» C. uniform | |
| 26. |
*$_With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on? |
| A. | a circular disc of plate held normal to flow |
| B. | a sphere |
| C. | a cylinder |
| D. | a streamlined body |
| Answer» B. a sphere | |
| 27. |
*$_The pressure at the summit of a syphon is? |
| A. | equal to atmospheric |
| B. | less than atmospheric |
| C. | more than atmospheric |
| D. | none of the above |
| Answer» C. more than atmospheric | |
| 28. |
*$_Froude number is significant in? |
| A. | supersonics, as with projectile and jet propulsion |
| B. | full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc |
| C. | simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls |
| D. | all of the above |
| Answer» D. all of the above | |
| 29. |
*$_Capillary action is due to the? |
| A. | surface tension |
| B. | cohesion of the liquid |
| C. | adhesion of the liquid molecules and the molecules on the surface of a solid |
| D. | all of the above |
| Answer» E. | |
| 30. |
*$_The motion of air mass in a tornado is a? |
| A. | free vortex motion |
| B. | forced vortex motion |
| C. | free vortex at center and forced vortex outside |
| D. | forced vortex at center and free vortex outside |
| Answer» E. | |
| 31. |
*$_In case of an airfoil, the separation of flow occurs? |
| A. | at the extreme rear of body |
| B. | at the extreme front of body |
| C. | midway between rear and front of body |
| D. | any where between rear and front of body depending upon Reynolds number |
| Answer» B. at the extreme front of body | |
| 32. |
*$_Falling drops of water become spheres due to the property of? |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity |
| Answer» D. viscosity | |
| 33. |
*$_In steady flow of a fluid, the total accele ration of any fluid particle? |
| A. | can be zero |
| B. | is never zero |
| C. | is always zero |
| D. | is independent of coordinates |
| Answer» B. is never zero | |
| 34. |
*$_The ratio of absolute viscosity to mass density is known as? |
| A. | specific viscosity |
| B. | viscosity index |
| C. | kinematic viscosity |
| D. | coefficient of viscosity |
| Answer» D. coefficient of viscosity | |
| 35. |
*$_If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be? |
| A. | from reservoir A to reservoirs B and C |
| B. | from reservoir B to reservoirs C and A |
| C. | from reservoir C to reservoirs A and B |
| D. | unpredictable |
| Answer» D. unpredictable | |
| 36. |
*$_The velocity of jet of water travelling out of opening in a tank filled with water is proportional to? |
| A. | head of water (h) |
| B. | h2 |
| C. | V/T |
| D. | h2 |
| Answer» D. h2 | |
| 37. |
*$_Hot wire anemometer is used to measure? |
| A. | pressure in gases |
| B. | liquid discharge |
| C. | pressure in liquids |
| D. | gas velocities |
| Answer» E. | |
| 38. |
*$_The bulk modulus of elasticity with increase in pressure? |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | increases first upto certain limit and then decreases |
| Answer» B. decreases | |
| 39. |
*$_Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | pitot tube |
| D. | all of the above |
| Answer» E. | |
| 40. |
*$_The speed of a pressure wave through a pipe depends upon? |
| A. | the length of pipe |
| B. | the viscosity of fluid |
| C. | the bulk modulus for the fluid |
| D. | the original head |
| Answer» D. the original head | |
| 41. |
*$_Size of a venturimeter is specified by? |
| A. | pipe diameter |
| B. | throat diameter |
| C. | angle of diverging section |
| D. | both pipe diameter as well as throat diameter |
| Answer» B. throat diameter | |
| 42. |
*$_If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water? |
| A. | 51 cm |
| B. | 50 cm |
| C. | 52 cm |
| D. | 52.2 cm |
| Answer» B. 50 cm | |
| 43. |
*$_Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is? |
| A. | slightly less |
| B. | slightly more |
| C. | nearly half |
| D. | equal |
| Answer» B. slightly more | |
| 44. |
*/*_The line of action of the buoyant force acts through the centroid of the? |
| A. | submerged body |
| B. | volume of the floating body |
| C. | volume of the fluid vertically above the body |
| D. | displaced volume of the fluid |
| Answer» E. | |
| 45. |
*/*_Which of the following instrument can be used for measuring speed of an aeroplane? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | rotameter |
| D. | pitot tube |
| Answer» E. | |
| 46. |
*/*_A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is? |
| A. | 1 |
| B. | 5 |
| C. | 7 |
| D. | 6 |
| Answer» E. | |
| 47. |
*/*_The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)? |
| A. | 1/3 R |
| B. | 1/2 R |
| C. | 2/3 R |
| D. | 3/4 R |
| Answer» B. 1/2 R | |
| 48. |
*/*_The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)? |
| A. | 0.40 cm |
| B. | 0.20 cm |
| C. | 0.10 cm |
| D. | 0.05 cm |
| Answer» C. 0.10 cm | |
| 49. |
*/*_The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called? |
| A. | upthrust |
| B. | reaction |
| C. | buoyancy |
| D. | metacentre |
| Answer» D. metacentre | |
| 50. |
*/*_Choose the wrong statement? |
| A. | Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force |
| B. | Viscosity is due primarily to interaction between fluid molecules |
| C. | Viscosity of liquids decreases with in-crease in temperature |
| D. | Viscosity of liquids is appreciably affected by change in pressure |
| Answer» E. | |