MCQOPTIONS
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MCQOPTIONS
This section includes 342 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. |
The Empirical formula for discharge over large rectangular weirs, is known as |
| A. | Francis formula |
| B. | Bazin formula |
| C. | Rehbook formula |
| D. | Kutter's formula. |
| Answer» C. Rehbook formula | |
| 2. |
A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration /2 m sec. The ratio of the pressures at its bottom when it is moving vertically up and down, is |
| A. | 2 |
| B. | 3 |
| C. | 1/2 |
| D. | 1/3 |
| Answer» C. 1/2 | |
| 3. |
The time required to close a valve gradually is (where is the length of pipe and = velocity of pressure wave) |
| A. | ≤ |
| B. | > |
| C. | < |
| Answer» D. | |
| 4. |
If is the difference of liquid levels on two sides of an orifice (width , depth ), the discharge through the orifice will be |
| A. | .2 |
| B. | . |
| Answer» D. | |
| 5. |
To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m/sec, the length of water will be |
| A. | 2.48 m |
| B. | 2.49 m |
| C. | 2.50 m |
| D. | 2.51 m. |
| Answer» C. 2.50 m | |
| 6. |
The value of kinetic energy correction factor () for a laminar flow through a circular pipe, is |
| A. | 0.5 |
| B. | 1.0 |
| C. | l.5 |
| D. | 2.0 |
| E. | 2.5 |
| Answer» E. 2.5 | |
| 7. |
The formula = x x x where was suggested by : |
| A. | Bazin |
| B. | Francis |
| C. | Cipolletti |
| D. | None of these. |
| Answer» B. Francis | |
| 8. |
The minimum specific energy of flow of water in open channel is : (where is the critical depth) |
| A. | |
| Answer» D. | |
| 9. |
A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is |
| A. | 2.4 cm |
| B. | 2.5 cm |
| C. | 2.6 cm |
| D. | 2.7 cm. |
| Answer» C. 2.6 cm | |
| 10. |
In two dimensional flow the components of velocity are given by = ; = . The stream lines will be |
| A. | circular |
| B. | parabolic |
| C. | hyperbolic |
| D. | elliptical. |
| Answer» D. elliptical. | |
| 11. |
The discharg formula = x is used for rectangular |
| A. | small orifices only |
| B. | large orifices only |
| C. | small and large orifices only |
| D. | for all types of orifices. |
| Answer» C. small and large orifices only | |
| 12. |
Chezy's constant is suggested by |
| A. | Bazin |
| B. | Kutter |
| C. | Manning |
| D. | Powell. |
| Answer» B. Kutter | |
| 13. |
The acceleration required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is |
| A. | /2 |
| B. | 2 |
| C. | 2.5 |
| D. | 3 |
| E. | . |
| Answer» C. 2.5 | |
| 14. |
The dimensions MLT refers to |
| A. | specific weight |
| B. | force |
| C. | discharge |
| D. | none of these. |
| Answer» C. discharge | |
| 15. |
The differential equation /ρ + + = 0 for a fluid motion is suggested by |
| A. | Bernoulli |
| B. | Cauchy-Riemann |
| C. | Laplace |
| D. | Leonard Euler. |
| Answer» E. | |
| 16. |
For an irrotational flow, the equation is given by |
| A. | Cauchy-Riemann |
| B. | Reynold |
| C. | Laplaces |
| D. | Bernoulli. |
| Answer» D. Bernoulli. | |
| 17. |
For exerting a pressure of 4.8 kg/cm, the depth of oil (specific gravity 0.8), should be |
| A. | 40 cm |
| B. | 41 cm |
| C. | 56 cm |
| D. | 60 cm |
| E. | 76 cm. |
| Answer» E. 76 cm. | |
| 18. |
A cylindrical vessel 40 cm high is revolved about its vertical axis so that the water touches the bottom when it just spills out. If the radius of the cylinder is cm, the angular velocity of rotation, is |
| A. | 2 rad/sec |
| B. | 3 rad/sec |
| C. | 4 rad/sec |
| D. | 5 rad/sec |
| E. | none of these. |
| Answer» B. 3 rad/sec | |
| 19. |
In Newton's viscosity equation , the coefficient (μ) is known as coefficient of |
| A. | viscosity |
| B. | absolute viscosity |
| C. | dynamic viscosity |
| D. | simple viscosity |
| E. | all the above. |
| Answer» F. | |
| 20. |
In Chezy's formula = |
| A. | is the mean velocity of flow |
| B. | is the hydraulic mean depth |
| C. | is the loss of head per unit length of pipe |
| D. | All the above. |
| Answer» E. | |
| 21. |
If total head available at the inlet of pipe and is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (η) is |
| A. | 1/2 |
| B. | 2/3 |
| C. | 3/4 |
| D. | 4/5 |
| Answer» C. 3/4 | |
| 22. |
The equation for the viscosity, is suggested |
| A. | Bernoulli |
| B. | Newton |
| C. | Chezy |
| D. | Bezin |
| E. | Helmholtz. |
| Answer» C. Chezy | |
| 23. |
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. | |
| 24. |
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at is |
| A. | 14,137 kgf |
| B. | 5,863 kgf |
| C. | 20,000 kgf |
| D. | 18,000 kgf. |
| Answer» C. 20,000 kgf | |
| 25. |
A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is |
| A. | 459 kg |
| B. | 549 kg |
| C. | 945 kg |
| D. | 954 kg |
| E. | 95.4 kg. |
| Answer» E. 95.4 kg. | |
| 26. |
If S is the length of the crest, is the height of water source of a weir whose length is and discharge is m/sec, the velocity of approach is |
| A. | none of these. |
| Answer» D. | |
| 27. |
The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m/s. The head over the mouth piece is |
| A. | 2 m |
| B. | 2.5 m |
| C. | 3.0 m |
| D. | 4.0 m. |
| Answer» E. | |
| 28. |
If , , are the components of the velocity of a moving particle, the equation represents |
| A. | one diamensional flow |
| B. | two dimensional flow |
| C. | three dimensional flow |
| D. | none of these. |
| Answer» D. none of these. | |
| 29. |
The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity , is directly proportional to : |
| A. | square root of the bulk modulus of elasticity of water |
| B. | bulk modulus of elasticity of water |
| C. | specific weight of water |
| D. | none of these. |
| Answer» B. bulk modulus of elasticity of water | |
| 30. |
The length of pipe is , velocity of flow of a liquid in the pipe is . If is the time in second required to close the valve, the head of pressure |
| A. | none of these. |
| Answer» B. | |
| 31. |
For critical depth of flow of water in open channels, the specific energy must be : |
| A. | minimum |
| B. | maximum |
| C. | average of maximum and minimum |
| D. | None of these. |
| Answer» B. maximum | |
| 32. |
Kinematic viscosity of liquids by equation is determined by : |
| A. | Redwood viscometer |
| B. | Engler viscometer |
| C. | Saybolt universal viscometer |
| D. | None of these. |
| Answer» D. None of these. | |
| 33. |
The velocity of flow at the critical depth () is called critical velocity () which is equal to |
| A. | = |
| B. | x |
| C. | None of these. |
| Answer» C. None of these. | |
| 34. |
If the pressure at the inlet of a pipe is 90 kg/cm and pressure drop over the pipe line is 10 kg/cm, the efficiency of transmission, is |
| A. | 66.6% |
| B. | 77.7% |
| C. | 55.5% |
| D. | 88.8%. |
| Answer» E. | |
| 35. |
If and are the specific energies at the start of back water curve and at the maximum rise of water respectively and and are the head slope and the energy line slope respectively, the length of back water () is given by |
| A. | None of these. |
| Answer» C. | |
| 36. |
In a two dimensional flow if the components of the velocity are = ; = , the point where no motion occurs, is known as |
| A. | critical point |
| B. | neutral point |
| C. | stagnation point |
| D. | stationary point |
| E. | none of these. |
| Answer» D. stationary point | |
| 37. |
If is the diameter of a pipe of length and is the coefficient of friction of pipe then diameter of the nozzle is |
| A. | none of these. |
| Answer» B. | |
| 38. |
In a circular pipe of length and diameter , a viscous liquid is flowing with a velocity . The loss in head, is |
| A. | none of these. |
| Answer» B. | |
| 39. |
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at is |
| A. | 10,000 kgf |
| B. | 15,000 kgf |
| C. | 20,000 kgf |
| D. | 18,000 kgf. |
| Answer» E. | |
| 40. |
While applying the Bernoulli's equation = total head, the work any section done on the flow system, if any |
| A. | is added on the right side of the equation |
| B. | is added on the left side of the equation |
| C. | is ignored |
| D. | none of these. |
| Answer» C. is ignored | |
| 41. |
Discharge over a rectangular weir of length and height , is given by the equation |
| A. | = 2/3 |
| B. | |
| C. | = 2/3 |
| D. | all the above. |
| Answer» E. | |
| 42. |
When two layers of a fluid separated by move over the other with a difference of velocity , causes a shearing stress , where μ is known as |
| A. | coefficient of viscosity |
| B. | absolute viscosity |
| C. | dynamic viscosity |
| D. | viscosity |
| E. | all the above. |
| Answer» F. | |
| 43. |
A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy's constant = 54.8, pick up the correct specification of the channel from the following : |
| A. | hydraulic mean depth = 1.5 m |
| B. | Velocity of flow = 1.5 m/sec |
| C. | Rate of flow = 27 m |
| D. | /sec |
| E. | All the above. |
| Answer» E. All the above. | |
| 44. |
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm, the pressure at a depth of 2.5 m, is |
| A. | 1 metre of water |
| B. | 2 metres of water |
| C. | 3 metres of water |
| D. | 3.5 metres of water |
| E. | 4.0 metres of water. |
| Answer» D. 3.5 metres of water | |
| 45. |
______ is the branch of engineering dealing with the study of behaviour of fluid when it is at rest or in motion. |
| A. | Fluid Mechanics |
| B. | Hydraulics |
| C. | hydro statics |
| D. | Hydro dynamics |
| Answer» B. Hydraulics | |
| 46. |
______ is the branch of engineering dealing with the study of behaviour of liquid when it is at rest or in motion. |
| A. | Fluid Mechanics |
| B. | Hydraulics |
| C. | hydro statics |
| D. | Hydro dynamics |
| Answer» C. hydro statics | |
| 47. |
A fluid which is incompressible, and is having no viscosity, no surface tension, is known as ________. |
| A. | Ideal fluid |
| B. | Real fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» B. Real fluid | |
| 48. |
______ is the branch of civil engineering dealing with the behaviour of fluid when it is in motion, with reference to the force responsible for flow. |
| A. | Hydraulics |
| B. | hydro statics |
| C. | Hydro dynamics |
| D. | hydro kinematics |
| Answer» E. | |
| 49. |
A real fluid, in which the shear stress is directly proportional to the rate of shear strain (or velocity gradient), is known as ___________. |
| A. | Ideal fluid |
| B. | Real fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» D. Non-Newtonian fluid | |
| 50. |
A fluid in which shear stress is more than the yield value and shear stress is proportional to the rate of shear strain (or velocity gradient) is known as ___________. |
| A. | Ideal plastic fluid |
| B. | Real fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» B. Real fluid | |