MCQOPTIONS
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MCQOPTIONS
This section includes 131 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 discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach) |
| A. | (2/3) Cd L. 2g [H1 - Ha] |
| B. | (2/3) Cd L. 2g [H13/2 - Ha3/2] |
| C. | (2/3) Cd L. 2g [H12 - Ha2] |
| D. | (2/3) Cd L. 2g [H15/2 - Ha5/2] |
| Answer» C. (2/3) Cd L. 2g [H12 - Ha2] | |
| 2. |
The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe) |
| A. | (H - hf )/H |
| B. | H/(H - hf ) |
| C. | (H + hf )/H |
| D. | H/(H + hf ) |
| Answer» B. H/(H - hf ) | |
| 3. |
A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called |
| A. | Steady flow |
| B. | Uniform flow |
| C. | Streamline flow |
| D. | Turbulent flow |
| Answer» D. Turbulent flow | |
| 4. |
When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, 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 | |
| 5. |
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is |
| A. | v /2g |
| B. | v /2g |
| C. | 0.5 v /2g |
| D. | 0.375 v /2g |
| Answer» E. | |
| 6. |
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 | |
| 7. |
To generate 8.1 MW under a head of 81m while working at a speed of 540rpm, what type ofturbine is suitable? |
| A. | pelton wheel |
| B. | francis turbine |
| C. | kaplan turbine |
| D. | propeller turbine |
| Answer» C. kaplan turbine | |
| 8. |
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will |
| A. | Decrease |
| B. | Increase |
| C. | Remain unchanged |
| D. | Depend upon the characteristics of liquid |
| Answer» B. Increase | |
| 9. |
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the |
| A. | Force of adhesion |
| B. | Force of cohesion |
| C. | Force of friction |
| D. | Force of diffusion |
| Answer» C. Force of friction | |
| 10. |
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure. |
| A. | Plus |
| B. | Minus |
| C. | Divide |
| D. | Multiply |
| Answer» C. Divide | |
| 11. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 12. |
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. | |
| 13. |
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, = Angle of contact of the liquid surface, and = Surface tension) |
| A. | 4wd/ cos |
| B. | cos /4wd |
| C. | 4 cos /wd |
| D. | wd/4 cos |
| Answer» D. wd/4 cos | |
| 14. |
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Hot wire anemometer |
| D. | Pitot tube |
| Answer» E. | |
| 15. |
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 | |
| 16. |
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures. |
| A. | Sum |
| B. | Difference |
| C. | Arithmetic mean |
| D. | Geometric mean |
| Answer» C. Arithmetic mean | |
| 17. |
An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank. |
| A. | Equal to |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» C. Inversely proportional | |
| 18. |
When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called |
| A. | Gauge pressure |
| B. | Absolute pressure |
| C. | Positive gauge pressure |
| D. | Vacuum pressure |
| Answer» D. Vacuum pressure | |
| 19. |
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a |
| A. | Notch |
| B. | Weir |
| C. | Mouthpiece |
| D. | Nozzle |
| Answer» D. Nozzle | |
| 20. |
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow. |
| A. | Incompressible |
| B. | Compressible |
| C. | Viscous |
| D. | None of these |
| Answer» B. Compressible | |
| 21. |
What is the name of the equation? h = (fvL) / (2Dg) |
| A. | Darcey equation |
| B. | Poiseuille law |
| C. | Reynolds equation |
| D. | Sherwood law |
| Answer» B. Poiseuille law | |
| 22. |
What is the name of the equation? Q = ( Pr4) / (8 L) |
| A. | Darcey equation |
| B. | Poiseuille law |
| C. | Reynolds equation |
| D. | Sherwood law |
| Answer» C. Reynolds equation | |
| 23. |
The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and = Density of the fluid) |
| A. | K. |
| B. | K/ |
| C. | /K |
| D. | None of these |
| Answer» C. /K | |
| 24. |
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be |
| A. | 1/16 to 1/8 |
| B. | 1/8 to 1/4 |
| C. | 1/4 to 1/3 |
| D. | 1/3 to 1/2 |
| Answer» E. | |
| 25. |
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain. |
| A. | Equal to |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» C. Inversely proportional | |
| 26. |
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. | flv /2gd |
| B. | flv /gd |
| C. | 3flv /2gd |
| D. | 4flv /2gd |
| Answer» E. | |
| 27. |
The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is |
| A. | 32 km |
| B. | 20 km |
| C. | 8 km |
| D. | 4 km |
| Answer» B. 20 km | |
| 28. |
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, = Viscosity of the liquid, and w = Specific weight of the flowing liquid) |
| A. | 4 vl/wd |
| B. | 8 vl/wd |
| C. | 16 vl/wd |
| D. | 32 vl/wd |
| Answer» E. | |
| 29. |
For laminar flow in a pipe of circular cross-section, the Darcy s friction factor f is |
| A. | directly proportional to Reynolds number and independent of pipe wall roughness |
| B. | directly proportional to pipe wall roughness and independent of Reynolds number |
| C. | inversely proportional to Reynolds number and indpendent of pipe wall roughness |
| D. | inversely proportional to Reynolds number and directly proportional to pipe wall roughness |
| Answer» D. inversely proportional to Reynolds number and directly proportional to pipe wall roughness | |
| 30. |
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid) |
| A. | wH |
| B. | wH/2 |
| C. | wH2/2 |
| D. | wH2/3 |
| Answer» D. wH2/3 | |
| 31. |
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of |
| A. | A triangle |
| B. | A paraboloid |
| C. | An ellipse |
| D. | None of these |
| Answer» C. An ellipse | |
| 32. |
The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to (where p is pressure intensity at centroid of area and A is area of plane surface.) |
| A. | PA |
| B. | pA sin 9 |
| C. | pA cos 9 |
| D. | pA tan 9 |
| Answer» B. pA sin 9 | |
| 33. |
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies |
| A. | linearly with radial distance |
| B. | as the square of the radial distance |
| C. | inversely as the square of the radial distance |
| D. | inversely as the radial distance |
| Answer» C. inversely as the square of the radial distance | |
| 34. |
If a vessel containing liquid moves downward with a constant acceleration equal to g then |
| A. | the pressure throughout the liquid mass is atmospheric |
| B. | there will be vacuum in the liquid |
| C. | the pressure in the liquid mass is greater than hydrostatic pressure |
| D. | none of the above |
| Answer» B. there will be vacuum in the liquid | |
| 35. |
A hydraulic jump occurs at the top of a spillway. The depth before jump is 0.2m. The sequent depthis 3.2m. What is the energy dissipated in m (approximate)? |
| A. | 27 |
| B. | 10.5 |
| C. | 15 |
| D. | 42 |
| Answer» C. 15 | |
| 36. |
al to 2m and 1m respectively. If the flow is uniform and the value of Chezy s constant is 60, thedischarge through the channel is |
| A. | 1.0 m3/s |
| B. | 1.5m3/s |
| C. | 2.0m3/s |
| D. | 3.0m3/s |
| Answer» C. 2.0m3/s | |
| 37. |
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 | |
| 38. |
Flow at constant rate through a tapering pipe isi) steady flowii) uniform flowiii) unsteady flowiv) non-uniform flowThe correct answer is |
| A. | (i) and (ii) |
| B. | (i)and(iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 39. |
The discharge over a broad crested weir is maximum when the depth of (where H is the available head.) flow is |
| A. | H/3 |
| B. | H/2 |
| C. | 2 H/5 |
| D. | 2 H/3 |
| Answer» E. | |
| 40. |
Surge wave in a rectangular channel is an example ofi) steady flow ii) unsteady flow iii) uniform flow iv) non-uniform flowThe correct answer is |
| A. | (i) and (iii) |
| B. | (ii) and (iii) |
| C. | (i) and (:v) |
| D. | (ii) and (iv) |
| Answer» E. | |
| 41. |
The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice) |
| A. | Q = Cd bH (2gh) |
| B. | Q = Cd bH2 (2gh) |
| C. | Q = Cd b (H2 - H1) (2gh) |
| D. | Q = Cd bH (2gh) |
| Answer» D. Q = Cd bH (2gh) | |
| 42. |
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, theni) the ball will move to the frontii) the bubble will move to the frontiii) the ball will move to the reariv) the bubble will move to the rearFind out which of the above statements are correct ? |
| A. | (i) and (ii) |
| B. | (i)and(iv) |
| C. | (ii) and (iii) |
| D. | (iii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 43. |
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be |
| A. | Minimum |
| B. | Maximum |
| C. | Zero |
| D. | Could be any value |
| Answer» E. | |
| 44. |
Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» B. 10% | |
| 45. |
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will |
| A. | rise until its weight equals the buoyant force |
| B. | tend to move downward and it may finally sink |
| C. | float |
| D. | none of the above |
| Answer» C. float | |
| 46. |
Drag force is a function ofi) projected area of the bodyii) mass density of the fluidiii) velocity of the bodyThe correct answer is |
| A. | (i) and (ii) |
| B. | (i) and (iii) |
| C. | (ii) and (iii) |
| D. | (i), (ii) and (iii) |
| 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. | 3/4R |
| Answer» B. 1/2 R | |
| 48. |
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be |
| A. | Higher than the surface of liquid |
| B. | The same as the surface of liquid |
| C. | Lower than the surface of liquid |
| D. | Unpredictable |
| Answer» D. Unpredictable | |
| 49. |
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is |
| A. | constant over the cross section |
| B. | parabolic distribution across the section |
| C. | zero at the mid plane and varies linearly with distance from mid plane |
| D. | zero at plates and increases linearly to midpoint |
| Answer» D. zero at plates and increases linearly to midpoint | |
| 50. |
The theoretical value of coefficient of contraction of a sharp edged orifice is |
| A. | 0.611 |
| B. | 0.85 |
| C. | 0.98 |
| D. | 1.00 |
| Answer» B. 0.85 | |