MCQOPTIONS
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MCQOPTIONS
This section includes 365 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
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. | |
| 202. |
An open vessel of water is accelerated up an inclined plane. The free water surface will |
| A. | be horizontal |
| B. | make an angle in direction of inclination of inclined plane |
| C. | make an angle in opposite direction to inclination of inclined plane |
| D. | any one of above is possible |
| Answer» D. any one of above is possible | |
| 203. |
A large Roynold number is indication of |
| A. | smooth and streamline flow |
| B. | laminar flow |
| C. | steady flow |
| D. | highly turbulent flow. |
| Answer» E. | |
| 204. |
Center of pressure on an inclined plane is |
| A. | at the centroid |
| B. | above the centroid |
| C. | below the centroid |
| D. | at metacentre |
| Answer» D. at metacentre | |
| 205. |
The two important forces for a floating body are |
| A. | buoyancy, gravity |
| B. | buoyancy, pressure |
| C. | buoyancy, inertial |
| D. | inertial, gravity |
| Answer» B. buoyancy, pressure | |
| 206. |
The fluid forces considered in the Navier Stokes equation are |
| A. | gravity, pressure and viscous |
| B. | gravity, pressure and turbulent |
| C. | pressure, viscous and turbulent |
| D. | gravity, viscous and turbulent |
| Answer» B. gravity, pressure and turbulent | |
| 207. |
For a floating body to be in equilibrium |
| A. | meta center should be above e.g. |
| B. | center of buoyancy and e.g. must lie on same vertical plane |
| C. | a righting couple should be formed |
| D. | all of the above |
| Answer» E. | |
| 208. |
For a floating body to be in stable equilibrium, its metacentre should be |
| A. | below the center of gravity |
| B. | below the center of buoyancy |
| C. | above the center of buoyancy |
| D. | above the center of gravity |
| Answer» E. | |
| 209. |
All the terms of energy in Bernoulli’s equation have dimension of |
| A. | energy |
| B. | work |
| C. | mass |
| D. | length |
| Answer» E. | |
| 210. |
The equation of continuity holds good when the flow |
| A. | is steady |
| B. | is one dimensional |
| C. | velocity is uniform at all the cross sec-tions |
| D. | all of the above |
| Answer» E. | |
| 211. |
According to Bernoulli’s equation for steady ideal fluid flow |
| A. | principle of conservation of mass holds |
| B. | velocity and pressure are inversely proportional |
| C. | total energy is constant throughout |
| D. | the energy is constant along a stream-line but may vary across streamlines |
| Answer» E. | |
| 212. |
Ratio of inertia force to elastic force is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynold’s number |
| D. | Weber’s number |
| Answer» B. Froude number | |
| 213. |
The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream |
| A. | keeps on increasing |
| B. | keeps on decreasing |
| C. | remains constant |
| D. | may increase/decrease |
| Answer» D. may increase/decrease | |
| 214. |
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ? |
| A. | 1 : 5 |
| B. | 1 : 2.5 |
| C. | 1:V5″ |
| D. | 1 : 53/2 |
| Answer» B. 1 : 2.5 | |
| 215. |
Hydrometer is used to determine |
| A. | specific gravity of liquids |
| B. | specific gravity of solids |
| C. | specific gravity of gases |
| D. | relative humidity |
| Answer» B. specific gravity of solids | |
| 216. |
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. | 900 minutes |
| B. | 4 minutes |
| C. | 4 x (225)3/2 minutes |
| D. | 4 x V225 minutes. |
| Answer» E. | |
| 217. |
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ? |
| A. | 10 m/sec |
| B. | 25 m/sec |
| C. | 2 m/sec |
| D. | 50 m/sec |
| Answer» D. 50 m/sec | |
| 218. |
Pitot tube is used for measurement of |
| A. | pressure |
| B. | flow |
| C. | velocity |
| D. | dsscharge |
| Answer» D. dsscharge | |
| 219. |
Ratio of inertia force to surface Jension is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynold’s number |
| D. | Weber’s number |
| Answer» E. | |
| 220. |
resultant force acting on a floating body |
| A. | equal to the volume of liquid displaced |
| B. | force necessary to keep a body in equilibrium |
| C. | resultant force acting on a floating body |
| D. | the resultant force on a body due to the fluid surrounding it |
| Answer» E. | |
| 221. |
Normal depth in open channel flow is the depth of flow corresponding to |
| A. | steady flow |
| B. | unsteady flow |
| C. | laminar flow |
| D. | uniform flow |
| Answer» E. | |
| 222. |
When a body floating in a liquid, is displaced slightly, it oscillates about |
| A. | e.g. of body |
| B. | center of pressure |
| C. | center of buoyancy |
| D. | metacentre |
| Answer» E. | |
| 223. |
The upper surface of a weir over which water flows is known is |
| A. | crest |
| B. | nappe |
| C. | sill |
| D. | weir top |
| Answer» D. weir top | |
| 224. |
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to |
| A. | the weight of the body |
| B. | more than the weight of the body |
| C. | less than the weight of the body |
| D. | weight of the fluid displaced by the body |
| Answer» E. | |
| 225. |
For hypersonic flow, the Mach number is |
| A. | unity |
| B. | greater than unity |
| C. | greater than 2 |
| D. | greater than 4 |
| Answer» E. | |
| 226. |
For a body floating in a liquid the normal pressure exerted by the liquid acts at |
| A. | bottom surface of the body |
| B. | e.g. of the body |
| C. | metacentre |
| D. | all points on the surface of the body |
| Answer» E. | |
| 227. |
The region between the separation streamline and the boundary surface of the solid body is known as |
| A. | wake |
| B. | drag |
| C. | lift |
| D. | boundary layer |
| Answer» B. drag | |
| 228. |
In a forced vortex, the velocity of flow everywhere within the fluid is |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | non-zero finite |
| Answer» E. | |
| 229. |
Metacentre is the point of intersection of |
| A. | vertical upward force through e.g. of body and center line of body |
| B. | buoyant force and the center line of body |
| C. | mid point between e.g. and center of buoyancy |
| D. | all of the above |
| Answer» C. mid point between e.g. and center of buoyancy | |
| 230. |
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 5 meters of water column |
| D. | 6 meters of water Column |
| Answer» E. | |
| 231. |
In a free vortex motion, the radial component of velocity everywhere i |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | non-zero and finite |
| Answer» D. non-zero and finite | |
| 232. |
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is |
| A. | 2.4 m |
| B. | 3.0 m |
| C. | 4.0 m |
| D. | 2.5 m |
| Answer» C. 4.0 m | |
| 233. |
The 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 | |
| 234. |
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is |
| A. | 9,000 kg |
| B. | 13,500 kg |
| C. | 18,000 kg |
| D. | 27,000 kg |
| Answer» C. 18,000 kg | |
| 235. |
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. | |
| 236. |
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is |
| A. | 0.83 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» C. 0.4 | |
| 237. |
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. | |
| 238. |
A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ? |
| A. | 0.5 |
| B. | 0.4 |
| C. | 0.515 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 239. |
A body floats in stable equilibrium |
| A. | when its meatcentric height is zero |
| B. | when the metancentre is above e.g. |
| C. | when its e.g. is below it’s center of buoyancy |
| D. | metacentre has nothing to do with position of e.g. for determining stability |
| Answer» C. when its e.g. is below it’s center of buoyancy | |
| 240. |
Center of buoyancy is the |
| A. | centroid of the displaced volume of fluid |
| B. | center of pressure of displaced volume |
| C. | e.g. of floating ‘body |
| D. | does not exist |
| Answer» B. center of pressure of displaced volume | |
| 241. |
Two dimensional flow occurs when |
| A. | the direction and magnitude of the velocity at all points are identical |
| B. | the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time |
| C. | the magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane |
| Answer» E. | |
| 242. |
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. | |
| 243. |
A streamline is defined as the line |
| A. | parallel to central axis flow |
| B. | parallel to outer surface of pipe |
| C. | of equal yelocity in a flow |
| D. | along which the pressure drop is uniform |
| Answer» D. along which the pressure drop is uniform | |
| 244. |
The horizontal component of buoyant force is |
| A. | negligible |
| B. | zero |
| Answer» C. | |
| 245. |
Buoyant force is |
| A. | the resultant force acting on a floating body |
| B. | the resultant force on a body due to the fluid surrounding it |
| C. | equal to the volume of liquid dis-placed |
| D. | the force necessary to maintain equilibrium of a submerged body |
| Answer» C. equal to the volume of liquid dis-placed | |
| 246. |
General energy equation holds for |
| A. | steady flow |
| B. | turbulent flow |
| C. | laminar flow |
| D. | non-uniform flow |
| Answer» E. | |
| 247. |
The center of pressure of a surface subjected to fluid pressure is the point |
| A. | on the surface at which resultant pres-sure acts |
| B. | on the surface at which gravitational force acis |
| C. | at which all hydraulic forces meet |
| D. | similar to metacentre |
| Answer» B. on the surface at which gravitational force acis | |
| 248. |
Flow occurring in a pipeline when a valve is being opened is |
| A. | steady |
| B. | unsteady |
| C. | laminar |
| D. | vortex |
| Answer» C. laminar | |
| 249. |
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. | |
| 250. |
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 | |