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.
| 151. |
If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then |
| A. | he pressure throughout the liquid mass is atmospheric |
| B. | here will be vacuum in the liquid |
| C. | he pressure in the liquid mass is greater than hydrostatic pressure |
| D. | one of the above |
| Answer» B. here will be vacuum in the liquid | |
| 152. |
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. | .40 cm |
| B. | .20 cm |
| C. | .10 cm |
| D. | .05 cm |
| Answer» C. .10 cm | |
| 153. |
Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by |
| A. | % |
| B. | 0% |
| C. | 5% |
| D. | 0% |
| Answer» B. 0% | |
| 154. |
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. | /3 R |
| B. | /2 R |
| C. | /3 R |
| D. | /4 R |
| Answer» B. /2 R | |
| 155. |
The horizontal component of force on a curved surface is equal to the |
| A. | roduct of pressure intensity at its centroid and area |
| B. | orce on a vertical projection of the curved surface |
| C. | eight of liquid vertically above the curved surface |
| D. | orce on the horizontal projection of the curved surface |
| Answer» C. eight of liquid vertically above the curved surface | |
| 156. |
Coefficient of velocity for Borda’s mouth piece running full is |
| A. | 0.611 |
| B. | 0.707 |
| C. | 0.855 |
| D. | 0 |
| Answer» C. 0.855 | |
| 157. |
The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head) |
| A. | /3 |
| B. | /2 |
| C. | H/5 |
| D. | H/3 |
| Answer» E. | |
| 158. |
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow) |
| A. | .423 D |
| B. | .577 D |
| C. | .223 D |
| D. | .707 D |
| Answer» C. .223 D | |
| 159. |
All the terms of energy in Bernoulli’s equation have dimension of |
| A. | nergy |
| B. | ork |
| C. | ass |
| D. | ength |
| Answer» E. | |
| 160. |
The major loss of energy in long pipes is due to |
| A. | udden enlargement |
| B. | udden contraction |
| C. | radual contraction or enlargement |
| D. | riction |
| Answer» E. | |
| 161. |
For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is |
| A. | irectly proportional to Reynolds number and independent of pipe wall roughness |
| B. | irectly proportional to pipe wall roughness and independent of Reynolds number |
| C. | nversely proportional to Reynolds number and indpendent of pipe wall roughness |
| D. | nversely proportional to Reynolds number and directly proportional to pipe wall roughness |
| Answer» D. nversely proportional to Reynolds number and directly proportional to pipe wall roughness | |
| 162. |
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. | |
| 163. |
The increase in meta centric heighti) increases stabilityii) decreases stabilityiii) increases comfort for passengersiv) decreases comfort for passengersThe correct answer is |
| A. | i) and (iii) |
| B. | i) and (iv) |
| C. | ii) and (iii) |
| D. | ii) and (iv) |
| Answer» C. ii) and (iii) | |
| 164. |
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. | ess than 1 |
| B. | etween 1 and 100 |
| C. | 60 |
| D. | 00 |
| Answer» D. 00 | |
| 165. |
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. | teady flow |
| B. | niform flow |
| C. | ncompressible flow |
| D. | rictionless flow |
| Answer» B. niform flow | |
| 166. |
Ay between two stream lines represents |
| A. | elocity |
| B. | ischarge |
| C. | ead |
| D. | ressure |
| Answer» C. ead | |
| 167. |
The discharge of a liquid of kinematic viscosity 4 cm²/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is |
| A. | aminar flow |
| B. | ransition flow |
| C. | urbulent flow |
| D. | ot predictable from the given data |
| Answer» B. ransition flow | |
| 168. |
The theoretical value of coefficient of contraction of a sharp edged orifice is |
| A. | 0.611 |
| B. | 0.85 |
| C. | 0.98 |
| D. | 0 |
| Answer» B. 0.85 | |
| 169. |
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is |
| A. | /3 |
| B. | /4 |
| C. | /2 |
| D. | /3 |
| Answer» B. /4 | |
| 170. |
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is |
| A. | onstant over the cross section |
| B. | arabolic distribution across the section |
| C. | ero at the mid plane and varies linearly with distance from mid plane |
| D. | ero at plates and increases linearly to midpoint |
| Answer» D. ero at plates and increases linearly to midpoint | |
| 171. |
The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is |
| A. | /2 |
| B. | /3 |
| C. | /2 |
| Answer» B. /3 | |
| 172. |
The unit of kinematic viscosity is |
| A. | m/cm-sec² |
| B. | yne-sec/cm² |
| C. | m/cm²-sec |
| D. | m²/sec |
| Answer» E. | |
| 173. |
Choose the wrong statement.Alcohol is used in manometer, because |
| A. | ts vapour pressure is low |
| B. | t provides suitable meniscus for the inclined tube |
| C. | ts density is less |
| D. | t provides longer length for a given pressure difference |
| Answer» B. t provides suitable meniscus for the inclined tube | |
| 174. |
Pressure of the order of 10''' torr can be measured by |
| A. | ourdon tube |
| B. | irani Gauge |
| C. | icro-manometer |
| D. | onisastion gauge |
| Answer» E. | |
| 175. |
An arch with three hinges, is a structure |
| A. | Statically determinate |
| B. | Statically indeterminate |
| C. | Geometrically unstable |
| D. | Structurally sound but indeterminate |
| Answer» B. Statically indeterminate | |
| 176. |
For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal |
| A. | ratio of inertial force to force due to viscosity |
| B. | ratio of inertial force to force due to gravitation |
| C. | ratio of inertial force to force due to surface tension |
| D. | all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity |
| Answer» E. | |
| 177. |
Principle of similitude forms the basis of |
| A. | comparing two identical equipments |
| B. | designing models so that the result can be converted to prototypes |
| C. | comparing similarity between design and actual equipment |
| D. | hydraulic designs |
| Answer» C. comparing similarity between design and actual equipment | |
| 178. |
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 | |
| 179. |
Bernoulli equation deals with the law of conservation of |
| A. | mass |
| B. | momentum |
| C. | energy |
| D. | work |
| Answer» D. work | |
| 180. |
The flow in which conditions do not change with time at any point, is known as |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow |
| Answer» D. turbulent flow | |
| 181. |
The flow in which each liquid particle has a definite path and their paths do not cross each other is called |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | streamline flow |
| Answer» E. | |
| 182. |
The flow which neglects changes in a transverse direction is known as |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow |
| Answer» B. uniform flow | |
| 183. |
Steady 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» C. the magnitude and direction of the velocity do not change from point to point in the fluid | |
| 184. |
Gradually varied flow is |
| A. | steady uniform |
| B. | non-steady non-uniform |
| C. | non-steady uniform |
| D. | steady non-uniform |
| Answer» E. | |
| 185. |
Uniform flow occurs when |
| A. | the flow is steady |
| B. | the flow is streamline |
| C. | size and shape of the cross section in a particular length remain constant |
| D. | size and cross section change uniform¬ly along length |
| Answer» D. size and cross section change uniform¬ly along length | |
| 186. |
During the opening of a valve in a pipe line, the flow is |
| A. | steady |
| B. | unsteady |
| C. | uniform |
| D. | laminar |
| Answer» C. uniform | |
| 187. |
Non uniform 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 aricf direction of the velocity do not change from point to point in the fluid |
| D. | velocity, depth, pressure, etc. change from point to point in the fluid flow. |
| Answer» E. | |
| 188. |
In the case of steady flow of a fluid, the acceleration of any fluid particle is |
| A. | constant |
| B. | variable |
| C. | zero |
| D. | zero under limiting conditions |
| Answer» D. zero under limiting conditions | |
| 189. |
An ideal flow of any fluid must satisfy |
| A. | Pascal law |
| B. | Newton’s law of viscosity |
| C. | boundary layer theory |
| D. | continuity equation |
| Answer» E. | |
| 190. |
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. | |
| 191. |
Rotameter is a device used to measure |
| A. | absolute pressure |
| B. | velocity of fluid |
| C. | flow |
| D. | rotation |
| Answer» D. rotation | |
| 192. |
Hot wire anemometer is used to measure |
| A. | pressure in gases |
| B. | liquid discharge |
| C. | pressure in liquids |
| D. | gas velocities |
| Answer» E. | |
| 193. |
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be |
| A. | 1000 kg |
| B. | 4000 kg |
| C. | 2000 kg |
| D. | 8000 kg |
| Answer» B. 4000 kg | |
| 194. |
For measuring flow by a venturimeter, if should be installed in |
| A. | vertical line |
| B. | horizontal line |
| C. | inclined line with flow downward |
| D. | in any direction and in any location` |
| Answer» E. | |
| 195. |
The normal stress is same in all directions at a point in a fluid |
| A. | only when the fluid is frictionless |
| B. | only when the fluid is incompressible and has zero viscosity |
| C. | when there is no motion of one fluid layer relative to an adjacent layer |
| D. | irrespective of the motion of one fluid layer relative to an adjacent layer |
| Answer» D. irrespective of the motion of one fluid layer relative to an adjacent layer | |
| 196. |
In an immersed body, center of pressure is |
| A. | at the center of gravity |
| B. | above the center of gravity |
| C. | below be center of gravity |
| D. | could be above or below e.g. depending on density of body and liquid |
| Answer» D. could be above or below e.g. depending on density of body and liquid | |
| 197. |
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 | |
| 198. |
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 3.5 meters of water column |
| D. | 4 m of water column |
| Answer» C. 3.5 meters of water column | |
| 199. |
Differential monometer is used to measure |
| A. | pressure in pipes, channels etc. |
| B. | atmospheric pressure |
| C. | very low pressure |
| D. | difference of pressure between two points |
| Answer» E. | |
| 200. |
Resultant pressure of the liquid in the case of an immersed body acts through |
| A. | center of gravity |
| B. | center of pressure |
| C. | metacentre |
| D. | center of buoyancy |
| Answer» C. metacentre | |