MCQOPTIONS
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MCQOPTIONS
This section includes 248 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. |
Dynamic viscosity of most of the gases with rise in temperature___________________? |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | unpredictable |
| E. | none of the above |
| Answer» B. decreases | |
| 152. |
During the opening of a valve in a pipe line, the flow is___________________? |
| A. | steady |
| B. | unsteady |
| C. | uniform |
| D. | laminar |
| E. | free vortex type |
| Answer» C. uniform | |
| 153. |
Dimensions of surface tension are_________________? |
| A. | MlL°T2 |
| B. | MlL°Tx |
| C. | MlL r2 |
| D. | MlL2T2 |
| E. | MlL°t |
| Answer» B. MlL°Tx | |
| 154. |
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 |
| E. | velocity in pipes |
| Answer» E. velocity in pipes | |
| 155. |
Density of water is maximum at ___________________? |
| A. | 0°C |
| B. | 0°K |
| C. | 4°C |
| D. | 100°C |
| E. | 20°C. |
| Answer» E. 20°C. | |
| 156. |
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 |
| E. | Viscosity is expressed as poise, stoke, or saybolt seconds |
| Answer» E. Viscosity is expressed as poise, stoke, or saybolt seconds | |
| 157. |
Choose the wrong statement___? |
| A. | fluids are capable of flowing |
| B. | fluids conform to the shape of the con-taining vessels |
| C. | when in equilibrium, fluids cannot sustain tangential forces |
| D. | when in equilibrium, fluids can sustain shear forces |
| E. | fluids have some degree of compressibility and offer little resistance to form |
| Answer» E. fluids have some degree of compressibility and offer little resistance to form | |
| 158. |
Choose the wrong statement__? |
| A. | any weight, floating or immersed in a liquid, is acted upon by a buoyant force |
| B. | Buoyant force is equal to the weight of the liquid displaced |
| C. | The point through which buoyant force acts, is called the center of buoyancy |
| D. | Center of buoyancy is located above the center of gravity of the displaced liquid v |
| E. | Relative density of liquids can be determined by means of the depth of flotation of hydrometer |
| Answer» E. Relative density of liquids can be determined by means of the depth of flotation of hydrometer | |
| 159. |
Choose the wrong statement_? |
| A. | The center of buoyancy is located at the center of gravity of the displaced liquid |
| B. | For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy |
| C. | If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions |
| D. | For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy |
| E. | All floating bodies are stable |
| Answer» F. | |
| 160. |
Choose the wrong statement___________________? |
| A. | The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface |
| B. | The horizontal component acts through the center of pressure for the vertical projection |
| C. | The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area |
| D. | he vertical component passes through the center of pressure of the volume |
| E. | Center of pressure acts at a greater depth than center of gravity |
| Answer» E. Center of pressure acts at a greater depth than center of gravity | |
| 161. |
Choose the correct relationship_________________? |
| A. | specific gravity = gravity x density |
| B. | dynamicviscosity = kinematicviscosity x density |
| C. | gravity = specific gravity x density |
| D. | kinematicviscosity = dynamicviscosity x density |
| E. | hydrostaticforce = surface tension x gravity |
| Answer» C. gravity = specific gravity x density | |
| 162. |
Centre of pressure compared to e.g. is______________? |
| A. | above it |
| B. | below it |
| C. | at same point |
| D. | above or below depending on area of body |
| E. | none of the above |
| Answer» C. at same point | |
| 163. |
Center of pressure on an inclined plane is______________________? |
| A. | at the centroid |
| B. | above the centroid |
| C. | below the centroid |
| D. | at metacentre |
| E. | at center of pressure |
| Answer» D. at metacentre | |
| 164. |
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 |
| E. | none of the above |
| Answer» B. center of pressure of displaced volume | |
| 165. |
Cavitation will begin when______________________? |
| A. | the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid |
| B. | pressure becomes more than critical pressure |
| C. | flow is increased |
| D. | pressure is increased |
| E. | none of the above |
| Answer» B. pressure becomes more than critical pressure | |
| 166. |
Cavitation is caused by___________________? |
| A. | high velocity |
| B. | high pressure |
| C. | weak material |
| D. | low pressure |
| E. | low viscosity |
| Answer» E. low viscosity | |
| 167. |
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 |
| E. | none of the above |
| Answer» E. none of the above | |
| 168. |
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 |
| E. | none of the above |
| Answer» E. none of the above | |
| 169. |
Bernoulli equation deals with the law of conservation of____________________? |
| A. | mass |
| B. | momentum |
| C. | energy |
| D. | work |
| E. | force |
| Answer» D. work | |
| 170. |
Barometer is used to measure__________________? |
| A. | pressure in pipes, channels etc |
| B. | atmospheric pressure |
| C. | very low pressure |
| D. | difference of pressure between two points |
| E. | rain level |
| Answer» C. very low pressure | |
| 171. |
At the centre 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. | negative value |
| E. | could be any value |
| Answer» F. | |
| 172. |
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 |
| E. | none of the above |
| Answer» D. any one of above is possible | |
| 173. |
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of_________________? |
| A. | 1 |
| B. | 1.2 |
| C. | 0.8 |
| D. | 0.75 |
| E. | 1.25 |
| Answer» E. 1.25 | |
| 174. |
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is___________________? |
| A. | 10m/sec2 |
| B. | 9.81 m/sec2 |
| C. | 10.2/m sec |
| D. | 9.75 m/sec2 |
| E. | 9 m/sec |
| Answer» B. 9.81 m/sec2 | |
| 175. |
An ideal flow of any fluid must satisfy ___________________? |
| A. | Pascal law |
| B. | Newton’s law of viscosity |
| C. | boundary layer theory |
| D. | continuity equation |
| E. | Bernoulli’s theorem |
| Answer» E. Bernoulli’s theorem | |
| 176. |
An ideal flow of any fluid must fulfill the following______________? |
| A. | Newton’s law of motion |
| B. | Newton’s law of viscosity |
| C. | Pascal’ law |
| D. | Continuity equation |
| E. | Boundary layer theory |
| Answer» E. Boundary layer theory | |
| 177. |
All the terms of energy in Bernoulli’s equation have dimension of_______________? |
| A. | energy |
| B. | work |
| C. | mass |
| D. | length |
| E. | time |
| Answer» E. time | |
| 178. |
Alcohol is used in manometers because_____________________? |
| A. | it has low vapour pressure |
| B. | it is clearly visible |
| C. | it has low surface tension |
| D. | it can provide longer column due to low density |
| E. | is provides suitable meniscus |
| Answer» E. is provides suitable meniscus | |
| 179. |
Alcohol is used in manometer, because___________________?_x005F_x000D_Choose the wrong statement ? |
| 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 |
| E. | it provides accurate readings |
| Answer» B. it provides suitable meniscus for the inclined tube | |
| 180. |
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 |
| E. | weight of body plus the weight of the fluid displaced hy the body |
| Answer» E. weight of body plus the weight of the fluid displaced hy the body | |
| 181. |
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 |
| E. | none of the above |
| Answer» E. none of the above | |
| 182. |
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 |
| E. | which occurs in all flows |
| Answer» D. along which the pressure drop is uniform | |
| 183. |
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 |
| E. | 30,000 kg |
| Answer» C. 18,000 kg | |
| 184. |
A pressure of 25 m of head of water is equal to________________? |
| A. | 25 kN/m2 |
| B. | 245 kN/m2 |
| C. | 2500 kN/m2 |
| D. | 2.5kN/m2 |
| E. | 12.5 kN/m2 |
| Answer» C. 2500 kN/m2 | |
| 185. |
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. | |
| 186. |
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 |
| E. | none of the above |
| Answer» C. 0.4 | |
| 187. |
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ? |
| A. | the metal piece will simply float over the mercury |
| B. | the metal piece will be immersed in mercury by half |
| C. | whole of the metal piece will be immersed with its top surface just at mercury level |
| D. | metal piece will sink to the bottom |
| E. | none of the above |
| Answer» D. metal piece will sink to the bottom | |
| 188. |
A perfect gas_________________? |
| A. | has constant viscosity |
| B. | has zero viscosity |
| C. | is incompressible |
| D. | is of theoretical interest |
| E. | none of the above |
| Answer» F. | |
| 189. |
A one dimensional flow is one which___________________? |
| A. | is uniform flow |
| B. | is steady uniform flow |
| C. | takes place in straight lines |
| D. | involves zero transverse component of flow |
| E. | takes place in one dimension |
| Answer» E. takes place in one dimension | |
| 190. |
A metal with specific gravity of o floating in a fluid of same specific gravity a will___________________? |
| A. | sink to bottom |
| B. | float over fluid |
| C. | partly immersed |
| D. | be fully immersed with top surface at fluid surface |
| E. | none of the above |
| Answer» E. none of the above | |
| 191. |
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are_________________? |
| A. | less |
| B. | more |
| C. | equal |
| D. | less at low temperature and more at high temperature |
| E. | there is no such criterion |
| Answer» C. equal | |
| 192. |
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 |
| E. | none of the above |
| Answer» C. 40 x 105 kg/cm2 | |
| 193. |
A large Roynold number is indication of_________________? |
| A. | smooth and streamline flow |
| B. | laminar flow |
| C. | steady flow |
| D. | turbulent flow |
| E. | highly turbulent flow |
| Answer» F. | |
| 194. |
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 |
| E. | 10,000 kg |
| Answer» B. 100 kg | |
| 195. |
A fluid is said to be ideal, if it is________________? |
| A. | incompressible |
| B. | inviscous |
| C. | viscous and incompressible |
| D. | inviscous and compressible |
| E. | inviscous and incompressible |
| Answer» F. | |
| 196. |
A fluid in equilibrium can’t sustain_________________? |
| A. | tensile stress |
| B. | compressive stress |
| C. | shear stress |
| D. | bending stress |
| E. | all of the above |
| Answer» D. bending stress | |
| 197. |
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________? |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | increase/decrease depending on depth of immersion |
| Answer» D. increase/decrease depending on depth of immersion | |
| 198. |
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 | |
| 199. |
A balloon lifting in air follows the following principle_________________? |
| A. | law of gravitation |
| B. | Archimedes principle |
| C. | principle of buoyancy |
| D. | all of the above |
| Answer» E. | |
| 200. |
4-61. Kinematic viscosity is equal to________________? |
| A. | dynamic viscosity/density |
| B. | dynamicviscosity x density |
| C. | density/dynamic viscosity |
| D. | 1/dynamicviscosity x density |
| Answer» B. dynamicviscosity x density | |