McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 251. |
For a body floating in a liquid the normal pressure exerted by the liquid acts at |
| A. | Bottom surface of the body |
| B. | C.G. of the body |
| C. | Metacenter |
| D. | All points on the surface of the body |
| Answer» D. All points on the surface of the body | |
| 252. |
Newton's law of viscosity is a relationship between |
| A. | Pressure, velocity and temperature |
| B. | Shear stress and rate of shear strain |
| C. | Shear stress and velocity |
| D. | Rate of shear strain and temperature |
| Answer» B. Shear stress and rate of shear strain | |
| 253. |
A fluid in equilibrium can't sustain |
| A. | Tensile stress |
| B. | Compressive stress |
| C. | Shear stress |
| D. | Bending stress |
| Answer» C. Shear stress | |
| 254. |
Liquids |
| A. | Cannot be compressed |
| B. | Occupy definite volume |
| C. | Are not affected by change in pressure and temperature |
| D. | None of the above |
| Answer» D. None of the above | |
| 255. |
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» B. A paraboloid | |
| 256. |
Fluid is a substance that |
| A. | Cannot be subjected to shear forces |
| B. | Always expands until it fills any container |
| C. | Has the same shear stress at a point regardless of its motion |
| D. | Cannot remain at rest under action of any shear force |
| Answer» D. Cannot remain at rest under action of any shear force | |
| 257. |
The property of a fluid which enables it to resist tensile stress is known as |
| A. | Compressibility |
| B. | Surface tension |
| C. | Cohesion |
| D. | Adhesion |
| Answer» C. Cohesion | |
| 258. |
The surface tension of mercury at normal temperature compared to that of water is |
| A. | More |
| B. | Less |
| C. | Same |
| D. | More or less depending on size of glass tube |
| Answer» A. More | |
| 259. |
The unit of viscosity is |
| A. | Meters² per sec |
| B. | kg-sec/meter |
| C. | Newton-sec per meter² |
| D. | Newton-sec per meter |
| Answer» B. kg-sec/meter | |
| 260. |
Choose the wrong statement. Alcohol is used in manometer, because |
| 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 |
| Answer» A. Its vapour pressure is low | |
| 261. |
A fluid which obeys the Newton's law of viscosity is termed as |
| A. | Real fluid |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» C. Newtonian fluid | |
| 262. |
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than |
| A. | Frictional force |
| B. | Viscosity |
| C. | Surface friction |
| D. | All of the above |
| Answer» D. All of the above | |
| 263. |
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water. |
| A. | Decreases |
| B. | Increases |
| C. | Remain same |
| D. | None of these |
| Answer» B. Increases | |
| 264. |
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» C. Lower than the surface of liquid | |
| 265. |
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 |
| Answer» D. Involves zero transverse component of flow | |
| 266. |
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant) |
| A. | A × M × m1/2 × i2/3 |
| B. | A × M × m2/3 × i1/2 |
| C. | A1/2 × M2/3 × m × i |
| D. | A2/3 × M1/3 × m × i |
| Answer» B. A × M × m2/3 × i1/2 | |
| 267. |
The property of fluid by virtue of which it offers resistance to shear is called |
| A. | Surface tension |
| B. | Adhesion |
| C. | Adhesion |
| D. | Viscosity |
| Answer» D. Viscosity | |
| 268. |
Coefficient of velocity is defined as the ratio of |
| A. | Actual velocity of jet at vena contracta to the theoretical velocity |
| B. | Area of jet at vena contracta to the area of orifice |
| C. | Actual discharge through an orifice to the theoretical discharge |
| D. | None of the above |
| Answer» A. Actual velocity of jet at vena contracta to the theoretical velocity | |
| 269. |
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 × 10⁵ kg/cm² |
| D. | 40 × 10⁶ kg/cm² |
| Answer» B. 4000 kg/cm² | |
| 270. |
The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is |
| A. | 200 kg/m3 |
| B. | 400 kg/m3 |
| C. | 600 kg/m3 |
| D. | 800 kg/m3 |
| Answer» D. 800 kg/m3 | |
| 271. |
Free surface of a liquid tends to contract to the smallest possible area due to force of |
| A. | Surface tension |
| B. | Viscosity |
| C. | Friction |
| D. | Cohesion |
| Answer» A. Surface tension | |
| 272. |
When the Mach number is less than unity, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» A. Sub-sonic flow | |
| 273. |
The product of mass and acceleration of flowing liquid is called |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Pressure force |
| Answer» A. Inertia force | |
| 274. |
Ratio of inertia force to elastic force is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds number |
| D. | Weber's number |
| Answer» A. Mach number | |
| 275. |
Euler's number is the ratio of __________ force to pressure force. |
| A. | Inertia |
| B. | Gravity |
| C. | Viscous |
| D. | None of these |
| Answer» A. Inertia | |
| 276. |
Ratio of inertia force to surface tension is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds’s number |
| D. | Weber's number |
| Answer» D. Weber's number | |
| 277. |
The force present in a moving liquid is |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | All of these |
| Answer» D. All of these | |
| 278. |
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» C. 2 m/sec | |
| 279. |
When the Mach number is more than 6, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» D. Hyper-sonic flow | |
| 280. |
The ratio of the inertia force to the viscous force is called |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Weber's number |
| D. | Euler's number |
| Answer» A. Reynold's number | |
| 281. |
Reynold's number is the ratio of the inertia force to the |
| A. | Surface tension force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Elastic force |
| Answer» B. Viscous force | |
| 282. |
Froude number is significant in |
| A. | Supersonics, as with projectile and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls |
| D. | All of the above |
| Answer» C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls | |
| 283. |
Reynold's number is the ratio of inertia force to |
| A. | Pressure force |
| B. | Elastic force |
| C. | Gravity force |
| D. | Viscous force |
| Answer» D. Viscous force | |
| 284. |
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» B. Designing models so that the result can be converted to prototypes | |
| 285. |
Select the correct statement |
| A. | Weber's number is the ratio of inertia force to elastic force |
| B. | Weber's number is the ratio of gravity force to surface tension force |
| C. | Weber's number is the ratio of viscous force to pressure force |
| D. | Weber's number is the ratio of inertia force to surface tension force |
| Answer» D. Weber's number is the ratio of inertia force to surface tension force | |
| 286. |
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» D. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity | |
| 287. |
The ratio of the inertia force to the __________ is called Euler's number. |
| A. | Pressure force |
| B. | Elastic force |
| C. | Surface tension force |
| D. | Viscous force |
| Answer» A. Pressure force | |
| 288. |
Dimensions of surface tension are |
| A. | ML°T⁻² |
| B. | ML°T |
| C. | ML r² |
| D. | ML²T² |
| Answer» A. ML°T⁻² | |
| 289. |
Centrifugal pump is a |
| A. | Turbomachinery |
| B. | Flow regulating device |
| C. | Drafting device |
| D. | Intercooling device View Answer |
| Answer» A. Turbomachinery | |
| 290. |
Turbomachines work under |
| A. | Newtons first law |
| B. | Newtons second law |
| C. | Newtons third law |
| D. | Kepler’s law |
| Answer» B. Newtons second law | |
| 291. |
The main function of centrifugal pumps are to |
| A. | Transfer speed |
| B. | Transfer pressure |
| C. | Transfer temperature |
| D. | Transfer energy |
| Answer» D. Transfer energy | |
| 292. |
Turbines and compressors work with the gas, while centrifugal pump transfers energy. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 293. |
The inlet passage of water entry is controlled by |
| A. | Head race |
| B. | Gate |
| C. | Tail race |
| D. | Pump View Answer |
| Answer» B. Gate | |
| 294. |
Centrifugal pumps are used to transport |
| A. | Pressure |
| B. | Speed |
| C. | Power |
| D. | Fluid View Answer |
| Answer» D. Fluid View Answer | |
| 295. |
Centrifugal pumps transport fluids by converting |
| A. | Kinetic energy to hydrodynamic energy |
| B. | Hydrodynamic energy to kinetic energy |
| C. | Mechanical energy to kinetic energy |
| D. | Mechanical energy to Hydrodynamic energy View Answer |
| Answer» A. Kinetic energy to hydrodynamic energy | |
| 296. |
With the increase in load, Energy in the turbine |
| A. | Decreases |
| B. | Increases |
| C. | Remains same |
| D. | Independent View Answer |
| Answer» A. Decreases | |
| 297. |
When the balancing of the turbine is disturbed, we use |
| A. | Throttle governing |
| B. | Steam governing |
| C. | Nozzle governing |
| D. | Emergency governing View Answer |
| Answer» D. Emergency governing View Answer | |
| 298. |
The fluid coming into the centrifugal pump is accelerated by |
| A. | Throttle |
| B. | Impeller |
| C. | Nozzle |
| D. | Governor View Answer |
| Answer» B. Impeller | |
| 299. |
A gear pump uses |
| A. | Petrochemical pumps |
| B. | Meshing of gears |
| C. | Froth pumps |
| D. | Airlift pumps View Answer |
| Answer» B. Meshing of gears | |
| 300. |
The fundamental significance of all the turbomachinery is |
| A. | Conservation of momentum |
| B. | Conservation of mass |
| C. | Conservation of heat |
| D. | Conservation of speed View Answer |
| Answer» A. Conservation of momentum | |
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