McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering , Mechanical Engineering .
Chapters
| 301. |
A stationary body immersed in a river has a maximum pressure of 69 Kpa exerted on it at a distance of 5.4 m below the free surface. What velocity of river could be expected ? |
| A. | 9 m/sec |
| B. | 5.4 m/sec |
| C. | 3.82 m/sec |
| D. | 5.67 m/s |
| E. | None of the above |
| Answer» D. 5.67 m/s | |
| 302. |
In reaction turbine the draft tube is used |
| A. | To increase the effective head |
| B. | To prevent air from entering |
| C. | To reconvert kinetic energy to flow energy by a gradual expansion of the flow cross-section |
| D. | To transport water to downstream without eddies |
| E. | To run the turbine full |
| Answer» C. To reconvert kinetic energy to flow energy by a gradual expansion of the flow cross-section | |
| 303. |
Air vessels in a reciprocating pump is |
| A. | Fitted in the suction line |
| B. | Fitted in the delivery line |
| C. | A cast iron chamber having an opening at the base |
| D. | A, B and C above together |
| E. | None of the above |
| Answer» D. A, B and C above together | |
| 304. |
If a water tank partially filled with water is being carried on a truck with a constant horizontal acceleration, the level of liquid will |
| A. | Rise on the front side of the tank |
| B. | Rise on the back side of the tank and fall on front |
| C. | Fall on the front side of the tank |
| D. | Front side fluctuate considerably |
| E. | Fall on the back side of the tank and rise on front |
| Answer» B. Rise on the back side of the tank and fall on front | |
| 305. |
The pressure centre is |
| A. | A point on the line of action of the resultant force |
| B. | At the centroid of the submerged area |
| C. | Independent of the orientation of the area |
| D. | Always above the centroid of area |
| E. | The centroid of the pressure prism |
| Answer» A. A point on the line of action of the resultant force | |
| 306. |
An ideal fluid is |
| A. | One which flows through pipes with least friction |
| B. | One which obeys Newton's law of viscosity |
| C. | One which satisfies continuity equation |
| D. | Similar to a perfect gas |
| E. | Frictionless and incompressible |
| Answer» E. Frictionless and incompressible | |
| 307. |
The general energy equation is applicable to |
| A. | Turbulent flow |
| B. | Unsteady flow |
| C. | Laminar flow |
| D. | Steady flow |
| E. | Non-uniform flow |
| Answer» D. Steady flow | |
| 308. |
In a venturimeter |
| A. | Length of divergent cone is equal to the length of conergent cone |
| B. | Length of divergent cone is half that of convergent cone |
| C. | Divergent cone is kept shorter than convergent cone |
| D. | Divergent cone is kept longer than the convergent cone |
| E. | None of the above |
| Answer» B. Length of divergent cone is half that of convergent cone | |
| 309. |
The flow in venturi flume takes place at |
| A. | Atmospheric pressure |
| B. | Vacuum |
| C. | High pressure |
| D. | Varying pressure |
| E. | None of the above |
| Answer» A. Atmospheric pressure | |
| 310. |
Chemically inact relatively unstable blocks, large or small with three or more sets of joints and seams are known as |
| A. | Moderately jointed rocks |
| B. | Crushed rocks |
| C. | Schistos rocks |
| D. | Chemical rocks |
| E. | Block or seamy rocks |
| Answer» E. Block or seamy rocks | |
| 311. |
A Founeyron turbine is |
| A. | Outward flow reaction turbine |
| B. | Inward flow reaction turbine |
| C. | Outward flow impulse turbine |
| D. | Inward flow impulse turbine |
| E. | None of the above |
| Answer» A. Outward flow reaction turbine | |
| 312. |
Kinematic similarity between model and prototype means |
| A. | Vitrified clay. |
| B. | The similarity of shape |
| C. | The similarity of discharge |
| D. | The similarity of forces |
| E. | The similarity of motion |
| Answer» D. The similarity of forces | |
| 313. |
In order to keep out debris and other materials carried by water which are likely to damage turbine, provision is made by |
| A. | Ensign valve |
| B. | Jet flow gates |
| C. | Trash racks |
| D. | Radial gates |
| E. | Trunions |
| Answer» C. Trash racks | |
| 314. |
The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as |
| A. | x1/2 |
| B. | x3/5 |
| C. | x2 |
| D. | x |
| E. | x4/5 |
| Answer» A. x1/2 | |
| 315. |
Anchor blocks are provided to hold the pipe line so as to |
| A. | Prevent the pipe line sliding down the hill |
| B. | Control the direction of expansion |
| C. | Resist the unbalanced hydrostatic forces at a change of direction of the pipe line |
| D. | Prevent movement of the pipe line on account of vibration or water hammer pressures |
| E. | All of the above |
| Answer» E. All of the above | |
| 316. |
The magnitude of water hammer depends on |
| A. | The length of pipeline |
| B. | The speed at which the valve is closed |
| C. | To elastic properties of the liquid flowing through the pipe |
| D. | The elastic properties of the pipe material |
| E. | All of the above |
| Answer» E. All of the above | |
| 317. |
When the relationship between Reynolds number and the friction factor is represented by a straight line the flow is said to be |
| A. | laminar flow |
| B. | vortex flow |
| D. | turbulent flow |
| E. | isentropic flow |
| Answer» A. laminar flow | |
| 318. |
Buoyant force is |
| A. | The resultant force on a body due to the fluid surrounding it |
| B. | A non-vertical force on symmetrical bodies |
| C. | Equal to the volume of liquid displaced |
| D. | The resultant force acting on a floating body |
| E. | The force necessary to maintain equilibrium of a submerged body |
| Answer» A. The resultant force on a body due to the fluid surrounding it | |
| 319. |
The hydraulic radius is given by |
| A. | Wetted perimeter divided by area |
| B. | Square root of area |
| C. | Area divided by wetted perimeter |
| D. | Area divided by square of wetted perimeter |
| E. | None of these answers |
| Answer» C. Area divided by wetted perimeter | |
| 320. |
Mouthpieces are used to measure |
| A. | pressure |
| B. | rate of flow |
| C. | frictionless |
| D. | viscosity |
| E. | velocity |
| Answer» B. rate of flow | |
| 321. |
In Red wood viscometer |
| A. | Absolute value of viscosity is determined |
| B. | The fluid discharges through orifice with negligible velocity |
| C. | Comparison of viscosity is done |
| D. | Part of the head of fluid is utilised in overcoming friction |
| E. | The fluid should rapidly flow out of the orifice |
| Answer» C. Comparison of viscosity is done | |
| 322. |
Steady flow occurs when |
| A. | There are no obstructions on the path of flow |
| B. | Conditions do not change withtime at any point |
| C. | The velocity does not change |
| D. | The pressure does not change along the flow |
| E. | Conditions change gradually with time |
| Answer» B. Conditions do not change withtime at any point | |
| 323. |
As the temperature increases, the viscosity of a gas |
| B. | increases, increases |
| C. | decreases, decreases |
| D. | increases, decreases |
| E. | decreases, increases |
| Answer» D. increases, decreases | |
| 324. |
A cylinder is kept on a horizontal boundary past which an ideal fluid flows perpendicular to cylinder axis. It will then experience |
| A. | Lift force in vertically downward direction |
| B. | No lift force |
| C. | Some lift force |
| D. | Lift force depends on velocity of flow and mass of cylinder and its contents |
| E. | Lift force in vertically upward direction |
| Answer» B. No lift force | |
| 325. |
Which one of the following is not a disadvantage due to a Buttress dam? |
| A. | Problems arising out of large number of joints in the dam |
| B. | Significance of volume changes of thin members |
| C. | The structure being self-sealing, it is not sensitive to accidental rise in water level above the designed full supply level |
| D. | Bearing stress of the foundtions are higher |
| E. | Overflow arrangements |
| Answer» C. The structure being self-sealing, it is not sensitive to accidental rise in water level above the designed full supply level | |
| 326. |
The pressure inside a 4 cm dia hose is 700 kPa. If the water exits through 1 2 cm dia. Nozzle what velocity in m/s can be expected inside the hose? |
| A. | 10.5 |
| B. | 9.7 |
| C. | 16.3 |
| D. | 20.4 |
| E. | 12.4 |
| Answer» B. 9.7 | |
| 327. |
Which of the following is the result of the formation of a region of low pressure developed on the downstream side due to separation of flow? |
| A. | Vortex street |
| B. | Wakes |
| C. | Cavities |
| E. | Holes |
| Answer» B. Wakes | |
| 328. |
Force on a flat stationary plate is |
| A. | Velocity of jet before impact - velocity after impact |
| B. | Difference in velocities of jet in the direction normal to plate |
| C. | Mass of water x (difference in velocities of jet) |
| D. | Mass of striking water x (velocity before impact in the direction normal to plate-velocity fter impact in the direction normal to plate). |
| E. | None of the above |
| Answer» D. Mass of striking water x (velocity before impact in the direction normal to plate-velocity fter impact in the direction normal to plate). | |
| 329. |
Viscosity will be the most important property in which of the following case |
| A. | Travel of a bullet through air |
| B. | Formation of soap bubbles |
| C. | Flow of castor oil through a pipe. |
| D. | Water jet issuing from a fire hose |
| E. | 1.25 |
| Answer» C. Flow of castor oil through a pipe. | |
| 330. |
The flow of a fluid in a pipe takes place from |
| A. | higher level to lower level |
| B. | small end to large end |
| C. | higher energy to lower energy |
| D. | higher pressure to lower pressure |
| E. | lower pressure to higher pressure |
| Answer» C. higher energy to lower energy | |
| 331. |
The head over a 90? V-notch weir increases from 0.15 m to 0.3 m. The ratio of the new discharge to the original discharge is |
| A. | 1.25 |
| B. | 4 |
| C. | 5.657 |
| D. | 2 |
| E. | 1.414 |
| Answer» C. 5.657 | |
| 332. |
The portion of the power canal which extends from the power house to the recepient water course, is known as |
| A. | Tail race |
| B. | Discharge channel |
| C. | Exhaust |
| D. | Tail surge channel |
| E. | None of the above |
| Answer» A. Tail race | |
| 333. |
Nagarjuna Sugar dam has been constucted on river |
| A. | Mabanadi |
| B. | Cauvery |
| C. | Krishna |
| D. | Kali |
| E. | Periyar |
| Answer» C. Krishna | |
| 334. |
Which is higher head |
| A. | 33 inch Hg |
| B. | 31.6 ft water |
| C. | 14.1 psi |
| D. | 1.013 kg/cm2 |
| E. | 75.6 cm of Hg |
| Answer» A. 33 inch Hg | |
| 335. |
The specific speed for axial flow turbine varies from |
| A. | 0 - 45 |
| B. | 10 - 100 |
| C. | 80 - 200 |
| D. | 200 - 300 |
| E. | None of the above |
| Answer» C. 80 - 200 | |
| 336. |
1 Kilo-Pascal is the same as |
| A. | 1000 N/cm2 |
| B. | 1000 N/m2 |
| D. | 1000 n/mm2 |
| E. | 1000 N/cm |
| Answer» B. 1000 N/m2 | |
| 337. |
When a liquid rotates at a angular velocity above a vertical axis as a rigid body, the pressure intensity varies |
| A. | inversely with radial distance |
| B. | directly with radial distance |
| C. | More than 20? |
| D. | Directly with square of the radial distance |
| E. | inversely with the square of radial distance |
| Answer» D. Directly with square of the radial distance | |
| 338. |
Specific speed (fps) = k x specific speed (metric where value of k is (for turbines) |
| A. | 8.91 |
| B. | 1 |
| C. | 4.45 |
| D. | 2 |
| E. | 9.81 |
| Answer» C. 4.45 | |
| 339. |
Water at 20? C will rise, in a clean 1 mm dia. Glass tube, a distance, in cm, of |
| A. | 3 |
| B. | 5 |
| C. | 1 |
| D. | 4 |
| E. | 2 |
| Answer» A. 3 | |
| 340. |
Viscosity will be the most important property in which of the following case |
| B. | Formation of soap bubbles |
| C. | Water jet issuing from a fire hose |
| D. | Flow of castor oil through a tube |
| E. | Travel of a bullet through air |
| Answer» D. Flow of castor oil through a tube | |
| 341. |
When the shear stress acting on a fluid is removed |
| A. | the body regains its original shape and position immediately |
| B. | the body regains its original shape and position slowly |
| C. | the body regains its original shape but remains in the new position |
| D. | the body retains its new shape and position |
| Answer» D. the body retains its new shape and position | |
| 342. |
Which mouthpiece is having maximum coefficient of discharge? |
| A. | External mouthpiece |
| B. | Convergent-Divergent mothpiece |
| C. | Internal mouthpiece |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Convergent-Divergent mothpiece | |
| 343. |
Under which two of the following regimes would the assumption of a continuum be reasonable (1) Free molecule flow (2) Gas dynamics (3) Slip flow (4) Complete vacuum (5) Liquid flow |
| A. | 3,5 |
| B. | 1,5. |
| C. | 1,2 |
| D. | 2,3 |
| E. | 1,4 |
| Answer» A. 3,5 | |
| 344. |
Drag force is not a function of |
| A. | 1.25 |
| B. | projected area of the body |
| C. | velocity of the body |
| D. | mass density of the fluid |
| E. | mass density of the body |
| Answer» E. mass density of the body | |
| 345. |
The shear stress velocity gradient relation of the Newtonian fluids is |
| A. | There is no such relation |
| B. | Hyperbolic |
| C. | Linear |
| D. | Involutic |
| E. | Parabolic |
| Answer» C. Linear | |
| 346. |
A hydrometer is used to determine |
| A. | Specific gravity of liquids |
| B. | Buoyancy force |
| C. | Viscosity of liquids |
| D. | Surface tension |
| E. | Relative humidity |
| Answer» A. Specific gravity of liquids | |
| 347. |
Ogee is |
| A. | overfall of a spillway in the shape of double or S-curve which is convex at the top and concave at the bottom |
| B. | the channel between the silt extractor and the river through which the escapage water is discharged |
| C. | the channel conducting water away from a water wheel |
| D. | none of the above |
| Answer» A. overfall of a spillway in the shape of double or S-curve which is convex at the top and concave at the bottom | |
| 348. |
A piece of metal of specific gravity 3.4 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury |
| A. | 0.75 |
| B. | Full |
| C. | 0.25 |
| D. | 0.5 |
| E. | 0.9 |
| Answer» B. Full | |
| 349. |
An ideal fluid is |
| A. | Frictionless and incompressible |
| B. | One which obeys Newton's law of viscosity |
| C. | Very viscous |
| D. | A useful assumption in problems in conduit flow |
| E. | None of these answers |
| Answer» A. Frictionless and incompressible | |
| 350. |
The parameters with determine the friction factor of turbulent flow in a rough pipe are |
| A. | expands until it fills its space |
| B. | Mach number and relative roughness |
| C. | Reynolds number and relative roughness |
| D. | Froude number and relative roughness |
| E. | Froude number and Mach number |
| Answer» C. Reynolds number and relative roughness | |
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