MCQOPTIONS
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MCQOPTIONS
This section includes 342 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
The velocity of the fluid particle at the centre of the pipe section, is |
| A. | minimum |
| B. | maximum |
| C. | equal throughout |
| D. | none of these. |
| Answer» C. equal throughout | |
| 252. |
In flow, the liquid particles may possess |
| A. | potential energy |
| B. | kinetic energy |
| C. | pressure energy |
| D. | all the above. |
| Answer» E. | |
| 253. |
Shear stress is directly proportional to |
| A. | the velocity |
| B. | the shear strain |
| C. | the viscosity |
| D. | the velocity. |
| Answer» C. the viscosity | |
| 254. |
If u, v, w are the components of the velocity v of a moving particle, the equation represents |
| A. | one diamensional flow |
| B. | two dimensional flow |
| C. | three dimensional flow |
| D. | none of these. |
| Answer» D. none of these. | |
| 255. |
A floating body attains stable equilibrium if its metacentre is |
| A. | at the centroid |
| B. | above the centroid |
| C. | below the centroid |
| D. | anywhere. |
| Answer» C. below the centroid | |
| 256. |
The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to : |
| A. | square root of the bulk modulus of elasticity of water |
| B. | bulk modulus of elasticity of water |
| C. | specific weight of water |
| D. | none of these. |
| Answer» B. bulk modulus of elasticity of water | |
| 257. |
A stepped notch is a combination of |
| A. | rectangular notches of different sizes |
| B. | triangular notches of different sizes |
| C. | rectangular and triangular notches |
| D. | all the above. |
| Answer» B. triangular notches of different sizes | |
| 258. |
To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be |
| A. | 2.48 m |
| B. | 2.49 m |
| C. | 2.50 m |
| D. | 2.51 m. |
| Answer» C. 2.50 m | |
| 259. |
In case of laminar flow through a circular pipe, |
| A. | momentum correction factor is 1.33 |
| B. | energy correction factor is 2.00 |
| C. | both (a) and (b) |
| D. | Neither (a) nor (b). |
| Answer» D. Neither (a) nor (b). | |
| 260. |
If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is |
| A. | 400 H.P. |
| B. | 450 H.P. |
| C. | 500 H.P. |
| D. | 550 H.P. |
| Answer» D. 550 H.P. | |
| 261. |
In pipe lines, a surge tank is provided |
| A. | to relieve the pressure due to water hammer |
| B. | to provide additional water head |
| C. | to overflow the pipe line when suddenly closed |
| D. | to remove the frictional loss in pipe. |
| Answer» B. to provide additional water head | |
| 262. |
Hydraulic radius is equal to |
| A. | area divided by the square of wetted perimeter |
| B. | area divided by wetted perimeter |
| C. | wetted perimeter divided by area |
| D. | square root of the area. |
| Answer» C. wetted perimeter divided by area | |
| 263. |
The dimensions MLT-2 refers to |
| A. | specific weight |
| B. | force |
| C. | discharge |
| D. | none of these. |
| Answer» C. discharge | |
| 264. |
If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing |
| A. | Reynold number |
| B. | Froude number |
| C. | Weber number |
| D. | Mach number. |
| Answer» C. Weber number | |
| 265. |
An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to |
| A. | 0.0125 |
| B. | 0.015 |
| C. | 0.0175 |
| D. | 0.0225 |
| Answer» C. 0.0175 | |
| 266. |
Differential manometers are used to measure |
| A. | pressure in water channels, pipes, etc. |
| B. | difference in pressure at two points |
| C. | atmospheric pressure |
| D. | very low pressure. |
| Answer» C. atmospheric pressure | |
| 267. |
A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water |
| A. | rises on the front side of the tank |
| B. | falls on the back side of the tank |
| C. | remains the same at both sides of the tank |
| D. | rises on the back side and falls on the front side |
| Answer» E. | |
| 268. |
The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is |
| A. | water hammer |
| B. | hydraulic jump |
| C. | critical discharge |
| D. | none of these. |
| Answer» C. critical discharge | |
| 269. |
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at A is |
| A. | 14,137 kgf |
| B. | 5,863 kgf |
| C. | 20,000 kgf |
| D. | 18,000 kgf. |
| Answer» C. 20,000 kgf | |
| 270. |
In C.G.S. system the unit of visocity is |
| A. | dyne |
| B. | joule |
| C. | poise |
| D. | Newton |
| Answer» D. Newton | |
| 271. |
A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec2. The ratio of the pressures at its bottom when it is moving vertically up and down, is |
| A. | 2 |
| B. | 3 |
| C. | 43497 |
| D. | 43525 |
| Answer» C. 43497 | |
| 272. |
A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is |
| A. | less than 12.2 m of the water |
| B. | more than 12.2 m of the water |
| C. | equal of 12.2 m of water |
| D. | none of these. |
| Answer» C. equal of 12.2 m of water | |
| 273. |
Centre of buoyancy is |
| A. | centroid of the floating body |
| B. | centroid of the fluid displaced |
| C. | centre of pressure of the displaced liquid |
| D. | none of these. |
| Answer» C. centre of pressure of the displaced liquid | |
| 274. |
Chezy's formula is used to determine |
| A. | head loss due to friction in pipe |
| B. | velocity of flow in pipe |
| C. | velocity of flow in open channels |
| D. | none of these. |
| Answer» D. none of these. | |
| 275. |
The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called |
| A. | Euler number |
| B. | Frode number |
| C. | Reynold number |
| D. | Weber number. |
| Answer» C. Reynold number | |
| 276. |
An ideal flow of a liquid obeys |
| A. | Continuity equation |
| B. | Newton's law of viscosity |
| C. | Newton's second law of motion |
| D. | dynamic viscosity law, |
| Answer» B. Newton's law of viscosity | |
| 277. |
If jet of water coming out from a nozzle with a velocity 9.81 m/s, the angle of elevation being 30°, the time to reach the highest point is |
| A. | 0.25 s |
| B. | 0.50 s |
| C. | 1.0 s |
| D. | 1.5 s. |
| Answer» C. 1.0 s | |
| 278. |
The dimensional formula of force is |
| A. | MLT-2 |
| B. | M-1LT2 |
| C. | ML-2T |
| D. | M-1L2T-2 |
| Answer» B. M-1LT2 | |
| 279. |
Orifice-meter is used to measure |
| A. | pressure at the point |
| B. | discharge |
| C. | average speed |
| D. | velocity. |
| Answer» C. average speed | |
| 280. |
A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is |
| A. | 2.4 cm |
| B. | 2.5 cm |
| C. | 2.6 cm |
| D. | 2.7 cm. |
| Answer» C. 2.6 cm | |
| 281. |
For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is |
| A. | Froude number |
| B. | Weber number |
| C. | Reynold number |
| D. | Mach number. |
| Answer» C. Reynold number | |
| 282. |
Capillary rise of water is |
| A. | directly proportional to surface tension |
| B. | inversely proportional to water density |
| C. | inversely proportional to diameter of the tube |
| D. | All of these. |
| Answer» E. | |
| 283. |
Non-over flow double curvature concrete arch, is provided in |
| A. | Bhakra dam |
| B. | Hirakund dam |
| C. | Nagarjuna Sagar dam |
| D. | Idukki dam. |
| Answer» E. | |
| 284. |
The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is |
| A. | π |
| B. | 2π |
| C. | 3π |
| D. | 4π |
| Answer» D. 4œÄ | |
| 285. |
Flow of water in pipes of diameter more than 3 metres, can be measured by |
| A. | pitot tube |
| B. | venturimeter |
| C. | orifice plate |
| D. | rotameter. |
| Answer» E. | |
| 286. |
Maximum efficiency of transmission of power through a pipe, is |
| A. | 0.25 |
| B. | 0.333 |
| C. | 0.5 |
| D. | 66.67%. |
| Answer» E. | |
| 287. |
When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure |
| A. | increases linearly to its radial distance |
| B. | varies inversely as the altitude along any vertical line |
| C. | varies as the square of the radial distance |
| D. | decreases as the square of the radial distance |
| Answer» D. decreases as the square of the radial distance | |
| 288. |
Uniform flow is said to occur when |
| A. | size and shape of the cross-section in a particular length remain constant |
| B. | size and shape of the cross-section change along a length |
| C. | frictional loss in the particular length of the channel will the more than the drop in its elevation |
| D. | frictional loss in the particular length of the channel, will be less than the drop in elevation. |
| Answer» B. size and shape of the cross-section change along a length | |
| 289. |
An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be |
| A. | greater than static pressure |
| B. | equal to static pressure |
| C. | lesser than static pressure |
| D. | none of these. |
| Answer» D. none of these. | |
| 290. |
The width of a weir with end contraction, is |
| A. | equal to the width of the channel |
| B. | less than the width of the channel |
| C. | half the width of the channel |
| D. | none of these. |
| Answer» C. half the width of the channel | |
| 291. |
For maximum horse power of a nozzle, the head supplied must be equal to |
| A. | head loss in the pipe due to friction |
| B. | twice the head loss in the pipe due to friction |
| C. | thrice the head loss in the pipe due to friction |
| D. | four times the head loss in the pipe due to friction. |
| Answer» D. four times the head loss in the pipe due to friction. | |
| 292. |
If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its |
| A. | specific weight |
| B. | specific mass |
| C. | specific gravity |
| D. | none of these. |
| Answer» D. none of these. | |
| 293. |
An independent mass of a fluid does not posses |
| A. | elevation energy |
| B. | kinetic energy |
| C. | pressure energy |
| D. | none of these. |
| Answer» D. none of these. | |
| 294. |
An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to |
| A. | 0.0125 |
| B. | 0.015 |
| C. | 2.0%. |
| D. | 0.025 |
| Answer» E. | |
| 295. |
If a pitot tube is placed with its nose facing down stream, the liquid |
| A. | does not rise in the tube |
| B. | rises in the tube to a height |
| C. | falls in the tube to a depth |
| D. | none of these. |
| Answer» D. none of these. | |
| 296. |
Unit of kinematic viscosity is |
| A. | m2/sec |
| B. | Newton sec/m2 |
| C. | Newton sec/m3 |
| D. | Kg sec/m2. |
| Answer» B. Newton sec/m2 | |
| 297. |
An ideal fluid |
| A. | is frictionless and incompressible |
| B. | obeys Newton's law of velocity |
| C. | is similar to gas |
| D. | is very viscous. |
| Answer» B. obeys Newton's law of velocity | |
| 298. |
In C.G.S. system the units of kinematic viscosity, is |
| A. | stoke |
| B. | poise |
| C. | Newton |
| D. | none of these. |
| Answer» B. poise | |
| 299. |
The Empirical formula for discharge over large rectangular weirs, is known as |
| A. | Francis formula |
| B. | Bazin formula |
| C. | Rehbook formula |
| D. | Kutter's formula. |
| Answer» C. Rehbook formula | |
| 300. |
For the most economical trapezoidal open channel, |
| A. | half of the top width must be equal to one of the sloping sides |
| B. | the hydraulic mean depth must be equal to half the depth of flow |
| C. | the semicircle drawn with top width as diameter must touch the three sides of the channel |
| D. | All of these. |
| Answer» E. | |