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.
| 201. |
In an inclined pipe, the pressure difference at its two ends is due to |
| A. | sudden head drop at inlet |
| B. | exit head drop |
| C. | frictional loss head |
| D. | elevation head |
| Answer» E. | |
| 202. |
Falling drops of water become spheres due to |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity. |
| Answer» D. viscosity. | |
| 203. |
The main assumption of Bernoulli's equation is : |
| A. | The velocity of energy of liquid particle, across any cross-section of a pipe is uniform |
| B. | No external force except the gravity acts on the liquid |
| C. | There is no loss of energy of the liquid while flowing |
| D. | All the above. |
| Answer» E. | |
| 204. |
A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is |
| A. | 0.8 |
| B. | 0.9 |
| C. | 1 |
| D. | 1.1 |
| Answer» E. | |
| 205. |
The notch angle for maximum discharge over a triangular notch, is |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» D. 120¬∞ | |
| 206. |
The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as |
| A. | hydraulic gradient |
| B. | piezometric line |
| C. | pressure grade line |
| D. | hydraulic grade line |
| Answer» E. | |
| 207. |
Specific weight of liquid |
| A. | remains constant at every place |
| B. | does not remain constant at every place |
| C. | varies from place to place on the earth |
| D. | does not vary on any other planet. |
| Answer» E. | |
| 208. |
In a two dimensional flow if the components of the velocity are u = ax ; v = by, the point where no motion occurs, is known as |
| A. | critical point |
| B. | neutral point |
| C. | stagnation point |
| D. | stationary point |
| Answer» D. stationary point | |
| 209. |
For uniform flow in canals |
| A. | there is a balance between the frictional loss and drop in elevation of the channel |
| B. | bed and free water surfaces of a channel are parallel to each other |
| C. | bed of channel represents the hydraulic gradient |
| D. | all the above. |
| Answer» E. | |
| 210. |
The flow in a channel is said to be non-uniform, if |
| A. | free water surface of an open channel is not parallel to the bed of channel |
| B. | head needed to overcome frictional reistance is less than the drop in elevation of channel bed |
| C. | head needed to overcome frictional resistance is more than the drop in elevation of channel bed |
| D. | all the above. |
| Answer» E. | |
| 211. |
If the Mach number for a fluid flow is less than 1, the flow is |
| A. | sonic |
| B. | supersonic |
| C. | sub-sonic |
| D. | none of these. |
| Answer» D. none of these. | |
| 212. |
Cappoletti weir is a |
| A. | rectangular weir whose length is kept 3 times the height of the water above sill |
| B. | triangular weir whose notch angle is 90° |
| C. | trapezoidal weir, whose sides slope 1 horizontal to 2 verticals |
| D. | a combination of rectangular and triangular weirs. |
| Answer» D. a combination of rectangular and triangular weirs. | |
| 213. |
Kinematic viscosity of liquids by equation is determined by : |
| A. | Redwood viscometer |
| B. | Engler viscometer |
| C. | Saybolt universal viscometer |
| D. | None of these. |
| Answer» D. None of these. | |
| 214. |
The ratio of inertia force of a flowing fluid and the viscous force of the liquid is called : |
| A. | Renold's number |
| B. | Froude's number |
| C. | Euler's number |
| D. | Weber's number. |
| Answer» B. Froude's number | |
| 215. |
The height of water level in a tank above the centre of a circular hole 2.5 cm in diameter is 50 m. The velocity of water flowing through the hole, is |
| A. | 31.1 m/sec |
| B. | 31.2 m/sec |
| C. | 31.3 m/sec |
| D. | 31.4 m/sec. |
| Answer» D. 31.4 m/sec. | |
| 216. |
The mouth piece shown in the below figure is generally known as |
| A. | Internal mouth piece |
| B. | Re-entrant mouth piece |
| C. | Borda's mouth piece |
| D. | All the above. |
| Answer» E. | |
| 217. |
A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is |
| A. | 15 m |
| B. | 20 m |
| C. | 30 m |
| D. | 40 m |
| Answer» E. | |
| 218. |
On a flow net diagram, the distance between two consecutive steam lines at two successive sections are 1 cm and 0.5 cm respectively. If the velocity at the first section is 1 m/sec, the velocity at the second is |
| A. | 1.0 m/sec |
| B. | 0.5 m/sec |
| C. | 2.0 m/sec |
| D. | 2.5 m/sec |
| Answer» D. 2.5 m/sec | |
| 219. |
The differential equation dp/ρ + gdz + vdv = 0 for a fluid motion is suggested by |
| A. | Bernoulli |
| B. | Cauchy-Riemann |
| C. | Laplace |
| D. | Leonard Euler. |
| Answer» E. | |
| 220. |
A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is |
| A. | 459 kg |
| B. | 549 kg |
| C. | 945 kg |
| D. | 954 kg |
| Answer» E. | |
| 221. |
For an irrotational flow, the equation is given by |
| A. | Cauchy-Riemann |
| B. | Reynold |
| C. | Laplaces |
| D. | Bernoulli. |
| Answer» D. Bernoulli. | |
| 222. |
The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is |
| A. | 0.5 |
| B. | 1 |
| C. | l.5 |
| D. | 2 |
| Answer» E. | |
| 223. |
The best side slope for most economical trapezoidal section, is |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | None of these. |
| Answer» D. None of these. | |
| 224. |
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» B. difference in pressure at two points | |
| 225. |
For solving the problems is hydraulic engineering, the velocity used is |
| A. | velocity at the centre of pipe section |
| B. | average velocity of flow over a section |
| C. | mean of the velocities at the centre and that along the pipe surface |
| D. | none of these. |
| Answer» C. mean of the velocities at the centre and that along the pipe surface | |
| 226. |
Molecules of fluids get attracted due to |
| A. | capillarity action |
| B. | surface tension |
| C. | adhesion |
| D. | cohesion |
| Answer» D. cohesion | |
| 227. |
Total head of a liquid particle in motion is the sum of |
| A. | potential head and kinetic head |
| B. | kinetic head and pressure head |
| C. | potential head and pressure head |
| D. | potential head, kinetic head and pressure head. |
| Answer» E. | |
| 228. |
Dimensions of the dynamic viscosity (μ) are |
| A. | MLT-2 |
| B. | M-1L-1T-1 |
| C. | ML-1T-2 |
| D. | ML-1T-1. |
| Answer» E. | |
| 229. |
The equation for the viscosity, is suggested |
| A. | Bernoulli |
| B. | Newton |
| C. | Chezy |
| D. | Bezin |
| Answer» C. Chezy | |
| 230. |
Gauge pressure is |
| A. | absolute pressure - atmospheric pressure |
| B. | absolute pressure + atmospheric pressure |
| C. | atmospheric pressure - absolute pressure |
| D. | none of these. |
| Answer» B. absolute pressure + atmospheric pressure | |
| 231. |
A rise or fall of liquid in a glass tube of a very small diameter when dipped is |
| A. | directly proportional to the force per unit length of periphery |
| B. | direcly proportional to the sine of the angle of contact |
| C. | directly proportional to the specific weight of liquid |
| D. | inversely proportional to the diameter of the glass tube. |
| Answer» D. inversely proportional to the diameter of the glass tube. | |
| 232. |
Manning's formula is used for |
| A. | flow in open channels |
| B. | head loss due to friction in open channels |
| C. | head loss due to friction in pipes flowing full |
| D. | flow in pipes. |
| Answer» C. head loss due to friction in pipes flowing full | |
| 233. |
The shape of fire hose nozzle is generally kept |
| A. | divergent |
| B. | convergent |
| C. | convergent divergent |
| D. | cylindrical. |
| Answer» C. convergent divergent | |
| 234. |
The ratio of frictional factor and coefficient of friction used in general equation for a head loss in a pipe, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 235. |
If H is height of the liquid above the sill, the effect of end contractions, according to Francis formula, is |
| A. | 0.1 H |
| B. | 0.2 H |
| C. | 0.3 H |
| D. | 0.4 H |
| Answer» B. 0.2 H | |
| 236. |
Euler's equation for the motion of liquids assumes that |
| A. | fluid is viscous |
| B. | fluid is homogeneous and incompressible |
| C. | velocity of flow is non-uniform over the section |
| D. | flow is unsteady along the stream line. |
| Answer» C. velocity of flow is non-uniform over the section | |
| 237. |
If H is the difference of liquid levels on two sides of an orifice (width b, depth d), the discharge through the orifice will be |
| A. | Cdbd22gH |
| B. | Cdb2d2gH |
| C. | Cdbd2gh |
| D. | Cdbd.2g H1/2. |
| Answer» D. Cdbd.2g H1/2. | |
| 238. |
The discharge over a Cipolletti weir of length 2.185 m when the head over the weir is 1 m, is |
| A. | 2.0 m3 |
| B. | 2.5 m3 |
| C. | 3.0 m3 |
| D. | 4.0 m3. |
| Answer» E. | |
| 239. |
The length of hydraulic jump is roughly |
| A. | 2 to 3 times its height |
| B. | 3 to 5 times its height |
| C. | 5 to 7 times its height |
| D. | None of these. |
| Answer» D. None of these. | |
| 240. |
Pick up the correct statement regarding convergent divergent mouth piece from the following : |
| A. | It converges upto Venacontracta and then diverges |
| B. | In this mouth piece there is no loss of energy due to sudden enlargement |
| C. | The coefficient of discharge is unity |
| D. | All the above. |
| Answer» E. | |
| 241. |
The dimensionless parameter not applicable to flowing liquids, is |
| A. | Reynold number |
| B. | Weber number |
| C. | Pressure coefficient |
| D. | Kinematic viscosity |
| Answer» E. | |
| 242. |
The most efficient channel section, is |
| A. | semi-circular |
| B. | rectangular |
| C. | triangular |
| D. | half hexagon in the form of trapezoid. |
| Answer» E. | |
| 243. |
The ratio of the maximum height to which a jet inclined through θ rises to its total horizontal span is |
| A. | sin θ |
| B. | cos θ |
| C. | tan θ |
| D. | cot θ. |
| Answer» D. cot Œ∏. | |
| 244. |
An orifice is called a large orifice if water head, is |
| A. | twice the diameter of the orifice |
| B. | thrice the diameter of the orifice |
| C. | four times the diameter of the orifice |
| D. | five times the diameter of the orifice. |
| Answer» E. | |
| 245. |
Total pressure on the top of a closed cylindrical vessesl completely filled with liquid, is directly proportional to |
| A. | radius |
| B. | (radius)2 |
| C. | (radius)3 |
| D. | (radius)4 |
| Answer» E. | |
| 246. |
The flow is called rotational if its velocity normal to the plane of area is equal to |
| A. | angular velocity vector |
| B. | twice the angular velocity vector |
| C. | thrice the angular velocity vector |
| D. | none of these. |
| Answer» C. thrice the angular velocity vector | |
| 247. |
The pressure rise due to water hammer depends upon |
| A. | the velocity of flow of water in the pipe |
| B. | the length of pipe |
| C. | time taken to close the valve |
| D. | the elasticity of the pipe material |
| Answer» E. | |
| 248. |
The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is |
| A. | 1.0 m |
| B. | 1.5 m |
| C. | 2.0 m |
| D. | 2.5 m. |
| Answer» D. 2.5 m. | |
| 249. |
Pick up the incorrect statement from to following regarding triangular notch : |
| A. | For measuring low discharge, it gives more accurate result |
| B. | Only one reading (i.e. H) is required for computation of discharge |
| C. | Ventilation is necessary |
| D. | None of these. |
| Answer» D. None of these. | |
| 250. |
Power transmitted through a pipe is maximum when friction head loss, is |
| A. | one-half of the total head supplied |
| B. | one-third of the total head supplied |
| C. | one-fouth of the total head supplied |
| D. | equal to the total head supplied. |
| Answer» C. one-fouth of the total head supplied | |