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.
| 151. |
Bernoulli's equation assumes that |
| A. | fluid is non-viscous |
| B. | fluid is homogeneous |
| C. | flow is steady |
| D. | flow is along the stream line |
| Answer» E. | |
| 152. |
The discharg formula Q = Cd 2gH x A is used for rectangular |
| A. | small orifices only |
| B. | large orifices only |
| C. | small and large orifices only |
| D. | for all types of orifices. |
| Answer» C. small and large orifices only | |
| 153. |
Atmospheric pressure is equal to water column head of |
| A. | 9.81 m |
| B. | 5.0 m |
| C. | 10.30 m |
| D. | 7.5 m. |
| Answer» D. 7.5 m. | |
| 154. |
From a nozzle exposed to atmosphere, the liquid jet traverses |
| A. | a straight line |
| B. | a circular path |
| C. | an elliptical path |
| D. | a parabolic path. |
| Answer» E. | |
| 155. |
The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m3/s. The head over the mouth piece is |
| A. | 2 m |
| B. | 2.5 m |
| C. | 3.0 m |
| D. | 4.0 m. |
| Answer» E. | |
| 156. |
Hydraulic ram is a device |
| A. | for lifting water without an electric motor |
| B. | for accelerating water flow |
| C. | for lifting heavy loads |
| D. | none of these. |
| Answer» B. for accelerating water flow | |
| 157. |
Equation of continuity of fluids is applicable only if |
| A. | flow is steady |
| B. | flow is compressive |
| C. | flow is one dimensional |
| D. | velocity is uniform over the cross-sections |
| Answer» E. | |
| 158. |
To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is |
| A. | 1/4 to 1/8 |
| B. | 1/3 to 1/2 |
| C. | 1/2 to 3/4. |
| D. | none of these. |
| Answer» C. 1/2 to 3/4. | |
| 159. |
In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to |
| A. | diameter of the orifice |
| B. | one-fourth the diameter of the orifice |
| C. | one-third the diameter of the orifice |
| D. | two-third the diameter of the orifice |
| Answer» C. one-third the diameter of the orifice | |
| 160. |
If Cv, Cc, Cd and Cr are the hydraulic coefficients of an orifice, then |
| A. | Cd = Cc . Cv |
| B. | Cr = 1 + Cv2/Cd |
| C. | Cv = Cc + Cd |
| D. | Cc = Cv/Cd |
| Answer» B. Cr = 1 + Cv2/Cd | |
| 161. |
The flow in open channel is laminar if the Reynold number is |
| A. | less than 500 |
| B. | more than 500 |
| C. | 1000 |
| D. | none of these. |
| Answer» B. more than 500 | |
| 162. |
The centre of pressure of a vertical plane immersed in a liquid is at |
| A. | centre of higher edge |
| B. | centre of lower edge |
| C. | centroid of the area |
| D. | none of these. |
| Answer» E. | |
| 163. |
The following is not a laminar flow |
| A. | Flow of oil in measuring instruments |
| B. | Flow in beds in ground water |
| C. | Rise of water in plants through roots |
| D. | Flow of blood in the arteries of human body |
| Answer» E. | |
| 164. |
For a most economical trapezoidal open channel, the half of the top width must be equal to |
| A. | the bed width |
| B. | one sloping side |
| C. | the depth of flow |
| D. | None of these. |
| Answer» C. the depth of flow | |
| 165. |
The velocity distribution of viscous fluid through a circular/pipe is : |
| A. | hyperbolic |
| B. | circular |
| C. | parabolic |
| D. | elliptical. |
| Answer» D. elliptical. | |
| 166. |
When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as |
| A. | free vortex |
| B. | forced vortex |
| C. | non-potential vortex |
| D. | rotational vortex. |
| Answer» B. forced vortex | |
| 167. |
The flow in which each liquid particle has a definite path and the paths of adjacent particles do not cross each other, is called |
| A. | stream line flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow. |
| Answer» B. uniform flow | |
| 168. |
The metacentric height of a body equals the distance between |
| A. | the centre of gravity and centre of buoyancy |
| B. | the metacentre and centre of gravity |
| C. | the centre of buoyancy and metacentre |
| D. | none of these. |
| Answer» C. the centre of buoyancy and metacentre | |
| 169. |
An ideal fluid is |
| A. | incompressible |
| B. | compressible |
| C. | compressible and non-viscous |
| D. | slightly affected by surface torque. |
| Answer» D. slightly affected by surface torque. | |
| 170. |
For critical depth of flow of water in open channels, fc the specific energy must be : |
| A. | minimum |
| B. | maximum |
| C. | average of maximum and minimum |
| D. | None of these. |
| Answer» B. maximum | |
| 171. |
To measure very low pressure, we use |
| A. | barometers |
| B. | piezometers |
| C. | manometers |
| D. | differential manometers. |
| Answer» D. differential manometers. | |
| 172. |
The discharge through an internal mouth piece is more if its length is |
| A. | < diameter |
| B. | < diameter |
| C. | ‚â• diameter |
| D. | none of these. |
| Answer» D. none of these. | |
| 173. |
To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than |
| A. | 2.4 m |
| B. | 6.4 m |
| C. | 10.0 m |
| D. | 5.0 m. |
| Answer» C. 10.0 m | |
| 174. |
In an open tube, free surface of mercury remains |
| A. | horizontal |
| B. | curved upwards |
| C. | curved downwards |
| D. | none of these. |
| Answer» D. none of these. | |
| 175. |
Hydraulic grade line |
| A. | remains above the centre line of conduit |
| B. | remains below the centre line of conduit |
| C. | remains parallel to the centre line of conduit |
| D. | may be above or below the centre line of conduit. |
| Answer» E. | |
| 176. |
A non-uniform steady flow is through |
| A. | a long tube at a decreasing rate |
| B. | an expanding tube at constant rate |
| C. | an expanding tube at increasing rate |
| D. | a long pipe at increasing rate. |
| Answer» C. an expanding tube at increasing rate | |
| 177. |
The gases are considered incompressible if Match number is |
| A. | equal to 1.0 |
| B. | equal to 1.5 |
| C. | is more than 0.5 |
| D. | less than 0.2 |
| Answer» E. | |
| 178. |
Discharge through a totally submerged orifice, is directly proportional to |
| A. | difference in elevation of water surfaces |
| B. | square root of the difference in elevation of water surface |
| C. | square root of the opening |
| D. | reciprocal of the area of the opening |
| Answer» C. square root of the opening | |
| 179. |
Mercury is generally used in barometers because |
| A. | its vaour pressure is practically zero |
| B. | the height of the barometer will be less |
| C. | it is a best liquid |
| D. | both (a) and (b) above |
| Answer» E. | |
| 180. |
In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be |
| A. | 2 mm |
| B. | 4 mm |
| C. | 6 mm |
| D. | 8 mm |
| Answer» D. 8 mm | |
| 181. |
For a long pipe, the head loss |
| A. | at the entrance is ignored |
| B. | at the outlet is ignored |
| C. | at the entrance and outlet both are ignored |
| D. | due to friction is ignored. |
| Answer» D. due to friction is ignored. | |
| 182. |
Back water curve is caused if |
| A. | friction head loss is more than the bed slope |
| B. | pressure is due to weir in the channel |
| C. | there is an increase in width of the channel |
| D. | none of these. |
| Answer» C. there is an increase in width of the channel | |
| 183. |
Chezy's constant is suggested by |
| A. | Bazin |
| B. | Kutter |
| C. | Manning |
| D. | Powell. |
| Answer» B. Kutter | |
| 184. |
The formula Q = m x L x 2g x H3/2 where was suggested by : |
| A. | Bazin |
| B. | Francis |
| C. | Cipolletti |
| D. | None of these. |
| Answer» B. Francis | |
| 185. |
A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10, 000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is |
| A. | 10° 5' |
| B. | 10° 10' |
| C. | 10° 15' |
| D. | 10° 20' |
| Answer» D. 10¬∞ 20' | |
| 186. |
An orifice is taken as large if |
| A. | (H2 - H1) > H |
| B. | (H2 - H1) > H/4 |
| C. | (H2 - H1) > H/2 |
| D. | (H2 - H1) > H/3 |
| Answer» E. | |
| 187. |
Mach number is the ratio of inertia force to |
| A. | viscosity |
| B. | surface tension |
| C. | gravitational force |
| D. | elasticity. |
| Answer» E. | |
| 188. |
In a venturimeter, the divergent cone is kept |
| A. | shorter than convergent cone |
| B. | equal to covergent cone |
| C. | longer than convergent cone |
| D. | none of these. |
| Answer» D. none of these. | |
| 189. |
When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as |
| A. | free nappe |
| B. | depressed nappe |
| C. | clinging nappe |
| D. | none of these. |
| Answer» D. none of these. | |
| 190. |
Total energy line is |
| A. | pressure head |
| B. | datum head |
| C. | kinetic head |
| D. | All the above. |
| Answer» E. | |
| 191. |
Hydraulic coefficient of an orifice means the coefficient of |
| A. | velocity |
| B. | contraction |
| C. | resistance |
| D. | all the above. |
| Answer» E. | |
| 192. |
Flow in pipes is turbulent if Reynold number is |
| A. | less than 2100 |
| B. | more than 3000 |
| C. | between 2100 and 3000 |
| D. | none of these. |
| Answer» C. between 2100 and 3000 | |
| 193. |
For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is |
| A. | 6 m/sec |
| B. | 8 m/sec |
| C. | 10 m/sec |
| D. | 12 m/sec |
| Answer» D. 12 m/sec | |
| 194. |
The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called |
| A. | path line |
| B. | stream line |
| C. | potential line |
| D. | streak line. |
| Answer» C. potential line | |
| 195. |
'Flow net' can be drawn only if the flow is |
| A. | turbulent |
| B. | rotational |
| C. | distortion |
| D. | none of these. |
| Answer» D. none of these. | |
| 196. |
On an inclined plane, centre of pressure is located |
| A. | at the centroid |
| B. | above the centroid |
| C. | below the centroid |
| D. | anywhere. |
| Answer» D. anywhere. | |
| 197. |
Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is |
| A. | 17.5 m3 |
| B. | 20.0 m3 |
| C. | 22.5 m3 |
| D. | 25 km3. |
| Answer» D. 25 km3. | |
| 198. |
If the pressure at the inlet of a pipe is 90 kg/cm2 and pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission, is |
| A. | 0.666 |
| B. | 0.777 |
| C. | 0.555 |
| D. | 88.8%. |
| Answer» E. | |
| 199. |
The value of momentum correction factor (β) for a laminar flow through a circular pipe, is |
| A. | 43497 |
| B. | 43526 |
| C. | 43558 |
| D. | 43528 |
| Answer» E. | |
| 200. |
Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is |
| A. | more in the internal mouth piece |
| B. | less in the internal mouth piece |
| C. | equal to external mouth piece |
| D. | none of these. |
| Answer» B. less in the internal mouth piece | |