McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 151. |
Euler's equation in the differential form for the motion of liquids is given by |
| A. | dp/ρ + g.dz + v.dv = 0 |
| B. | dp/ρ - g.dz + v.dv = 0 |
| C. | ρ.dp + g.dz + v.dv = 0 |
| D. | ρ.dp - g.dz + v.dv = 0 |
| Answer» A. dp/ρ + g.dz + v.dv = 0 | |
| 152. |
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity) |
| A. | tanθ = a/g |
| B. | tanθ = 2 a/g |
| C. | tanθ = a/2g |
| D. | tanθ = a2/2g |
| Answer» A. tanθ = a/g | |
| 153. |
A point, in a compressible flow where the velocity of fluid is zero, is called |
| A. | Critical point |
| B. | Vena contracta |
| C. | Stagnation point |
| D. | None of these |
| Answer» C. Stagnation point | |
| 154. |
For very great pressures, viscosity of moss gases and liquids |
| A. | Remain same |
| B. | Increases |
| C. | Decreases |
| D. | Shows erratic behavior |
| Answer» D. Shows erratic behavior | |
| 155. |
The angle of contact in case of a liquid depends upon |
| A. | The nature of the liquid and the solid |
| B. | The material which exists above the free surface of the liquid |
| C. | Both of die above |
| D. | Any one of the above |
| Answer» C. Both of die above | |
| 156. |
Water is _________ liquid. |
| A. | A compressible |
| B. | An incompressible |
| C. | Both A and B |
| D. | None of these |
| Answer» B. An incompressible | |
| 157. |
The unit of kinematic viscosity in S. I. units is |
| A. | N-m/s |
| B. | N-s/m2 |
| C. | m2/s |
| D. | N-m |
| Answer» C. m2/s | |
| 158. |
Bernoulli's equation is applied to |
| A. | Venturimeter |
| B. | Orifice meter |
| C. | Pitot tube |
| D. | All of these |
| Answer» D. All of these | |
| 159. |
Rain drops are spherical because of |
| A. | Viscosity |
| B. | Air resistance |
| C. | Surface tension forces |
| D. | Atmospheric pressure |
| Answer» C. Surface tension forces | |
| 160. |
General energy equation holds for |
| A. | Steady flow |
| B. | Turbulent flow |
| C. | Laminar flow |
| D. | Non-uniform flow |
| Answer» D. Non-uniform flow | |
| 161. |
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will |
| A. | Decrease |
| B. | Increase |
| C. | Remain unchanged |
| D. | Depend upon the characteristics of liquid |
| Answer» A. Decrease | |
| 162. |
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure. |
| A. | Plus |
| B. | Minus |
| C. | Divide |
| D. | Multiply |
| Answer» B. Minus | |
| 163. |
The dynamic viscosity of gases __________ with rise in temperature. |
| A. | Remain unaffected |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» B. Increases | |
| 164. |
The pressure of liquid at throat in a Venturimeter is __________ than that at inlet. |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | None of these |
| Answer» B. Lower | |
| 165. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» B. Uniform flow | |
| 166. |
The specific weight of water is 1000 kg/m3 |
| A. | At normal pressure of 760 mm |
| B. | At 4°C temperature |
| C. | At mean sea level |
| D. | All the above |
| Answer» D. All the above | |
| 167. |
If the depth of water in an open channel is greater than the critical depth, the flow is called |
| A. | Critical flow |
| B. | Turbulent flow |
| C. | Tranquil flow |
| D. | Torrential flow |
| Answer» C. Tranquil flow | |
| 168. |
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be |
| A. | 500 kg |
| B. | 1000 kg |
| C. | 1500 kg |
| D. | 2000 kg |
| Answer» D. 2000 kg | |
| 169. |
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension) |
| A. | 4wd/σ cosα |
| B. | σ cosα/4wd |
| C. | 4σ cosα/wd |
| D. | wd/4σ cosα |
| Answer» C. 4σ cosα/wd | |
| 170. |
Two dimensional flows occurs when |
| A. | The direction and magnitude of the velocity at all points are identical |
| B. | The velocity of successive fluid particles, at any point, is the same at successive periods of time |
| C. | The magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane |
| Answer» D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane | |
| 171. |
The force per unit length is the unit of |
| A. | Surface tension |
| B. | Compressibility |
| C. | Capillarity |
| D. | Viscosity |
| Answer» A. Surface tension | |
| 172. |
One cubic metre of water weighs |
| A. | 100 liters |
| B. | 250 liters |
| C. | 500 liters |
| D. | 1000 liters |
| Answer» D. 1000 liters | |
| 173. |
Kinematic viscosity is dependent upon |
| A. | Pressure |
| B. | Distance |
| C. | Density |
| D. | Flow |
| Answer» C. Density | |
| 174. |
The Euler's equation for the motion of liquids is based upon the assumption that |
| A. | The fluid is non - viscous, homogeneous and incompressible |
| B. | The velocity of flow is uniform over the section |
| C. | The flow is continuous, steady and along the stream line |
| D. | All of the above |
| Answer» D. All of the above | |
| 175. |
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Hot wire anemometer |
| D. | Pitot tube |
| Answer» D. Pitot tube | |
| 176. |
Property of a fluid by which its own molecules are attracted is called |
| A. | Adhesion |
| B. | Cohesion |
| C. | Viscosity |
| D. | Compressibility |
| Answer» B. Cohesion | |
| 177. |
Which of the following is the unit of kinematic viscosity? |
| A. | Pascal |
| B. | Poise |
| C. | Stoke |
| D. | Faraday |
| Answer» C. Stoke | |
| 178. |
A differential manometer is used to measure |
| A. | Atmospheric pressure |
| B. | Pressure in pipes and channels |
| C. | Pressure in Venturimeter |
| D. | Difference of pressures between two points in a pipe |
| Answer» D. Difference of pressures between two points in a pipe | |
| 179. |
In a venturi-flume, the flow takes place at |
| A. | Atmospheric pressure |
| B. | Gauge pressure |
| C. | Absolute pressure |
| D. | None of these |
| Answer» A. Atmospheric pressure | |
| 180. |
The normal stress is same in all directions at a point in a fluid |
| A. | Only when the fluid is frictionless |
| B. | Only when the fluid is incompressible and has zero viscosity |
| C. | When there is no motion of one fluid layer relative to an adjacent layer |
| D. | Irrespective of the motion of one fluid layer relative to an adjacent layer |
| Answer» C. When there is no motion of one fluid layer relative to an adjacent layer | |
| 181. |
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid) |
| A. | wH |
| B. | wH/2 |
| C. | wH2/2 |
| D. | wH2/3 |
| Answer» C. wH2/2 | |
| 182. |
Which of the following manometer has highest sensitivity? |
| A. | U-tube with water |
| B. | Inclined U-tube |
| C. | U-tube with mercury |
| D. | Micro-manometer with water |
| Answer» D. Micro-manometer with water | |
| 183. |
Which of the following statement is wrong? |
| A. | A flow whose streamline is represented by a curve is called two dimensional flow. |
| B. | The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy. |
| C. | The length of divergent portion in a Venturimeter is equal to the convergent portion. |
| D. | A pitot tube is used to measure the velocity of flow at the required point in a pipe. |
| Answer» C. The length of divergent portion in a Venturimeter is equal to the convergent portion. | |
| 184. |
Density of water is maximum at |
| A. | 0° C |
| B. | 0° K |
| C. | 4° C |
| D. | 100° C |
| Answer» C. 4° C | |
| 185. |
The bulk modulus of elasticity |
| A. | Has the dimensions of 1/pressure |
| B. | Increases with pressure |
| C. | Is large when fluid is more compressible |
| D. | Is independent of pressure and viscosity |
| Answer» B. Increases with pressure | |
| 186. |
Kinematic viscosity is equal to |
| A. | Dynamic viscosity/density |
| B. | Dynamic viscosity × density |
| C. | Density/dynamic viscosity |
| D. | 1/dynamic viscosity × density |
| Answer» A. Dynamic viscosity/density | |
| 187. |
The atmospheric pressure at sea level is |
| A. | 103 kN/m2 |
| B. | 10.3 m of water |
| C. | 760 mm of mercury |
| D. | All of these |
| Answer» D. All of these | |
| 188. |
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because |
| A. | It is easier to see through the glass tube |
| B. | Glass tube is cheaper than a metallic tube |
| C. | It is not possible to conduct this experiment with any other tube |
| D. | All of the above |
| Answer» A. It is easier to see through the glass tube | |
| 189. |
In an isothermal atmosphere, the pressure |
| A. | Decreases linearly with elevation |
| B. | Remain constant |
| C. | Varies in the same way as the density |
| D. | Increases exponentially with elevation |
| Answer» C. Varies in the same way as the density | |
| 190. |
The pressure of a liquid measured with the help of a Piezometer tube is |
| A. | Vacuum pressure |
| B. | Gauge pressure |
| C. | Absolute pressure |
| D. | Atmospheric pressure |
| Answer» B. Gauge pressure | |
| 191. |
For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called |
| A. | Continuity equation |
| B. | Bernoulli's equation |
| C. | Pascal's law |
| D. | Archimedes’s principle |
| Answer» B. Bernoulli's equation | |
| 192. |
Uniform flow occurs when |
| A. | The direction and magnitude of the velocity at all points are identical |
| B. | The velocity of successive fluid particles, at any point, is the same at successive periods of time |
| C. | The magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure |
| Answer» C. The magnitude and direction of the velocity do not change from point to point in the fluid | |
| 193. |
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be |
| A. | Minimum |
| B. | Maximum |
| C. | Zero |
| D. | Could be any value |
| Answer» D. Could be any value | |
| 194. |
Piezometer is used to measure |
| A. | Pressure in pipe, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressures |
| D. | Difference of pressure between two points |
| Answer» C. Very low pressures | |
| 195. |
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be |
| A. | 2 metres of water column |
| B. | 3 metres of water column |
| C. | 3.5 metres of water column |
| D. | 4 m of water column |
| Answer» B. 3 metres of water column | |
| 196. |
The flow which neglects changes in a transverse direction is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» A. One dimensional flow | |
| 197. |
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called |
| A. | Pascal's law |
| B. | Archimedes’s principle |
| C. | D-Alembert's principle |
| D. | None of these |
| Answer» C. D-Alembert's principle | |
| 198. |
The mass per unit volume of a liquid at a standard temperature and pressure is called |
| A. | Specific weight |
| B. | Mass density |
| C. | Specific gravity |
| D. | None of these |
| Answer» B. Mass density | |
| 199. |
The velocity of the liquid flowing through the divergent portion of a Venturimeter |
| A. | Remains constant |
| B. | Increases |
| C. | Decreases |
| D. | Depends upon mass of liquid |
| Answer» C. Decreases | |
| 200. |
The volumetric change of the fluid caused by a resistance is known as |
| A. | Volumetric strain |
| B. | Volumetric index |
| C. | Compressibility |
| D. | Adhesion |
| Answer» C. Compressibility | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.