McqMate
| 101. |
Unit of surface tension is |
| A. | Energy/unit area |
| B. | Velocity/unit area |
| C. | Both of the above |
| D. | It has no units |
| Answer» A. Energy/unit area | |
| 102. |
A Piezometer tube is used only for measuring |
| A. | Low pressure |
| B. | High pressure |
| C. | Moderate pressure |
| D. | Vacuum pressure |
| Answer» C. Moderate pressure | |
| 103. |
The Cipoletti weir is a __________ weir. |
| A. | Rectangular |
| B. | Triangular |
| C. | Trapezoidal |
| D. | Circular |
| Answer» C. Trapezoidal | |
| 104. |
Pressure of the order of 10" torr can be measured by |
| A. | Bourdon tube |
| B. | Pirani Gauge |
| C. | Micro -manometer |
| D. | Lonisation gauge |
| Answer» D. Lonisation gauge | |
| 105. |
The volume of a fluid __________ as the pressure increases. |
| A. | Remains same |
| B. | Decreases |
| C. | Increases |
| D. | None of these |
| Answer» B. Decreases | |
| 106. |
Buoyant force is |
| A. | The resultant force acting on a floating body |
| B. | The resultant force on a body due to the fluid surrounding it |
| C. | Equal to the volume of liquid displaced |
| D. | The force necessary to maintain equilibrium of a submerged body |
| Answer» B. The resultant force on a body due to the fluid surrounding it | |
| 107. |
A flow through a long pipe at decreasing rate is called __________ uniform flow. |
| A. | Steady |
| B. | Unsteady |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Unsteady | |
| 108. |
Choose the wrong statement |
| A. | The center of buoyancy is located at the center of gravity of the displaced liquid |
| B. | For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy |
| C. | If C.G. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions |
| D. | All floating bodies are stable |
| Answer» D. All floating bodies are stable | |
| 109. |
The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface. |
| A. | Equal |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» B. Directly proportional | |
| 110. |
The discharge in an open channel corresponding to critical depth is |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | None of these |
| Answer» C. Maximum | |
| 111. |
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is |
| A. | 0.83 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» B. 0.6 | |
| 112. |
A pitot tube is used to measure the |
| A. | Velocity of flow at the required point in a pipe |
| B. | Pressure difference between two points in a pipe |
| C. | Total pressure of liquid flowing in a pipe |
| D. | Discharge through a pipe |
| Answer» A. Velocity of flow at the required point in a pipe | |
| 113. |
The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream |
| A. | Keeps on increasing |
| B. | Keeps on decreasing |
| C. | Remain constant |
| D. | May increase/decrease |
| Answer» C. Remain constant | |
| 114. |
The critical depth meter is used to measure |
| A. | Velocity of flow in an open channel |
| B. | Depth of flow in an open channel |
| C. | Hydraulic jump |
| D. | Depth of channel |
| Answer» C. Hydraulic jump | |
| 115. |
Two pipe systems can be said to be equivalent, when the following quantities are same |
| A. | Friction loss and flow |
| B. | Length and diameter |
| C. | Flow and length |
| D. | Friction factor and diameter |
| Answer» A. Friction loss and flow | |
| 116. |
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be |
| A. | Double |
| B. | Four times |
| C. | Eight times |
| D. | Sixteen times |
| Answer» D. Sixteen times | |
| 117. |
The value of bulk modulus of a fluid is required to determine |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Mach number |
| D. | Euler's number |
| Answer» C. Mach number | |
| 118. |
Fluid is a substance which offers no resistance to change of |
| A. | Pressure |
| B. | Flow |
| C. | Shape |
| D. | Volume |
| Answer» C. Shape | |
| 119. |
The pressure less than atmospheric pressure is known as |
| A. | Suction pressure |
| B. | Vacuum pressure |
| C. | Negative gauge pressure |
| D. | All of these |
| Answer» D. All of these | |
| 120. |
The normal stress in a fluid will be constant in all directions at a point only if |
| A. | It is incompressible |
| B. | It has uniform viscosity |
| C. | It has zero viscosity |
| D. | It is at rest |
| Answer» D. It is at rest | |
| 121. |
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s) |
| A. | w × Q × H |
| B. | w × Q × hf |
| C. | w × Q (H - hf) |
| D. | w × Q (H + h ) |
| Answer» C. w × Q (H - hf) | |
| 122. |
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if |
| A. | Length of both the pipes is same |
| B. | Diameter of both the pipes is same |
| C. | Loss of head and discharge of both the pipes is same |
| D. | Loss of head and velocity of flow in both the pipes is same |
| Answer» C. Loss of head and discharge of both the pipes is same | |
| 123. |
The center of gravity of the volume of the liquid displaced by an immersed body is called |
| A. | Metacentre |
| B. | Center of pressure |
| C. | Center of buoyancy |
| D. | Center of gravity |
| Answer» C. Center of buoyancy | |
| 124. |
A flow is called sub-sonic, if the Mach number is |
| A. | Less than unity |
| B. | Unity |
| C. | Between 1 and 6 |
| D. | More than 6 |
| Answer» A. Less than unity | |
| 125. |
Barometer is used to measure |
| A. | Pressure in pipes, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressure |
| D. | Difference of pressure between two points |
| Answer» B. Atmospheric pressure | |
| 126. |
The center of pressure of a surface subjected to fluid pressure is the point |
| A. | On the surface at which resultant pressure acts |
| B. | On the surface at which gravitational force acts |
| C. | At which all hydraulic forces meet |
| D. | Similar to metacentre |
| Answer» A. On the surface at which resultant pressure acts | |
| 127. |
The variation in the volume of a liquid with the variation of pressure is called its |
| A. | Surface tension |
| B. | Compressibility |
| C. | Capillarity |
| D. | Viscosity |
| Answer» B. Compressibility | |
| 128. |
The surface tension of mercury at normal temperature is __________ that of water. |
| A. | Same as |
| B. | Lower than |
| C. | Higher than |
| D. | None of these |
| Answer» C. Higher than | |
| 129. |
Flow of water in a pipe about 3 metres in diameter can be measured by |
| A. | Orifice plate |
| B. | Venturimeter |
| C. | Rotameter |
| D. | Pitot tube |
| Answer» D. Pitot tube | |
| 130. |
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions) |
| A. | (2/3) × Cd (L - nH) × |
| B. | (2/3) × Cd (L - 0.1nH) × × H3/2 |
| C. | (2/3) × Cd (L - nH) × × H² |
| D. | (2/3) × Cd (L - nH) × × H5/2 |
| Answer» B. (2/3) × Cd (L - 0.1nH) × × H3/2 | |
| 131. |
The equation of continuity holds good when the flow |
| A. | Is steady |
| B. | Is one dimensional |
| C. | Velocity is uniform at all the cross sections |
| D. | All of the above |
| Answer» D. All of the above | |
| 132. |
A thick liquid like syrup has a __________ viscosity than a light liquid like water. |
| A. | Lesser |
| B. | Greater |
| C. | Same |
| D. | None of these |
| Answer» B. Greater | |
| 133. |
Cavitation will begin when |
| A. | The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid |
| B. | Pressure becomes more than critical pressure |
| C. | Flow is increased |
| D. | Pressure is increased |
| Answer» A. The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid | |
| 134. |
When a liquid is flowing through a pipe, the velocity of the liquid is |
| A. | Maximum at the centre and minimum near the walls |
| B. | Minimum at the centre and maximum near the walls |
| C. | Zero at the centre and maximum near the walls |
| D. | Maximum at the centre and zero near the walls |
| Answer» A. Maximum at the centre and minimum near the walls | |
| 135. |
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. |
| A. | 0.34 times |
| B. | 0.67 times |
| C. | 0.81 times |
| D. | 0.95 times |
| Answer» C. 0.81 times | |
| 136. |
Resultant pressure of the liquid in the case of an immersed body acts through |
| A. | Centre of gravity |
| B. | Centre of pressure |
| C. | Metacentre |
| D. | Centre of buoyancy |
| Answer» B. Centre of pressure | |
| 137. |
A fluid is said to be ideal, if it is |
| A. | Incompressible |
| B. | Viscous and incompressible |
| C. | Inviscous and compressible |
| D. | Inviscous and incompressible |
| Answer» D. Inviscous and incompressible | |
| 138. |
In a depressed nappe |
| A. | The pressure below the nappe is atmospheric |
| B. | The pressure below the nappe is negative |
| C. | The pressure above the nappe is atmospheric |
| D. | The pressure above the nappe is negative |
| Answer» B. The pressure below the nappe is negative | |
| 139. |
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to |
| A. | 2100 |
| B. | 2700 |
| C. | 10,000 |
| D. | 21,000 |
| Answer» D. 21,000 | |
| 140. |
In one dimensional flow, the flow |
| A. | Is steady and uniform |
| B. | Takes place in straight line |
| C. | Takes place in curve |
| D. | Takes place in one direction |
| Answer» B. Takes place in straight line | |
| 141. |
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than |
| A. | 2.4 m above the hydraulic gradient |
| B. | 6.4 m above the hydraulic gradient |
| C. | 10.0 m above the hydraulic gradient |
| D. | 5.0 above the hydraulic gradient |
| Answer» B. 6.4 m above the hydraulic gradient | |
| 142. |
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe) |
| A. | v²/2g |
| B. | 0.5v²/2g |
| C. | 0.375v²/2g |
| D. | 0.75v²/2g |
| Answer» A. v²/2g | |
| 143. |
Metacentre is the point of intersection of |
| A. | Vertical upward force through e.g. of body and center line of body |
| B. | Buoyant force and the center line of body |
| C. | Midpoint between e.g. and center of buoyancy |
| D. | All of the above |
| Answer» B. Buoyant force and the center line of body | |
| 144. |
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as |
| A. | Path line |
| B. | Stream line |
| C. | Steak line |
| D. | Potential line |
| Answer» B. Stream line | |
| 145. |
An open vessel of water is accelerated up an inclined plane. The free water surface will |
| A. | Be horizontal |
| B. | Make an angle in direction of inclination of inclined plane |
| C. | Make an angle in opposite direction to inclination of inclined plane |
| D. | Any one of above is possible |
| Answer» C. Make an angle in opposite direction to inclination of inclined plane | |
| 146. |
The discharge over a rectangular notch is |
| A. | Inversely proportional to H3/2 |
| B. | Directly proportional to H3/2 |
| C. | Inversely proportional to H5/2 |
| D. | Directly proportional to H5/2 |
| Answer» B. Directly proportional to H3/2 | |
| 147. |
The flow in which each liquid particle has a definite path and their paths do not cross each other is called |
| A. | One dimensional flow |
| B. | Streamline flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» B. Streamline flow | |
| 148. |
The magnitude of water hammer depends upon the |
| A. | Elastic properties of the pipe material |
| B. | Elastic properties of the liquid flowing through the pipe |
| C. | Speed at which the valve is closed |
| D. | All of the above |
| Answer» D. All of the above | |
| 149. |
The fluid forces considered in the Navier Stokes equation are |
| A. | Gravity, pressure and viscous |
| B. | Gravity, pressure and turbulent |
| C. | Pressure, viscous and turbulent |
| D. | Gravity, viscous and turbulent |
| Answer» A. Gravity, pressure and viscous | |
| 150. |
Cavitation is caused by |
| A. | High velocity |
| B. | High pressure |
| C. | Weak material |
| D. | Low pressure |
| Answer» D. Low pressure | |
| 151. |
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 acts at a distance __________ from the liquid surface. |
| A. | H/3 |
| B. | H/2 |
| C. | 2H/3 |
| D. | 3H/4 |
| Answer» C. 2H/3 | |
| 152. |
An ideal flow of any fluid must fulfill the following |
| A. | Newton's law of motion |
| B. | Newton's law of viscosity |
| C. | Pascal' law |
| D. | Continuity equation |
| Answer» D. Continuity equation | |
| 153. |
The flow in a pipe or channel is said to be uniform when |
| A. | The liquid particles at all sections have the same velocities |
| B. | The liquid particles at different sections have different velocities |
| C. | The quantity of liquid flowing per second is constant |
| D. | Each liquid particle has a definite path |
| Answer» A. The liquid particles at all sections have the same velocities | |
| 154. |
Surface tension |
| A. | Acts in the plane of the interface normal to any line in the surface |
| B. | Is also known as capillarity |
| C. | Is a function of the curvature of the interface |
| D. | Decreases with fall in temperature |
| Answer» A. Acts in the plane of the interface normal to any line in the surface | |
| 155. |
Select the wrong statement |
| A. | An equivalent pipe is treated as an ordinary pipe for all calculations |
| B. | The length of an equivalent pipe is equal to that of a compound pipe |
| C. | The discharge through an equivalent pipe is equal to that of a compound pipe |
| D. | The diameter of an equivalent pipe is equal to that of a compound pipe |
| Answer» D. The diameter of an equivalent pipe is equal to that of a compound pipe | |
| 156. |
manometers because Alcohol is used in |
| A. | It has low vapour pressure |
| B. | It is clearly visible |
| C. | It has low surface tension |
| D. | It can provide longer column due to low density |
| Answer» D. It can provide longer column due to low density | |
| 157. |
If no resistance is encountered by displacement, such a substance is known as |
| A. | Fluid |
| B. | Water |
| C. | Gas |
| D. | Ideal fluid |
| Answer» D. Ideal fluid | |
| 158. |
The kinematic viscosity is the |
| A. | Ratio of absolute viscosity to the density of the liquid |
| B. | Ratio of density of the liquid to the absolute viscosity |
| C. | Product of absolute viscosity and density of the liquid |
| D. | Product of absolute viscosity and mass of the liquid |
| Answer» A. Ratio of absolute viscosity to the density of the liquid | |
| 159. |
The viscosity of water is __________ than that of mercury. |
| A. | Higher |
| B. | Lower |
| C. | Same as |
| D. | None of these |
| Answer» A. Higher | |
| 160. |
Surface energy per unit area of a surface is numerically equal to |
| A. | Atmospheric pressure |
| B. | Surface tension |
| C. | Force of adhesion |
| D. | Force of cohesion |
| Answer» B. Surface tension | |
| 161. |
The specific weight of sea water is __________ that of pure water. |
| A. | Same as |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 162. |
Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Nozzle |
| D. | All of the above |
| Answer» D. All of the above | |
| 163. |
The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is |
| A. | 2.4 m |
| B. | 3.0 m |
| C. | 4.0 m |
| D. | 5.0 m |
| Answer» B. 3.0 m | |
| 164. |
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice. |
| A. | Less than twice |
| B. | More than twice |
| C. | Less than three times |
| D. | More than three times |
| Answer» C. Less than three times | |
| 165. |
An ideal flow of any fluid must satisfy |
| A. | Pascal law |
| B. | Newton's law of viscosity |
| C. | Boundary layer theory |
| D. | Continuity equation |
| Answer» D. Continuity equation | |
| 166. |
The height of a water column equivalent to a pressure of 0.15 MPa is |
| A. | 15.3 m |
| B. | 25.3 m |
| C. | 35.3 m |
| D. | 45.3 m |
| Answer» A. 15.3 m | |
| 167. |
The region between the separation streamline and the boundary surface of the solid body is known as |
| A. | Wake |
| B. | Drag |
| C. | Lift |
| D. | Boundary layer |
| Answer» A. Wake | |
| 168. |
Froude number is significant in |
| A. | Supersonics, as with projectile and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls |
| D. | All of the above |
| Answer» C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls | |
| 169. |
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called |
| A. | Density of liquid |
| B. | Specific gravity of liquid |
| C. | Compressibility of liquid |
| D. | Surface tension of liquid |
| Answer» B. Specific gravity of liquid | |
| 170. |
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to |
| A. | 10 kg |
| B. | 100 kg |
| C. | 1000 kg |
| D. | 1 kg |
| Answer» A. 10 kg | |
| 171. |
The total head of a liquid particle in motion is equal to |
| A. | Pressure head + kinetic head + potential head |
| B. | Pressure head - (kinetic head + potential head) |
| C. | Potential head - (pressure head + kinetic head) |
| D. | Kinetic head - (pressure head + potential head) |
| Answer» A. Pressure head + kinetic head + potential head | |
| 172. |
Free surface of a liquid tends to contract to the smallest possible area due to force of |
| A. | Surface tension |
| B. | Viscosity |
| C. | Friction |
| D. | Cohesion |
| Answer» A. Surface tension | |
| 173. |
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. |
| A. | The bodies A and B have equal stability |
| B. | The body A is more stable than body B |
| C. | The body B is more stable than body A |
| D. | The bodies A and B are unstable |
| Answer» C. The body B is more stable than body A | |
| 174. |
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will |
| A. | Increase |
| B. | Remain unaffected |
| C. | May increase or decrease depending on the characteristics of liquid |
| D. | Decrease |
| Answer» D. Decrease | |
| 175. |
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface) |
| A. | wA |
| B. | wx |
| C. | wAx |
| D. | wA/x |
| Answer» C. wAx | |
| 176. |
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe. |
| A. | Less than |
| B. | More than |
| C. | Equal to |
| D. | None of these |
| Answer» B. More than | |
| 177. |
The line of action of the buoyant force acts through the Centroid of the |
| A. | Submerged body |
| B. | Volume of the floating body |
| C. | Volume of the fluid vertically above the body |
| D. | Displaced volume of the fluid |
| Answer» D. Displaced volume of the fluid | |
| 178. |
The intensity of pressure at any point, in a liquid, is |
| A. | Directly proportional to the area of the vessel containing liquid |
| B. | Directly proportional to the depth of liquid from the surface |
| C. | Directly proportional to the length of the vessel containing liquid |
| D. | Inversely proportional to the depth of liquid from the surface |
| Answer» B. Directly proportional to the depth of liquid from the surface | |
| 179. |
During the opening of a valve in a pipe line, the flow is |
| A. | Steady |
| B. | Unsteady |
| C. | Uniform |
| D. | Laminar |
| Answer» B. Unsteady | |
| 180. |
A 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» B. Pressure in pipes and channels | |
| 181. |
For hypersonic flow, the Mach number is |
| A. | Unity |
| B. | Greater than unity |
| C. | Greater than 2 |
| D. | Greater than 4 |
| Answer» D. Greater than 4 | |
| 182. |
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta) |
| A. | 2gH |
| B. | H × g) |
| C. | 2g × H |
| D. | 2gh) |
| Answer» D. 2gh) | |
| 183. |
For pipes, laminar flow occurs when Reynolds number is |
| A. | Less than 2000 |
| B. | Between 2000 and 4000 |
| C. | More than 4000 |
| D. | Less than 4000 |
| Answer» A. Less than 2000 | |
| 184. |
When the flow in an open channel is gradually varied, the flow is said to be |
| A. | Steady uniform flow |
| B. | Steady non-uniform flow |
| C. | Unsteady uniform flow |
| D. | Unsteady non-uniform flow |
| Answer» B. Steady non-uniform flow | |
| 185. |
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be |
| A. | Running full |
| B. | Running free |
| C. | Partially running full |
| D. | Partially running free |
| Answer» B. Running free | |
| 186. |
The units of kinematic viscosity are |
| A. | Metres² per sec |
| B. | kg sec/metre |
| C. | Newton-sec per metre |
| D. | Newton-sec per metre |
| Answer» A. Metres² per sec | |
| 187. |
The length of a liquid stream while flowing over a weir __________ at the ends of the sill. |
| A. | Expands |
| B. | Does not change |
| C. | Contracts |
| D. | None of these |
| Answer» C. Contracts | |
| 188. |
Newton's law of viscosity is a relationship between |
| A. | Shear stress and the rate of angular distortion |
| B. | Shear stress and viscosity |
| C. | Shear stress, velocity and viscosity |
| D. | Pressure, velocity and viscosity |
| Answer» A. Shear stress and the rate of angular distortion | |
| 189. |
The total energy line lies over the hydraulic gradient line by an amount equal to the |
| A. | Pressure head |
| B. | Velocity head |
| C. | Pressure head + velocity head |
| D. | Pressure head - velocity head |
| Answer» B. Velocity head | |
| 190. |
Choose the wrong statement |
| A. | The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface |
| B. | The horizontal component acts through the center of pressure for the vertical projection |
| C. | The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area |
| D. | The vertical component passes through the center of pressure of the volume |
| Answer» D. The vertical component passes through the center of pressure of the volume | |
| 191. |
In open channels, the specific energy is the |
| A. | Total energy per unit discharge |
| B. | Total energy measured with respect to the datum passing through the bottom of the channel |
| C. | Total energy measured above the horizontal datum |
| D. | Kinetic energy plotted above the free surface of water |
| Answer» B. Total energy measured with respect to the datum passing through the bottom of the channel | |
| 192. |
For a floating body to be in stable equilibrium, its metacentre should be |
| A. | Below the center of gravity |
| B. | Below the center of buoyancy |
| C. | Above the center of buoyancy |
| D. | Above the center of gravity |
| Answer» D. Above the center of gravity | |
| 193. |
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is |
| A. | 2.89 kN |
| B. | 8.29 kN |
| C. | 9.28 kN |
| D. | 28.9 kN |
| Answer» B. 8.29 kN | |
| 194. |
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be |
| A. | 1000 kg |
| B. | 4000 kg |
| C. | 2000 kg |
| D. | 8000 kg |
| Answer» A. 1000 kg | |
| 195. |
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium. |
| A. | Neutral |
| B. | Stable |
| C. | Unstable |
| D. | None of these |
| Answer» A. Neutral | |
| 196. |
A streamline is defined as the line |
| A. | Parallel to central axis flow |
| B. | Parallel to outer surface of pipe |
| C. | Of equal velocity in a flow |
| D. | Along which the pressure drop is uniform |
| Answer» C. Of equal velocity in a flow | |
| 197. |
The flow in a pipe or channel is said to be non-uniform when |
| A. | The liquid particles at all sections have the same velocities |
| B. | The liquid particles at different sections have different velocities |
| C. | The quantity of liquid flowing per second is constant |
| D. | Each liquid particle has a definite path |
| Answer» B. The liquid particles at different sections have different velocities | |
| 198. |
Hydrometer is used to determine |
| A. | Specific gravity of liquids |
| B. | Specific gravity of solids |
| C. | Specific gravity of gases |
| D. | Relative humidity |
| Answer» A. Specific gravity of liquids | |
| 199. |
The dynamic viscosity of the liquid __________ with rise in temperature. |
| A. | Remain unaffected |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» C. Decreases | |
| 200. |
For pipes, turbulent flow occurs when Reynolds number is |
| A. | Less than 2000 |
| B. | Between 2000 and 4000 |
| C. | More than 4000 |
| D. | Less than 4000 |
| Answer» C. More than 4000 | |
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