McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 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 | |
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