McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 201. |
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 | |
| 202. |
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 | |
| 203. |
If the depth of water in an open channel is less than the critical depth, the flow is called |
| A. | Critical flow |
| B. | Turbulent flow |
| C. | Tranquil flow |
| D. | Torrential flow |
| Answer» D. Torrential flow | |
| 204. |
Choose the wrong statement |
| A. | Fluids are capable of flowing |
| B. | Fluids conform to the shape of the containing vessels |
| C. | When in equilibrium, fluids cannot sustain tangential forces |
| D. | When in equilibrium, fluids can sustain shear forces |
| Answer» D. When in equilibrium, fluids can sustain shear forces | |
| 205. |
An orifice is said to be large, if |
| A. | The size of orifice is large |
| B. | The velocity of flow is large |
| C. | The available head of liquid is more than 5 times the height of orifice |
| D. | The available head of liquid is less than 5 times the height of orifice |
| Answer» D. The available head of liquid is less than 5 times the height of orifice | |
| 206. |
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury? |
| A. | The metal piece will simply float over the mercury |
| B. | The metal piece will be immersed in mercury by half |
| C. | Whole of the metal piece will be immersed with its top surface just at mercury level |
| D. | Metal piece will sink to the bottom |
| Answer» C. Whole of the metal piece will be immersed with its top surface just at mercury level | |
| 207. |
The centre of pressure acts __________ the centre of gravity of immersed surface. |
| A. | At |
| B. | Above |
| C. | Below |
| D. | None of these |
| Answer» C. Below | |
| 208. |
Dynamic viscosity of most of the liquids with rise in temperature |
| A. | Increases |
| B. | Decreases |
| C. | Remain unaffected |
| D. | Unpredictable |
| Answer» B. Decreases | |
| 209. |
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch) |
| A. | (8/15) Cd. 2g. H |
| B. | (8/15) Cd. 2g. H3/2 |
| C. | (8/15) Cd. 2g. H² |
| D. | (8/15) Cd. 2g. H5/2 |
| Answer» D. (8/15) Cd. 2g. H5/2 | |
| 210. |
A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is |
| A. | 9,000 kg |
| B. | 13,500 kg |
| C. | 18,000 kg |
| D. | 27,000 kg |
| Answer» B. 13,500 kg | |
| 211. |
Select the correct statement |
| A. | Local atmospheric pressure depends upon elevation of locality only |
| B. | Standard atmospheric pressure is the mean local atmospheric pressure a* sea level |
| C. | Local atmospheric pressure is always below standard atmospheric pressure |
| D. | A barometer reads the difference between local and standard atmospheric pressure |
| Answer» B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level | |
| 212. |
The shear stress-strain graph for a Newtonian fluid is a |
| A. | Straight line |
| B. | Parabolic curve |
| C. | Hyperbolic curve |
| D. | Elliptical |
| Answer» A. Straight line | |
| 213. |
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» D. Turbulent flow | |
| 214. |
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 | |
| 215. |
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 | |
| 216. |
The discharge through a channel of trapezoidal section is maximum when |
| A. | Width of channel at the top is equal to twice the width at the bottom |
| B. | Depth of channel is equal to the width at the bottom |
| C. | The sloping side is equal to half the width at the top |
| D. | The sloping side is equal to the width at the bottom |
| Answer» C. The sloping side is equal to half the width at the top | |
| 217. |
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 | |
| 218. |
The point at which the resultant pressure on an immersed surface acts, is known as |
| A. | Centre of gravity |
| B. | Centre of depth |
| C. | Centre of pressure |
| D. | Centre of immersed surface |
| Answer» C. Centre of pressure | |
| 219. |
Choose the wrong statement |
| A. | Any weight, floating or immersed in a liquid, is acted upon by a buoyant force |
| B. | Buoyant force is equal to the weight of the liquid displaced |
| C. | The point through which buoyant force acts, is called the center of buoyancy |
| D. | Center of buoyancy is located above the center of gravity of the displaced liquid |
| Answer» D. Center of buoyancy is located above the center of gravity of the displaced liquid | |
| 220. |
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 | |
| 221. |
The total pressure on the top of a closed cylindrical vessel completely filled up with a liquid is |
| A. | Directly proportional to (radius)2 |
| B. | Inversely proportional to (radius)2 |
| C. | Directly proportional to (radius)4 |
| D. | Inversely proportional to (radius)4 |
| Answer» C. Directly proportional to (radius)4 | |
| 222. |
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 | |
| 223. |
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 | |
| 224. |
A large Reynold number is indication of |
| A. | Smooth and streamline flow |
| B. | Laminar flow |
| C. | Steady flow |
| D. | Highly turbulent flow |
| Answer» D. Highly turbulent flow | |
| 225. |
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. | |
| 226. |
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 227. |
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 | |
| 228. |
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 | |
| 229. |
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 | |
| 230. |
The conditions for the stable equilibrium of a floating body are |
| A. | The metacentre should lie above the center of gravity |
| B. | The center of buoyancy and the center of gravity must lie on the same vertical line |
| C. | A righting couple should be formed |
| D. | All the above are correct |
| Answer» D. All the above are correct | |
| 231. |
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 | |
| 232. |
To avoid an interruption in the flow of a siphon, an air vessel is provided |
| A. | At the inlet |
| B. | At the outlet |
| C. | At the summit |
| D. | At any point between inlet and outlet |
| Answer» C. At the summit | |
| 233. |
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is |
| A. | 1.84(L - 0.1nH)H3/2 |
| B. | 1.84(L - nH)H2 |
| C. | 1.84(L - 0.1nH)H5/2 |
| D. | 1.84(L - nH)H3 |
| Answer» A. 1.84(L - 0.1nH)H3/2 | |
| 234. |
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 | |
| 235. |
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 5 meters of water column |
| D. | 6 meters of water Column |
| Answer» D. 6 meters of water Column | |
| 236. |
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface) |
| A. | w |
| B. | wh |
| C. | w/h |
| D. | h/w |
| Answer» B. wh | |
| 237. |
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to |
| A. | Buoyancy |
| B. | Equilibrium of a floating body |
| C. | Archimedes' principle |
| D. | Bernoulli's theorem |
| Answer» C. Archimedes' principle | |
| 238. |
The liquid used in manometers should have |
| A. | Low density |
| B. | High density |
| C. | Low surface tension |
| D. | High surface tension |
| Answer» D. High surface tension | |
| 239. |
Which of the following instrument can be used for measuring speed of an aeroplane? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Pitot tube |
| D. | Rotameter |
| Answer» C. Pitot tube | |
| 240. |
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is |
| A. | 0.46 |
| B. | 0.64 |
| C. | 0.78 |
| D. | 0.87 |
| Answer» B. 0.64 | |
| 241. |
Buoyant force is |
| A. | Resultant force acting on a floating body |
| B. | Equal to the volume of liquid displaced |
| C. | Force necessary to keep a body in equilibrium |
| D. | The resultant force on a body due to the fluid surrounding it |
| Answer» D. The resultant force on a body due to the fluid surrounding it | |
| 242. |
In case of flow through parallel pipes, |
| A. | The head loss for all the pipes is same |
| B. | The total discharge is equal to the sum of discharges in the various pipes |
| C. | The total head loss is the sum of head losses in the various pipes |
| D. | Both (A) and (B) |
| Answer» D. Both (A) and (B) | |
| 243. |
Rotameter is a device used to measure |
| A. | Absolute pressure |
| B. | Velocity of fluid |
| C. | Flow |
| D. | Rotation |
| Answer» C. Flow | |
| 244. |
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir. |
| A. | Equal to |
| B. | One-third |
| C. | Two-third |
| D. | Three-fourth |
| Answer» C. Two-third | |
| 245. |
When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as |
| A. | Centre of pressure |
| B. | Centre of gravity |
| C. | Centre of buoyancy |
| D. | Metacentre |
| Answer» D. Metacentre | |
| 246. |
A nozzle is generally made of |
| A. | Cylindrical shape |
| B. | Convergent shape |
| C. | Divergent shape |
| D. | Convergent-divergent shape |
| Answer» B. Convergent shape | |
| 247. |
Pitot tube is used for measurement of |
| A. | Pressure |
| B. | Flow |
| C. | Velocity |
| D. | Discharge |
| Answer» C. Velocity | |
| 248. |
The value of mass density in kg-sec-V- |
| A. | 1 |
| B. | 1000 |
| C. | 100 |
| D. | 101.9 |
| Answer» D. 101.9 | |
| 249. |
The shear stress between the two liquid layers is __________ proportional to the distance between two layers. |
| A. | Directly |
| B. | Inversely |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Inversely | |
| 250. |
Viscosity of water in comparison to mercury is |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | Higher/lower depending on temperature |
| Answer» A. Higher | |
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