MCQOPTIONS
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MCQOPTIONS
This section includes 1608 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The ratio of pressure forces to inertial forces is called the __________ number.%! |
| A. | Froude |
| B. | Euler |
| C. | Reynold |
| D. | Mach |
| Answer» C. Reynold | |
| 202. |
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.%! |
| A. | Newtonion |
| B. | Non-Newtonion |
| C. | Ideal |
| D. | Incompressible |
| Answer» B. Non-Newtonion | |
| 203. |
What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?%! |
| A. | 0.003 |
| B. | 0.01 |
| C. | 0.1 |
| D. | 0.3 |
| Answer» B. 0.01 | |
| 204. |
The normal stress is the same in all directions at a point in a fluid, when the fluid is%! |
| A. | Non-viscous |
| B. | Incompressible |
| C. | Both A and B |
| D. | Having no motion of one fluid layer relative to the other |
| Answer» E. | |
| 205. |
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the%! |
| A. | Length is shorter |
| B. | Throat diameter is more |
| C. | Sudden expansion of flow in the downstream occurs |
| D. | Distance between the throat and the inlet is more |
| Answer» D. Distance between the throat and the inlet is more | |
| 206. |
Which of the following pipe bends will incur the largest head loss ?%! |
| A. | U-bend |
| B. | 30° bend |
| C. | 45° bend |
| D. | 90° bend |
| Answer» B. 30¬¨‚àû bend | |
| 207. |
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is%! |
| A. | Q/2 |
| B. | Q/4 |
| C. | Q/8 |
| D. | Q/16 |
| Answer» E. | |
| 208. |
A venturimeter can not be used for the direct measurement of%! |
| A. | Datum difference in the stretch of pipeflow |
| B. | Pressure difference in the flow throughpipeline |
| C. | Friction loss in pipe flow |
| D. | All of the above |
| Answer» E. | |
| 209. |
The terminal velocity of a small sphere settling in a viscous fluid varies as the%! |
| A. | First power of its dimeter |
| B. | Inverse of the fluid viscosity |
| C. | Inverse square of the diameter |
| D. | Square of the difference in specific weights of solid & fluid |
| Answer» C. Inverse square of the diameter | |
| 210. |
For laminar flow through a closed conduit%! |
| A. | Vmax = 2Vav |
| B. | Vmax = Vav |
| C. | Vmax = 1.5Vav |
| D. | Vmax = 0.5Vav |
| Answer» B. Vmax = Vav | |
| 211. |
Which of the following is the most common pump for pumping either raw sewage or sludge?%! |
| A. | Electromagnetic pump |
| B. | Centrifugal pump |
| C. | Reciprocating pump |
| D. | Gear pump |
| Answer» D. Gear pump | |
| 212. |
When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an%! |
| A. | Ejector |
| B. | Blower |
| C. | Injector |
| D. | Airlift |
| Answer» E. | |
| 213. |
Air vessel provided in a reciprocating pump%! |
| A. | Smoothens the flow by avoiding pulsations |
| B. | Increases the volumetric efficiency of the pump |
| C. | Saves the pump from the danger of cavitation |
| D. | None of these |
| Answer» E. | |
| 214. |
Open channel liquid flow is most conveniently measured by a%! |
| A. | Hot wire anemometer |
| B. | Notch |
| C. | Rotameter |
| D. | Segmental orifice |
| Answer» C. Rotameter | |
| 215. |
Specific speed for a centrifugal pump is%! |
| A. | N‚à öQ/H3/4 |
| B. | N‚à öQ/H2/3 |
| C. | N‚à öQ/H1/4 |
| D. | N‚à öQ/H |
| Answer» B. N‚Äö√ √∂Q/H2/3 | |
| 216. |
For laminar flow of Newtonion fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship.%! |
| A. | Logarithmic |
| B. | Parabolic |
| C. | Hyperbolic |
| D. | Linear |
| Answer» C. Hyperbolic | |
| 217. |
Pick out the wrong statement about a streamline.%! |
| A. | It is always parallel to the main direction of the fluid flow |
| B. | It is a line across which there is no flow and it is equivalent to a rigid boundary |
| C. | Streamlines intersect at isolated point of zero velocity and infintie velocity |
| D. | The fluid lying between any two streamlines can be considered to be in isolation and the streamline spacing varies inversely as the velocity |
| Answer» B. It is a line across which there is no flow and it is equivalent to a rigid boundary | |
| 218. |
Cd for the orifice plate varies from%! |
| A. | 0.58 to 0.8 |
| B. | 0.93 to 0.98 |
| C. | 0.2 to 0.3 |
| D. | 0.02 to 0.03 |
| Answer» B. 0.93 to 0.98 | |
| 219. |
With increase in temperature, the vapor pressure of liquids%! |
| A. | Increases |
| B. | Increases linearly |
| C. | Decreases |
| D. | Remains constant |
| Answer» B. Increases linearly | |
| 220. |
Most commonly used joint in the underground pipe lines is the%! |
| A. | Sleevejoint |
| B. | Coupling |
| C. | Flange |
| D. | Expansion joint |
| Answer» B. Coupling | |
| 221. |
In fluid flow, the stagnation point is defined as a point, where the __________ is zero.%! |
| A. | Flow velocity |
| B. | Pressure |
| C. | Total energy |
| D. | All of the above |
| Answer» B. Pressure | |
| 222. |
The co-efficient of discharge of an orificemeter is a function of%! |
| A. | Reynolds number at the orifice |
| B. | Ratio of orifice dia to pipe dia |
| C. | Both A and B |
| D. | None of the above parameters, and has a constant value of 0.61 |
| Answer» D. None of the above parameters, and has a constant value of 0.61 | |
| 223. |
The valve commonly used in pipes larger than 2" dia is a%! |
| A. | Globe valve |
| B. | Plug-cock |
| C. | Gate valve |
| D. | Check valve |
| Answer» D. Check valve | |
| 224. |
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is%! |
| A. | 4(Ro-Ri) |
| B. | ‚à ö(Ro-Ri) |
| C. | 2(Ro-Ri) |
| D. | Ro + Ri |
| Answer» D. Ro + Ri | |
| 225. |
Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.%! |
| A. | Increase |
| B. | Decrease |
| C. | Not change |
| D. | Exponentially decrease |
| Answer» B. Decrease | |
| 226. |
When the momentum of one fluid is used for moving another fluid, such a device is called a/an%! |
| A. | Jet pump |
| B. | Blower |
| C. | Acid egg |
| D. | None of these |
| Answer» B. Blower | |
| 227. |
Centre of pressure in an immersed body is __________ the centre of gravity.%! |
| A. | Above |
| B. | Below |
| C. | At |
| D. | Either above or below; depends on the liquid density |
| Answer» C. At | |
| 228. |
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.%! |
| A. | Size |
| B. | Surface properties |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 229. |
Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.%! |
| A. | Total pressure |
| B. | Total energy |
| C. | Velocity head |
| D. | None of these |
| Answer» C. Velocity head | |
| 230. |
Steady flow occurs, when the%! |
| A. | Conditions change steadily with time |
| B. | Conditions are the same at the adjacent points at any instant |
| C. | Conditions do not change with time at any point |
| D. | Rate of the velocity change is constant |
| Answer» D. Rate of the velocity change is constant | |
| 231. |
The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop fo __________ fluid.%! |
| A. | Dilatant |
| B. | Pseudoplastic |
| C. | Bingham plastic |
| D. | Newtonion |
| Answer» B. Pseudoplastic | |
| 232. |
Which of the following is not a dimension-less parameter?%! |
| A. | Euler number |
| B. | Specific gravity |
| C. | Fanning friction factor |
| D. | None of these |
| Answer» E. | |
| 233. |
The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.%! |
| A. | Hyperbola |
| B. | Parabola |
| C. | Semi-circle |
| D. | Semi-ellipse |
| Answer» C. Semi-circle | |
| 234. |
The temperature in isentropic flow%! |
| A. | Does not depend on Mach number |
| B. | Depends on Mach number only |
| C. | Cannot drop and then increase again downstream |
| D. | None of these |
| Answer» C. Cannot drop and then increase again downstream | |
| 235. |
A piezometer opening measures the __________ fluid pressure.%! |
| A. | Static |
| B. | Undisturbed |
| C. | Total |
| D. | Dynamic |
| Answer» C. Total | |
| 236. |
The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.%! |
| A. | Inlet tip of a blade curves in a direction opposite to that |
| B. | Outlet tip of a blade curves in a direction opposite to that |
| C. | Inlet tip of a blade is towards the direction |
| D. | Outlet tip of a blade is towards the direction |
| Answer» E. | |
| 237. |
Which of the following exemplifies a three dimensional fluid flow ?%! |
| A. | Fluid flow at the inlet to a nozzle |
| B. | Fluid flow between parallel plates |
| C. | Viscous fluid flow between converging plates |
| D. | None of these |
| Answer» B. Fluid flow between parallel plates | |
| 238. |
*$_Diaphragm pumps are used to transport? |
| A. | Solids |
| B. | Liquids |
| C. | Fluids |
| D. | Slurries |
| Answer» E. | |
| 239. |
*$_Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of? |
| A. | Powder & grannular solids |
| B. | Liquids |
| C. | Low melting point semi-solids |
| D. | All of the above |
| Answer» E. | |
| 240. |
*$_The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides 'x' & 'y' is given by? |
| A. | 2xy/(x+y) |
| B. | xy/(x+y) |
| C. | (x+y)/2xy |
| D. | (x+y)/xy |
| Answer» B. xy/(x+y) | |
| 241. |
*$_Potential flow is the flow of? |
| A. | Compressible fluids with shear |
| B. | Compressible fluids with no shear |
| C. | Incompressible fluids with shear |
| D. | Incompressible fluids with no shear |
| Answer» E. | |
| 242. |
*$_Net positive suction head (NPSH) of a centrifugal pump must be? |
| A. | Greater than the vapour pressure of the liquid |
| B. | Less than the vapour pressure of the liquid |
| C. | Equal to the vapour pressure of the liquid |
| D. | Less than barometric pressure |
| Answer» B. Less than the vapour pressure of the liquid | |
| 243. |
*$_The capacity of a centrifugal pump Can be increased by increasing the? |
| A. | Impeller diameter or speed |
| B. | Number of pumps and joining them in series |
| C. | Number of pumps and joining them in parallel |
| D. | All of the above |
| Answer» E. | |
| 244. |
*$_For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.? |
| A. | Brings about no further reduction of |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» B. Increases | |
| 245. |
*$_What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» B. 1 | |
| 246. |
*$_The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is? |
| A. | < 1 |
| B. | 1 |
| C. | > 1 |
| D. | 2 |
| Answer» B. 1 | |
| 247. |
*$_Specific speed for a centrifugal pump is? |
| A. | N‚à öQ/H3/4 |
| B. | N‚à öQ/H2/3 |
| C. | N‚à öQ/H1/4 |
| D. | N‚à öQ/H |
| Answer» B. N‚Äö√ √∂Q/H2/3 | |
| 248. |
*$_For laminar flow of Newtonion fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship.? |
| A. | Logarithmic |
| B. | Parabolic |
| C. | Hyperbolic |
| D. | Linear |
| Answer» C. Hyperbolic | |
| 249. |
*$_When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an? |
| A. | Ejector |
| B. | Blower |
| C. | Injector |
| D. | Airlift |
| Answer» E. | |
| 250. |
*$_Air vessel provided in a reciprocating pump? |
| A. | Smoothens the flow by avoiding pulsations |
| B. | Increases the volumetric efficiency of the pump |
| C. | Saves the pump from the danger of cavitation |
| D. | None of these |
| Answer» E. | |