MCQOPTIONS
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MCQOPTIONS
This section includes 659 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 equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the _____________ equation? |
| A. | Nikuradse |
| B. | Von-Karman |
| C. | Blasius |
| D. | Colebrook |
| Answer» B. Von-Karman | |
| 202. |
The equation f-0.5 = 4.07 loge (NRe √f)-0.6 is called the ____________? |
| A. | Colebrook formula |
| B. | Von-Karman equation |
| C. | Fanning equation |
| D. | None of these |
| Answer» C. Fanning equation | |
| 203. |
The energy equation, E + (p/ρ) + (V2/2g) + gZ = constant (E = internal energy/mass), is applicable to___________________? |
| A. | Perfect gases only |
| B. | Isothermal flow of gases |
| C. | Adiabatic unsteady flow of gases |
| D. | All compressible fluids |
| Answer» E. | |
| 204. |
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow? |
| A. | Directly proportional to |
| B. | Directly proportional to square of |
| C. | Inversely proportional to |
| D. | Inversely proportional to square of |
| Answer» C. Inversely proportional to | |
| 205. |
The energy loss in flow through Venturimeter 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. |
The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids ? |
| A. | Having high viscosities |
| B. | Moving at low velocities |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 207. |
The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s) ? |
| A. | 24000 |
| B. | 24 |
| C. | 0.24 |
| D. | 0.44 |
| Answer» E. | |
| 208. |
The distribution of shear stress in a stream of fluid in a circular tube is_____________________? |
| A. | Linear with radius for turbulent flow only |
| B. | Linear with radius for laminar flow only |
| C. | Linear with radius for both laminar & turbulent flow |
| D. | Parabolic with radius for both laminar & turbulent flow |
| Answer» D. Parabolic with radius for both laminar & turbulent flow | |
| 209. |
The distance between metacentre and ______________ is called metacentric height? |
| A. | Water surface |
| B. | Centre of gravity |
| C. | Centre of buoyancy |
| D. | None of these |
| Answer» C. Centre of buoyancy | |
| 210. |
The discharge through a Venturimeter depends upon _________________? |
| A. | Pressure drop only |
| B. | Its orientation |
| C. | Co-efficient of contraction only |
| D. | None of these |
| Answer» B. Its orientation | |
| 211. |
The discharge through a V-notch weir varies as___________________? |
| A. | H3/2 |
| B. | H1/2 |
| C. | H5/2 |
| D. | H2/3 |
| Answer» D. H2/3 | |
| 212. |
The discharge through a semi-circular weir varies as (where, H = Head of liquid.) ? |
| A. | H |
| B. | H2 |
| C. | H3/2 |
| D. | H1/2 |
| Answer» C. H3/2 | |
| 213. |
The discharge through a rectangular weir varies as ___________________? |
| A. | H1/2 |
| B. | H5/2 |
| C. | H2/5 |
| D. | H3/2 |
| Answer» E. | |
| 214. |
The discharge co-efficient for an orifice meter does not depend upon the ___________________? |
| A. | Pipe length |
| B. | Ratio of pipe diameter to orifice diameter |
| C. | Type of orifice & the Reynolds number |
| D. | Pipe diameter |
| Answer» B. Ratio of pipe diameter to orifice diameter | |
| 215. |
The dimension of surface tension is________________? |
| A. | ML-2 |
| B. | MT-2 |
| C. | MLT-2 |
| D. | ML-2T |
| Answer» C. MLT-2 | |
| 216. |
The dimension of kinematic viscosity is_________________? |
| A. | ML-2T-1 |
| B. | L2T-1 |
| C. | ML-2T-2 |
| D. | None of these |
| Answer» C. ML-2T-2 | |
| 217. |
The dimension of dynamic viscosity is__________________? |
| A. | ML-1T-1 |
| B. | L2T-1 |
| C. | LT-2 |
| D. | ML-1T-2 |
| Answer» B. L2T-1 | |
| 218. |
The curve of metacentre for a floating body ____________ the curve of buoyancy? |
| A. | Is always below |
| B. | Is the evolute of |
| C. | Intersects at right angle |
| D. | Is tangential to |
| Answer» C. Intersects at right angle | |
| 219. |
The contraction co-efficient for Borda’s mouthpiece (for frictionless fluid) is__________________? |
| A. | 0.1 |
| B. | 0.5 |
| C. | 0.94 |
| D. | 1 |
| Answer» C. 0.94 | |
| 220. |
The continuity equation__________________? |
| A. | Relates mass flow rate along a stream tube |
| B. | Relates work and energy |
| C. | Stipulates that Newton’s second law of motion must be satisfied at every point in the fluid |
| D. | None of these |
| Answer» B. Relates work and energy | |
| 221. |
The continuity equation___________________? |
| A. | Is independent of the compressibility of the fluid |
| B. | Is dependent upon the viscosity of the fluid |
| C. | Represents the conservation of mass |
| D. | None of these |
| Answer» D. None of these | |
| 222. |
The continuity equation of fluid mechanics utilises the principle of conservation of _________________? |
| A. | Momentum |
| B. | Mass |
| C. | Energy |
| D. | Both B. & C. |
| Answer» C. Energy | |
| 223. |
The continuity equation in ideal fluid flow states that__________________? |
| A. | Net rate of inflow into any small volume must be zero |
| B. | Energy is not constant along a streamline |
| C. | Energy is constant along a streamline |
| D. | There exists a velocity potential |
| Answer» B. Energy is not constant along a streamline | |
| 224. |
The component of acceleration resulting due to unsteady nature of flow is called ____________ acceleration? |
| A. | Normal |
| B. | Local |
| C. | Convective |
| D. | Tangential |
| Answer» C. Convective | |
| 225. |
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 | |
| 226. |
The co-efficient of drag and lift for an incompressible fluid depends on the_________________? |
| A. | Reynolds number |
| B. | Froude number |
| C. | Mach number |
| D. | All A., B. and C. |
| Answer» B. Froude number | |
| 227. |
The centre of pressure is_________________? |
| A. | Always below the centroid of the area |
| B. | Always above the centroid of the area |
| C. | A point on the line of action of the resultant force |
| D. | At the centroid of the submerged area |
| Answer» D. At the centroid of the submerged area | |
| 228. |
The capillary rise of mercury is maximum in glass tube of dia _____________ mm? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 5 |
| Answer» B. 1 | |
| 229. |
The capacity of an accumulator is the maximum_________________? |
| A. | Energy which it can store |
| B. | Discharge which it can deliver |
| C. | Liquid which it can store |
| D. | None of these |
| Answer» B. Discharge which it can deliver | |
| 230. |
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 A., B. and C. |
| Answer» E. | |
| 231. |
The buoyant force acting on a floating body is dependent on the _______________? |
| A. | Viscosity of the liquid |
| B. | Weight of the liquid displaced |
| C. | Depth of immersion of the body |
| D. | Surface tension of the liquid |
| Answer» C. Depth of immersion of the body | |
| 232. |
The bulk modulus of elasticity of a liquid__________________? |
| A. | Is zero for incompressible liquid |
| B. | Decreases with pressure |
| C. | Is independent of temperature & pressure |
| D. | Increases with pressure |
| Answer» E. | |
| 233. |
The boundary layer thickness at a given section along a flat plate _____________ with increasing Reynold’s number? |
| A. | Increases |
| B. | Decreases |
| C. | Remain same |
| D. | May increase or decrease |
| Answer» C. Remain same | |
| 234. |
The boundary layer is that part of a moving fluid, in which the fluid velocity is_________________? |
| A. | Affected by the fluid flow pressure |
| B. | Constant |
| C. | Affected by the presence of a solid boundary |
| D. | All A., B. and C. |
| Answer» D. All A., B. and C. | |
| 235. |
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. | |
| 236. |
The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by_____________________? |
| A. | Cv . √(2gH) |
| B. | Cc . √(2gH) |
| C. | Cd . √(2gH) |
| D. | Cv . Va |
| Answer» B. Cc . √(2gH) | |
| 237. |
Schedule number of a pipe, which is a measure of its wall thickness, is given by ________________? |
| A. | 1000 P’/S |
| B. | 100 P’/S |
| C. | 1000 S/P’ |
| D. | 10000 P’/S |
| Answer» B. 100 P’/S | |
| 238. |
Scale up of agitator design requires________________? |
| A. | Geometrical similarity only |
| B. | Dynamic similarity only |
| C. | Both geometrical and dynamic similarity |
| D. | All geometrical, dynamic and kinematic similarity |
| Answer» E. | |
| 239. |
Rubber latex is an example of ______________ fluid? |
| A. | Dilatants |
| B. | Newtonian |
| C. | Pseudo plastic |
| D. | Bingham plastic |
| Answer» D. Bingham plastic | |
| 240. |
Rubber latex is an example of a ______________ fluid? |
| A. | Pseudo plastic |
| B. | Bingham plastic |
| C. | Dilatent |
| D. | Newtonian |
| Answer» B. Bingham plastic | |
| 241. |
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg ? |
| A. | 1 |
| B. | 0.1 |
| C. | 0.01 |
| D. | 0.001 |
| Answer» D. 0.001 | |
| 242. |
Rise of liquid in a capillary tube is due to_________________? |
| A. | Cohesion |
| B. | Adhesion |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 243. |
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________? |
| A. | Increase |
| B. | Decrease |
| C. | Remain same |
| D. | Data insufficient to predict pressure drop |
| Answer» B. Decrease | |
| 244. |
Reynolds number is the ratio of____________________? |
| A. | Viscous forces to gravity forces |
| B. | Inertial forces to viscous forces |
| C. | Viscous forces to inertial forces |
| D. | Inertial forces to gravity forces |
| Answer» C. Viscous forces to inertial forces | |
| 245. |
Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________? |
| A. | 2000 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» E. | |
| 246. |
Re/NFr is called the _____________ number? |
| A. | Brinkman |
| B. | Galileo |
| C. | Archimedes |
| D. | Euler |
| Answer» C. Archimedes | |
| 247. |
Remote control valve is a _______________ valve? |
| A. | Gate |
| B. | Butterfly |
| C. | Needle |
| D. | Globe |
| Answer» C. Needle | |
| 248. |
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have_____________? |
| A. | Very low speeds |
| B. | Smaller discharge |
| C. | Higher capital &maintenance cost |
| D. | High vibrations |
| Answer» D. High vibrations | |
| 249. |
Reciprocating pumps compared to centrifugal pumps__________________? |
| A. | Deliver liquid at uniform pressure |
| B. | Can handle slurries more efficiently |
| C. | Are not subject to air binding |
| D. | Can be operated with delivery valve closed |
| Answer» D. Can be operated with delivery valve closed | |
| 250. |
Ratio of inertial forces to surface tension forces is called the _____________ number? |
| A. | Euler |
| B. | Froude |
| C. | Mach |
| D. | Weber |
| Answer» E. | |