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.
| 301. |
*$_Which of the following is not dimension-less?? |
| A. | Froude number |
| B. | Kinematic viscosity |
| C. | Pressure co-efficient |
| D. | None of these |
| Answer» C. Pressure co-efficient | |
| 302. |
*/*_Which is the most efficient and best for measuring very small flow rate of gases?? |
| A. | Venturimeter |
| B. | Orifice meter |
| C. | Rotameter |
| D. | Flow nozzle |
| Answer» D. Flow nozzle | |
| 303. |
*/*_Pressure drop in a packed bed for laminar flow is given by the __________ equation.? |
| A. | Kozney-Karman |
| B. | Blake-Plummer |
| C. | Leva's |
| D. | Fanning friction factor |
| Answer» B. Blake-Plummer | |
| 304. |
*/*_The dimension of dynamic viscosity is? |
| A. | ML⁻¹T⁻¹ |
| B. | L²T⁻¹ |
| C. | LT⁻² |
| D. | ML⁻¹T⁻² |
| Answer» B. L¬¨‚â§T‚Äö√Ö¬™¬¨œÄ | |
| 305. |
*/*_Slugging in a fluidised bed can be avoided by using? |
| A. | Tall narrow vessel |
| B. | Deep bed of solids |
| C. | Shallow beds of solids and proper choice of particle size |
| D. | Very large particles |
| Answer» D. Very large particles | |
| 306. |
*/*_With increasing flow rate, the hydraulic efficiency of a centrifugal pump? |
| A. | Monotonically decreases |
| B. | Decreases and then increases |
| C. | Remains constant |
| D. | Increases and then decreases |
| Answer» B. Decreases and then increases | |
| 307. |
*/*_A gas (density = 1.5 kg/m³ , viscosity = 2x 10⁻⁵ kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5kg/m³and viscosity of 3 x 10⁻⁵kg/m.s flowing at 3 m/s will be? |
| A. | 8400 Pa/m |
| B. | 12600 Pa/m |
| C. | 18900 Pa/m |
| D. | 16800 Pa/m |
| Answer» C. 18900 Pa/m | |
| 308. |
*/*_Gear pump? |
| A. | Is a positive displacement pump |
| B. | Is a centrifugal pump |
| C. | Is a non-positive displacement pump |
| D. | Can be started with delivery valve closed |
| Answer» B. Is a centrifugal pump | |
| 309. |
*/*_What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?? |
| A. | 0.5 |
| B. | 0.67 |
| C. | 1 |
| D. | 2 |
| Answer» E. | |
| 310. |
*/*_Froude number is not a factor? |
| A. | For Reynolds number greater than 300 |
| B. | When there is no vortex formation |
| C. | For unbaffled tank |
| D. | None of these |
| Answer» C. For unbaffled tank | |
| 311. |
*/*_For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is? |
| A. | More |
| B. | Less |
| C. | Equal |
| D. | More or less, depending on the type of particle |
| Answer» B. Less | |
| 312. |
*/*_What is the pipe called which lifts water from a reservoir to a greater height than the initial level in the supply reservoir?? |
| A. | Penstock |
| B. | Siphon |
| C. | Tunnel |
| D. | Pressure pipeline |
| Answer» C. Tunnel | |
| 313. |
*/*_The valve used for very remote and accurate control of fluid is a __________ valve.? |
| A. | Needle |
| B. | Globe |
| C. | Gate |
| D. | Butterfly |
| Answer» B. Globe | |
| 314. |
*/*_Priming is needed in a __________ pump.? |
| A. | Reciprocating |
| B. | Gear |
| C. | Centrifugal |
| D. | Diaphragm |
| Answer» D. Diaphragm | |
| 315. |
*/*_A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation?? |
| A. | Inertial and drag forces are important |
| B. | Drag, gravitational and buoyancy forces are impportant |
| C. | Drag force and gravitational forces are important |
| D. | None of the above |
| Answer» C. Drag force and gravitational forces are important | |
| 316. |
*/*_The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.? |
| A. | Elevation |
| B. | Velocity |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» C. Both A and B | |
| 317. |
*/*_Drag force on the float of a rotameter is(where Q = flow rate of the )? |
| A. | ‚Äö√ √πQ |
| B. | ‚à ù‚à öQ |
| C. | ‚à ùQ¬≤ |
| D. | Constant |
| Answer» E. | |
| 318. |
*/*_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 | |
| 319. |
*/*_Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an? |
| A. | Pitot tube |
| B. | Venturimeter |
| C. | Orificemeter |
| D. | Rotameter |
| Answer» B. Venturimeter | |
| 320. |
*/*_Cavitation in a centrifugal pump results from? |
| A. | High discharge pressure |
| B. | Low barometric pressure |
| C. | High discharge velocity |
| D. | High discharge rate |
| Answer» C. High discharge velocity | |
| 321. |
*/*_The ratio of pressure forces to inertial forces is called the __________ number.? |
| A. | Froude |
| B. | Euler |
| C. | Reynold |
| D. | Mach |
| Answer» C. Reynold | |
| 322. |
*/*_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 | |
| 323. |
*/*_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 | |
| 324. |
*/*_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 | |
| 325. |
*/*_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 | |
| 326. |
*/*_With increase in molecular weight of the gas, the head developed by a centrifugal compressor will? |
| A. | Decrease |
| B. | Increase |
| C. | Remain same |
| D. | Unpredictable |
| Answer» B. Increase | |
| 327. |
*/*_In continuous fluidisation? |
| A. | Solids are completely entrained |
| B. | The pressure drop is less than that for batch fluidisation |
| C. | There is no entrainment of solids |
| D. | Velocity of the fluid is very small |
| Answer» B. The pressure drop is less than that for batch fluidisation | |
| 328. |
*/*_A centrifugal pump designed for handling water (μ = 1 cp) will deliver __________ when pumping a thicker oil (μ = 30 cp).? |
| A. | Less head & capacity |
| B. | More head |
| C. | More capacity |
| D. | Less head & more capacity |
| Answer» B. More head | |
| 329. |
*/*_The momentum correction factor for the velocity distribution of laminar flow is? |
| A. | 1.3 |
| B. | 1.66 |
| C. | 2.5 |
| D. | None of these |
| Answer» E. | |
| 330. |
*/*_A stream tube is that, which has __________ cross-section entirely bounded by stream lines.? |
| A. | A circular |
| B. | Any convenient |
| C. | A small |
| D. | A large |
| Answer» C. A small | |
| 331. |
*/*_Which is not a variable head meter?? |
| A. | Venturimeter |
| B. | Pitot tube |
| C. | Rotameter |
| D. | None of these |
| Answer» D. None of these | |
| 332. |
*/*_The value of critical Reynolds number for pipe flow is? |
| A. | 1300 |
| B. | 10,000 |
| C. | 100,000 |
| D. | None of these |
| Answer» B. 10,000 | |
| 333. |
*/*_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 | |
| 334. |
*/*_Water is flowing at 1 m/sec through a pipe (of 10 cm I.D) with a right angle bend. The force in Newtons exerted on the bend by water is? |
| A. | 10‚à ö2œÄ |
| B. | 5π/2 |
| C. | 5‚à ö2œÄ |
| D. | 5œÄ/‚à ö2 |
| Answer» C. 5‚Äö√ √∂2≈ì√Ñ | |
| 335. |
*/*_In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of? |
| A. | Relative roughness |
| B. | Absolute roughness |
| C. | Friction co-efficient for flows at equal Reynold number |
| D. | All of the above |
| Answer» D. All of the above | |
| 336. |
*/*_Momentum transfer in laminar flow of fluids results due to the? |
| A. | Viscosity |
| B. | Density |
| C. | Velocity gradient |
| D. | None of these |
| Answer» D. None of these | |
| 337. |
*/*_Volute type of casing is provided in a centrifugal pump to? |
| A. | Convert velocity head to pressure head |
| B. | Convert pressure head to velocity head |
| C. | Reduce the discharge fluctuation |
| D. | Increase the discharge |
| Answer» E. | |
| 338. |
*/*_Multistage compressors are used in industry, because they? |
| A. | Reduce the cost of compressor |
| B. | Reduce the size requirement |
| C. | Resemble closely to isothermal compression |
| D. | Are easy to control |
| Answer» D. Are easy to control | |
| 339. |
*/*_Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)? |
| A. | ηma x ηm x ηv = ηo |
| B. | ηm = ηv . ηma |
| C. | ηma = ηm x ηv |
| D. | ηv = ηm x ηma |
| Answer» C. ≈í‚àëma = ≈í‚àëm x ≈í‚àëv | |
| 340. |
*/*_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 | |
| 341. |
*/*_At high Reynolds number? |
| A. | Inertial forces control and viscous forces are unimportant |
| B. | Viscous forces predominate |
| C. | Inertial forces are unimportant and viscous forces control |
| D. | None of these |
| Answer» B. Viscous forces predominate | |
| 342. |
*/*_Capacity of a rotary gear pump can be varied by? |
| A. | Changing the speed of rotation |
| B. | Bleeding air into suction |
| C. | Bypassing liquid from the suction or discharge line |
| D. | All of the above |
| Answer» E. | |
| 343. |
*/*_The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is? |
| A. | 0.3 |
| B. | 0.9 |
| C. | 0.03 |
| D. | 0.66 |
| Answer» B. 0.9 | |
| 344. |
*/*_An ideal fluid is? |
| A. | Non-viscous |
| B. | Incompressible |
| C. | Both A & B |
| D. | Neither A & B |
| Answer» D. Neither A & B | |
| 345. |
*/*_A gas? |
| A. | Signifies absence of density |
| B. | Can resist shearing action |
| C. | Is incompressible |
| D. | Is a supercritical vapor |
| Answer» E. | |
| 346. |
*/*_Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump.? |
| A. | Reciprocating |
| B. | Plunger |
| C. | Electromagnetic |
| D. | Gear |
| Answer» D. Gear | |
| 347. |
*/*_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 | |
| 348. |
*/*_The schedule number of a pipe is an indication of its? |
| A. | Size |
| B. | Roughness |
| C. | Material density |
| D. | Wall thickness |
| Answer» E. | |
| 349. |
*/*_Which of the following may be termed as a variable orifice flowmeter?? |
| A. | Rotameter |
| B. | Pitot tube |
| C. | V-notch |
| D. | All of the above |
| Answer» B. Pitot tube | |
| 350. |
*/*_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 | |