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.
| 601. |
A Venturimeter measures the___________________? |
| A. | Velocity head |
| B. | Pressure |
| C. | Point velocity |
| D. | None of these |
| Answer» E. | |
| 602. |
A tube is specified by its____________________? |
| A. | Thickness only |
| B. | Outer diameter only |
| C. | Thickness & outer diameter both |
| D. | Inner diameter |
| Answer» D. Inner diameter | |
| 603. |
A streamline is_________________? |
| A. | The line connecting the mid-points of flow cross-sections |
| B. | Defined for uniform flow only |
| C. | Drawn normal to the velocity vector at every point |
| D. | Always the path of a particle |
| Answer» D. Always the path of a particle | |
| 604. |
A streamline is a line in flow field _________________? |
| A. | That is traced by all the fluid particles passing through a given point |
| B. | Along which a fluid particle travels |
| C. | Such that at every point on it, the velocity is tangential to it |
| D. | None of these |
| Answer» D. None of these | |
| 605. |
A stream line is___________________? |
| A. | Fixed in space in steady flow |
| B. | Always the path of particle |
| C. | Drawn normal to the velocity vector at every point |
| D. | A line connecting the mid points of flow cross-section |
| Answer» B. Always the path of particle | |
| 606. |
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 | |
| 607. |
A special type of liquid transporting device is the diffuser pump, in which _____________ are minimised? |
| A. | Bearing losses |
| B. | Disk friction |
| C. | Shock losses |
| D. | Cavitation |
| Answer» D. Cavitation | |
| 608. |
A Rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and Rotameter shows the same reading, the flow rate (cc/sec) is__________________? |
| A. | 26 |
| B. | 42 |
| C. | 269 |
| D. | 325 |
| Answer» D. 325 | |
| 609. |
A Rotameter works on the principle of _______________ pressure drop? |
| A. | Constant |
| B. | Variable |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» B. Variable | |
| 610. |
A relief valve__________________? |
| A. | Provides back pressure for a cylinder |
| B. | Unloads a pump |
| C. | Is a directional control valve |
| D. | None of these |
| Answer» D. None of these | |
| 611. |
A rectangular surface 3′ × 4′, has the lower 3 edge horizontal and 6′ below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) ? |
| A. | 39.6y |
| B. | 39.6y |
| C. | 49.2y |
| D. | 58y |
| Answer» C. 49.2y | |
| 612. |
A pump operating under specific conditions delivers insufficient quantity of liquid. This may be set right by________________? |
| A. | Decreasing the size of the inlet pipe |
| B. | Increasing the size of the inlet pipe |
| C. | Lowering the pump position |
| D. | Both B. and C. |
| Answer» E. | |
| 613. |
A pressure of 10 m head of water is equivalent to ______________ kN/m2? |
| A. | 98 |
| B. | 147 |
| C. | 196 |
| D. | 49 |
| Answer» B. 147 | |
| 614. |
A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be__________________? |
| A. | 100 |
| B. | 200 |
| C. | 320 |
| D. | 160 |
| Answer» C. 320 | |
| 615. |
A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is___________________? |
| A. | 5 |
| B. | 14.1 |
| C. | 56.22 |
| D. | 28.2 |
| Answer» E. | |
| 616. |
A pitched-blade turbine draws ______________ a straight blade turbine? |
| A. | Less power than |
| B. | More power than |
| C. | Same power as |
| D. | Data insufficient to predict |
| Answer» B. More power than | |
| 617. |
A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is__________________? |
| A. | 20 m/sec |
| B. | 10 m/sec |
| C. | 5 √2 m/sec |
| D. | 5 m/sec |
| Answer» C. 5 √2 m/sec | |
| 618. |
A pipe is defined as ‘hydraulically smooth’, if the friction factor_________________? |
| A. | Is not a function of Reynolds number |
| B. | For a given Reynolds number remains constant even on further smoothening of the pipe |
| C. | Is zero irrespective of the Reynolds number |
| D. | None of these |
| Answer» C. Is zero irrespective of the Reynolds number | |
| 619. |
A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ? |
| A. | VX = V0 + q (x3/L2D) |
| B. | VX = V0 + ⅓q (x3/L2) |
| C. | VX = V0 + 2q (x2/LD) |
| D. | VX = V0 + (4/3) q (x3/L2D) |
| Answer» E. | |
| 620. |
A piezometer provided in the pipe measures__________________? |
| A. | Friction factor |
| B. | Static pressure |
| C. | Dynamic pressure |
| D. | None of these |
| Answer» C. Dynamic pressure | |
| 621. |
A piezometer opening measures the _____________ fluid pressure? |
| A. | Static |
| B. | Undisturbed |
| C. | Total |
| D. | Dynamic |
| Answer» C. Total | |
| 622. |
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke’s law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity ? |
| A. | Same as that of A |
| B. | One fourth as that of A |
| C. | Twice as that of A |
| D. | Four times as that of A |
| Answer» C. Twice as that of A | |
| 623. |
A Newtonian liquid (ρ = density, μ = viscosity) is flowing with velocity „v‟ in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to_________________? |
| A. | Lρv2/D |
| B. | LμV/D2 |
| C. | Dρv2/L |
| D. | μV/L |
| Answer» B. LμV/D2 | |
| 624. |
A Newtonian fluid is that__________________? |
| A. | Which follows Newton’s law of motion |
| B. | Which needs a minimum shear, before it starts deforming |
| C. | For which shear & deformation are related as T = μ (∂u/∂y) |
| D. | None of these |
| Answer» D. None of these | |
| 625. |
A mono pump is a __________ pump ? |
| A. | Centrifugal |
| B. | Piston |
| C. | Positive acting rotary |
| D. | A group of vacuum |
| Answer» D. A group of vacuum | |
| 626. |
A mixed flow centrifugal pump_______________________? |
| A. | Employs such an impeller, through which the flow is a combination of radial & axial flow |
| B. | Mixes the two fluids before pumping them |
| C. | Pumps the two fluids separately and then mixes them |
| D. | Employs impellers in both the radial & axial directions |
| Answer» B. Mixes the two fluids before pumping them | |
| 627. |
A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be _______________ cms? |
| A. | 17 |
| B. | 42 |
| C. | 84 |
| D. | 1.8 |
| Answer» B. 42 | |
| 628. |
A lubricant 100 times more viscous than water would have a viscosity (in Pa.s) ? |
| A. | 0.01 |
| B. | 0.1 |
| C. | 1 |
| D. | 10 |
| Answer» C. 1 | |
| 629. |
A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is _____________ litres? |
| A. | 600 |
| B. | 660 |
| C. | 1.1 |
| D. | 60 |
| Answer» C. 1.1 | |
| 630. |
A hydraulic ram acts as a/an ______________ pump? |
| A. | Centrifugal |
| B. | Reciprocating |
| C. | Impulse |
| D. | Parallel cylinder |
| Answer» D. Parallel cylinder | |
| 631. |
A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is _____________ kg? |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 10000 |
| Answer» C. 1000 | |
| 632. |
A hydraulic accumulator comprises of__________________? |
| A. | A storage device and a control valve |
| B. | A cylinder and a plunger |
| C. | Two pistons and two cylinders |
| D. | A storage tank and a ram pump |
| Answer» C. Two pistons and two cylinders | |
| 633. |
A globe valve is the most suitable for applications, in which____________________? |
| A. | Fluid flow control is required |
| B. | Fluid contains dispersed solid particles |
| C. | Valve is required to be either fully open or fully closed |
| D. | One way flow is required |
| Answer» B. Fluid contains dispersed solid particles | |
| 634. |
A gas (density = 1.5 kg/m3, viscosity = 2 × 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 1.5 kg/m3and viscosity of 3 × 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 | |
| 635. |
A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid? |
| A. | Newtonian |
| B. | Viscous |
| C. | Dilatant |
| D. | Non-viscous |
| Answer» D. Non-viscous | |
| 636. |
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. | Newtonian |
| B. | Non-Newtonian |
| C. | Ideal |
| D. | Incompressible |
| Answer» B. Non-Newtonian | |
| 637. |
A fluid is the one, which___________________? |
| A. | Cannot remain at rest under the action of shear force |
| B. | Continuously expands till it fills any container |
| C. | Is incompressible |
| D. | Permanently resists distortion |
| Answer» B. Continuously expands till it fills any container | |
| 638. |
A fluid is a substance, that_________________? |
| A. | Has to be kept in a closed container |
| B. | Is almost incompressible |
| C. | Has zero shear stress |
| D. | Flows when even a small shear is applied to it |
| Answer» E. | |
| 639. |
A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is _____________ hp? |
| A. | 1 |
| B. | 10/55 |
| C. | 5.5 |
| D. | 1/55 |
| Answer» B. 10/55 | |
| 640. |
A fluid element has a velocity V = -y2. xi + 2yx2 . j. The motion at (x, y) = (1/√2, 1) is_________________? |
| A. | Rotational and incompressible |
| B. | Rotational and compressible |
| C. | Irrotational and compressible |
| D. | Irrotational and incompressible |
| Answer» C. Irrotational and compressible | |
| 641. |
A fluid (μ/ρ) = 0.01 cm2/sec is moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is _______________ cm/sec? |
| A. | 7 |
| B. | 700 |
| C. | 7000 |
| D. | 630 |
| Answer» B. 700 | |
| 642. |
A floating/submerged body is always stable, if its centre of gravity___________________? |
| A. | Lies above its centre of buoyancy |
| B. | And centre of buoyancy coincide |
| C. | Lies below its centre of buoyancy |
| D. | Lies above its metacentre |
| Answer» D. Lies above its metacentre | |
| 643. |
A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double___________________? |
| A. | Head |
| B. | Discharge |
| C. | Efficiency |
| D. | None of these |
| Answer» C. Efficiency | |
| 644. |
A differential pressure cell is used for____________________________? |
| A. | Measuring small pressure difference in gases |
| B. | Measuring small pressure difference in liquids |
| C. | Remote recording of pressure difference |
| D. | Measuring the difference of the impact & the static pressure |
| Answer» D. Measuring the difference of the impact & the static pressure | |
| 645. |
A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a ____________ pump? |
| A. | Sump |
| B. | Volute |
| C. | Vacuum |
| D. | Submerged |
| Answer» D. Submerged | |
| 646. |
A centrifugal pump loses prime after starting. The reason of this trouble may be_____________________? |
| A. | Incomplete priming |
| B. | Too high a suction lift |
| C. | Low available NPSH and air leaks in the suction pipe |
| D. | All A., B., and C. |
| Answer» E. | |
| 647. |
A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the power consumed now will be _____________ hp? |
| A. | 0.5 |
| B. | 2 |
| C. | 4 |
| D. | 1 |
| Answer» B. 2 | |
| 648. |
A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now_________________? |
| A. | Increase |
| B. | Decrease |
| C. | Remain same |
| D. | Data insufficient to predict |
| Answer» C. Remain same | |
| 649. |
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ? |
| A. | 10 m |
| B. | 11 m |
| C. | 11.8 m |
| D. | 30 m |
| Answer» C. 11.8 m | |
| 650. |
A centrifugal pump is called a turbine pump, if it is having a_________________? |
| A. | Turbine type impeller |
| B. | Vaned diffusion casing |
| C. | Rotating vaned volute |
| D. | None of these |
| Answer» C. Rotating vaned volute | |