Fluid Mechanics For Chemical MCQs

Option A: Increases linearly with V

Option B: Decreases linearly with V

Option C: Decreases as V2

Option D: None of these

Correct Answer: Increases linearly with V ✔

Option A: Copper

Option B: Tungsten

Option C: Chromium

Option D: Aluminium

Correct Answer: Tungsten ✔

Option A: Inverse of fluid viscosity

Option B: Square of particle size

Option C: Difference in the densities of the particle & fluid

Option D: All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Option A: Weir

Option B: Pitot tube

Option C: Kennison nozzle

Option D: V-notch

Correct Answer: Pitot tube ✔

Option A: Is zero for incompressible liquid

Option B: Decreases with pressure

Option C: Is independent of temperature & pressure

Option D: Increases with pressure

Correct Answer: Increases with pressure ✔

Option A: 1/√M

Option B: √M

Option C: 1/M

Option D: M

Correct Answer: 1/√M ✔

Option A: Re

Option B: √Re

Option C: 1/Re

Option D: Re-1/2

Correct Answer: Re ✔

Option A: Minimising wall friction

Option B: Suppressing boundary layer separation

Option C: Both A. & B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. & B. ✔

Option A: 550 lbf.ft/second

Option B: 550 kgf.m/second

Option C: Both A. and B.

Option D: 550 lbf.ft./hr

Correct Answer: 550 lbf.ft/second ✔

Option A: 1/√T

Option B: 1/T

Option C: √T

Option D: T

Correct Answer: √T ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: Increases exponentially

Correct Answer: Decreases ✔

Option A: Increases the work done during delivery stroke

Option B: Decreases the work done during suction stroke

Option C: Does not change the work requirement of the pump

Option D: Increases the work done during suction stroke

Correct Answer: Does not change the work requirement of the pump ✔

Option A: Blower

Option B: Turbine

Option C: Centrifugal pump

Option D: Centrifugal fan

Correct Answer: Turbine ✔

Option A: Non-viscous

Option B: Incompressible

Option C: Both A. and B.

Option D: Having no motion of one fluid layer relative to the other

Correct Answer: Having no motion of one fluid layer relative to the other ✔

Option A: Is not a function of Reynolds number

Option B: For a given Reynolds number remains constant even on further smoothening of the pipe

Option C: Is zero irrespective of the Reynolds number

Option D: None of these

Correct Answer: For a given Reynolds number remains constant even on further smoothening of the pipe ✔

Option A: Fluid-particle interaction

Option B: Fluid flow through helical pipes

Option C: Power consumption in agitated vessels

Option D: Psychrometry

Correct Answer: Fluid flow through helical pipes ✔

Option A: 10

Option B: 100

Option C: 250

Option D: 1000

Correct Answer: 10 ✔

Option A: Speed

Option B: (Speed)2

Option C: (Speed)3

Option D: (Speed)0.5

Correct Answer: Speed ✔

Option A: ML-1T-1

Option B: L2T-1

Option C: LT-2

Option D: ML-1T-2

Correct Answer: ML-1T-1 ✔

Option A: Venturimeter

Option B: Orificemeter

Option C: Rotameter

Option D: Pitot tube

Correct Answer: Rotameter ✔

Option A: Relief

Option B: Three/four way

Option C: Pressure reducing

Option D: Directional control

Correct Answer: Directional control ✔

Option A: Capacity varies directly with

Option B: Head varies as the square of

Option C: Horsepower varies as the cube of

Option D: All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Option A: Relative roughness

Option B: Absolute roughness

Option C: Friction co-efficient for flows at equal Reynold number

Option D: All A., B. & C.

Correct Answer: Friction co-efficient for flows at equal Reynold number ✔

Option A: Parabolic

Option B: Flat

Option C: Flat near the wall and parabolic in the middle

Option D: Parabolic near the wall and flat in the middle

Correct Answer: Parabolic ✔

Option A: Jet pump

Option B: Blower

Option C: Acid egg

Option D: None of these

Correct Answer: Jet pump ✔

Option A: ∂/∂s = 0

Option B: ∂/∂t = 0

Option C: ∂/∂s = constant

Option D: ∂/∂t = constant

Correct Answer: ∂/∂t = 0 ✔

Option A: 1000 P’/S

Option B: 100 P’/S

Option C: 1000 S/P’

Option D: 10000 P’/S

Correct Answer: A. 1000 P’/S ✔

Option A: M is above G

Option B: M is below G

Option C: M & G coincide

Option D: None of these

Correct Answer: M is below G ✔

Option A: 4000

Option B: 2100

Option C: 1500

Option D: 3000

Correct Answer: 2100 ✔

Option A: Colebrook formula

Option B: Von-Karman equation

Option C: Fanning equation

Option D: None of these

Correct Answer: Von-Karman equation ✔

Option A: 10 KPa

Option B: 20 KPa

Option C: 30 KPa

Option D: 40 KPa

Correct Answer: 20 KPa ✔

Option A: Velocity at a point in the flow

Option B: Pressure at a point

Option C: Average flow velocity

Option D: Pressure difference in pipe flow

Correct Answer: Velocity at a point in the flow ✔

Option A: ML-1T-1

Option B: MLT-1

Option C: ML-1T

Option D: MLT

Correct Answer: ML-1T-1 ✔

Option A: Ensure intermittent supply of hydraulic pressure

Option B: Increase the pressure and store/ accumulate it

Option C: Accumulate pressure to increase force

Option D: Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

Correct Answer: Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc ✔

Option A: Inside diameter

Option B: Outside diameter

Option C: Thickness

Option D: None of these

Correct Answer: Outside diameter ✔

Option A: 0.64

Option B: 1.65

Option C: 0.32

Option D: 0.94

Correct Answer: 0.64 ✔

Option A: Vs/Dp2

Option B: Vs2/Dp2

Option C: Vs2/Dp3

Option D: Vs/Dp3

Correct Answer: Vs/Dp2 ✔

Option A: Minimum liquid cross-section

Option B: More diameter compared to orifice diameter

Option C: Minimum velocity of fluid stream

Option D: None of these

Correct Answer: Minimum liquid cross-section ✔

Option A: Static

Option B: Total

Option C: Difference in static & dynamic

Option D: All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Option A: kg/m. sec

Option B: N/m2

Option C: m2 /sec

Option D: m/N. sec

Correct Answer: kg/m. sec ✔

Option A: Less than

Option B: Same as

Option C: More than

Option D: Data insufficient, cannot be predicted

Correct Answer: More than ✔

Option A: Water at room temperature

Option B: Air at room temperature

Option C: Oxygen at room temperature

Option D: Nitrogen at room temperature

Correct Answer: Water at room temperature ✔

Option A: Smaller than

Option B: Larger than

Option C: Same as

Option D: Twice

Correct Answer: Smaller than ✔

Option A: Discharge

Option B: Suction

Option C: Suction minus vapor pressure of the liquid at suction temperature

Option D: Discharge minus vapor pressure of the liquid at the discharge temperature

Correct Answer: Suction ✔

Option A: √d

Option B: d2/3

Option C: d4/5

Option D: d1/3

Correct Answer: d4/5 ✔

Option A: Elastic

Option B: Viscous

Option C: Gravity

Option D: None of these

Correct Answer: Elastic ✔

Option A: (d1/d2)0.8

Option B: (d1/d2)0.5

Option C: d1/d2

Option D: (d1/d2)2

Correct Answer: (d1/d2)0.5 ✔

Option A: Viscosity

Option B: Density

Option C: Velocity gradient

Option D: None of these

Correct Answer: Velocity gradient ✔

Option A: Inlet pressure high

Option B: Outlet pressure low

Option C: Inlet pressure low

Option D: Outlet pressure high

Correct Answer: Inlet pressure high ✔

Option A: 2

Option B: 100

Option C: 2100

Option D: 700

Correct Answer: 2 ✔

Option A: Steady uniform

Option B: Steady non-uniform

Option C: Unsteady uniform

Option D: Unsteady non-uniform

Correct Answer: Steady non-uniform ✔

Option A: 0

Option B: 1

Option C: < 1

Option D: > 1

Correct Answer: 1 ✔

Option A: Viscosity

Option B: Specific volume

Option C: Velocity

Option D: None of these

Correct Answer: Specific volume ✔

Option A: Relates mass flow rate along a stream tube

Option B: Relates work and energy

Option C: Stipulates that Newton’s second law of motion must be satisfied at every point in the fluid

Option D: None of these

Correct Answer: Relates mass flow rate along a stream tube ✔

Option A: Has to be kept in a closed container

Option B: Is almost incompressible

Option C: Has zero shear stress

Option D: Flows when even a small shear is applied to it

Correct Answer: Flows when even a small shear is applied to it ✔

Option A: Size

Option B: Roughness

Option C: Material density

Option D: Wall thickness

Correct Answer: Wall thickness ✔

Option A: FL-1

Option B: F-1. L

Option C: F.L-2

Option D: F-2. L

Correct Answer: FL-1 ✔

Option A: Increase

Option B: Decrease

Option C: Remain same

Option D: Be quadrupled

Correct Answer: Increase ✔

Option A: Diaphragm

Option B: Reciprocating

Option C: Gear

Option D: Centrifugal

Correct Answer: Centrifugal ✔

Option A: Smaller than

Option B: Greater than

Option C: Equal to

Option D: Either A. or B.

Correct Answer: Smaller than ✔

Option A: Roughness of surface of the body

Option B: Pressure of main flow only

Option C: Length of the body in flow direction

Option D: All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Option A: Decreases

Option B: Increases

Option C: Remains unaltered

Option D: Can either increase or decrease; depends on other factors

Correct Answer: Increases ✔

Option A: Bingham

Option B: Newtonian

Option C: Perfect

Option D: None of these

Correct Answer: Newtonian ✔

Option A: Inner

Option B: Outer

Option C: Approximate

Option D: None of these

Correct Answer: Approximate ✔

Option A: Logarithmic

Option B: Parabolic

Option C: Hyperbolic

Option D: Linear

Correct Answer: Logarithmic ✔

Option A: 2 to 3

Option B: 0.01 to 0.10

Option C: 200 to 300

Option D: 100 to 1000

Correct Answer: 2 to 3 ✔

Option A: Cannot remain at rest under the action of shear force

Option B: Continuously expands till it fills any container

Option C: Is incompressible

Option D: Permanently resists distortion

Correct Answer: Cannot remain at rest under the action of shear force ✔

Option A: Euler number

Option B: Specific gravity

Option C: Fanning friction factor

Option D: None of these

Correct Answer: None of these ✔

Option A: Long pipe at constant rate

Option B: Long pipe at decreasing rate

Option C: Expanding tube at constant rate

Option D: None of these

Correct Answer: Long pipe at constant rate ✔

Option A: Monotonically decreases

Option B: Decreases and then increases

Option C: Remains constant

Option D: Increases and then decreases

Correct Answer: Monotonically decreases ✔

Option A: Weber

Option B: Mach

Option C: Euler

Option D: Froude

Correct Answer: Euler ✔

Option A: Sleeve joint

Option B: Coupling

Option C: Flange

Option D: Expansion joint

Correct Answer: Sleeve joint ✔

Option A: Is a positive displacement pump

Option B: Is a centrifugal pump

Option C: Is a non-positive displacement pump

Option D: Can be started with delivery valve closed

Correct Answer: Is a positive displacement pump ✔

Option A: Buoyancy = weight + drag

Option B: Weight = buoyancy + drag

Option C: Drag = buoyancy + weight

Option D: Drag = weight

Correct Answer: Weight = buoyancy + drag ✔

Option A: d

Option B: d2

Option C: d2.5

Option D: d4

Correct Answer: d ✔

Option A: Turbine

Option B: Propeller

Option C: Diffuser

Option D: None of these

Correct Answer: Propeller ✔

Option A: ε = ε0 + α.t

Option B: ε = ε0 + α.t2

Option C: ε = ε0 + α.t3

Option D: ε = ε0 + α.t4

Correct Answer: ε = ε0 + α.t ✔

Option A: 0.5

Option B: 1

Option C: 1.5

Option D: 2

Correct Answer: 2 ✔

Option A: Increase

Option B: Decrease

Option C: Remain same

Option D: Data insufficient to predict pressure drop

Correct Answer: Increase ✔

Option A: Weber number

Option B: Mach number

Option C: Euler number

Option D: Reynolds number

Correct Answer: Mach number ✔

Option A: 4.4 KPa

Option B: 2.94 KPa

Option C: 3.7 KPa

Option D: None of these

Correct Answer: 4.4 KPa ✔

Option A: Flow rate

Option B: Mean velocity

Option C: Both ‘a’ & ‘b’

Option D: Neither ‘a’ nor ‘b’

Correct Answer: Mean velocity ✔

Option A: d

Option B: 1/d

Option C: ζ

Option D: 1/ζ

Correct Answer: ζ ✔

Option A: Varies parabolically across the cross-section

Option B: Remains constant over the cross-section

Option C: Is zero at the centre and varies linearly with the radius

Option D: Is zero at the wall and increases linearly to the centre

Correct Answer: Is zero at the centre and varies linearly with the radius ✔

Option A: 90

Option B: 60

Option C: 45

Option D: 30

Correct Answer: 60 ✔

Option A: Reciprocating

Option B: Gear

Option C: Diaphragm

Option D: Centrifugal

Correct Answer: Diaphragm ✔

Option A: Fluid velocity decreases to zero

Option B: Total energy decreases

Option C: Both A. and B.

Option D: Flow pressure approaches its vapor pressure at the prevailing temperature

Correct Answer: Flow pressure approaches its vapor pressure at the prevailing temperature ✔

Option A: Suitably designing the pump

Option B: Maintaining the suction head sufficiently greater than the vapour pressure

Option C: Maintaining suction head = developed head

Option D: Maintaining suction head lower than the vapour pressure

Correct Answer: Maintaining the suction head sufficiently greater than the vapour pressure ✔

Option A: Dilatant

Option B: Bingham plastic

Option C: Pseudo plastic

Option D: None of these

Correct Answer: Bingham plastic ✔

Option A: Inertial forces control and viscous forces are unimportant

Option B: Viscous forces predominate

Option C: Inertial forces are unimportant and viscous forces control

Option D: None of these

Correct Answer: Inertial forces control and viscous forces are unimportant ✔

Option A: Back flow of fluid in the event of stoppage of pump

Option B: Discharge pressure

Option C: Flow of liquid during operation of the pump

Option D: All A., B. and C.

Correct Answer: Back flow of fluid in the event of stoppage of pump ✔

Option A: Speed

Option B: Impeller diameter

Option C: Both A. and B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. and B. ✔

Option A: Reciprocating

Option B: Plunger

Option C: Electromagnetic

Option D: Gear

Correct Answer: Electromagnetic ✔

Option A: D = 1840 H0.5/N

Option B: D = 1840 N/H0.5

Option C: H = 1840 D0.5/N

Option D: D = 1840 H/N

Correct Answer: D = 1840 H0.5/N ✔

Option A: 1

Option B: 0.5

Option C: 2

Option D: 1.5

Correct Answer: 2 ✔

Option A: 40

Option B: 34

Option C: 8

Option D: 37

Correct Answer: 8 ✔

Option A: More

Option B: Less

Option C: Equal

Option D: Either A. or B.; depends on the viscosity of the fluid

Correct Answer: More ✔

Option A: Static

Option B: Undisturbed

Option C: Total

Option D: Dynamic

Correct Answer: Undisturbed ✔

Option A: 24000

Option B: 24

Option C: 0.24

Option D: 0.44

Correct Answer: 0.44 ✔

Option A: Same as that of A

Option B: One fourth as that of A

Option C: Twice as that of A

Option D: Four times as that of A

Correct Answer: One fourth as that of A ✔