Hydraulics And Fluid Mechanics MCQs

Option A: Venturimeter

Option B: Orifice plate

Option C: nozzle

Option D: pitot tube

Correct Answer: all of the above ✔

Option A: pressure

Option B: temperature

Option C: density

Option D: modulus of elasticity

Correct Answer: temperature ✔

Option A: sink to bottom

Option B: float over fluid

Option C: partly immersed

Option D: be fully immersed with top surface at fluid surface

Correct Answer: be fully immersed with top surface at fluid surface ✔

Option A: increases

Option B: decreases

Option C: remains unaffected

Option D: unpredictable

Correct Answer: decreases ✔

Option A: Venturimeter

Option B: Orifice plate

Option C: hot wire anemometer

Option D: rotameter

Correct Answer: pitot tube ✔

Option A: it is the best liquid

Option B: the height of barometer will be less

Option C: its vapour pressure is so low that it may be neglected

Option D: both B. and C.

Correct Answer: D. both B. and C. ✔

Option A: Venturimeter

Option B: Orifice plate

Option C: hot wire anemometer

Option D: rotameter

Correct Answer: pitot tube ✔

Option A: pressure in pipes, channels etc.

Option B: atmospheric pressure

Option C: very low pressure

Option D: difference of pressure between two points

Correct Answer: atmospheric pressure ✔

Option A: decreases linearly with elevation

Option B: remains constant

Option C: varies in the same way as the density

Option D: increases exponentially with elevation

Correct Answer: varies in the same way as the density ✔

Option A: gas law

Option B: Boyle’s law

Option C: Charle’s law

Option D: Pascal’s law

Correct Answer: Boyle’s law ✔

Option A: Bourdon tube

Option B: Pirani Gauge

Option C: micro-manometer

Option D: ionisastion gauge

Correct Answer: ionisastion gauge ✔

Option A: shear stress anctthejiate of angular distortion

Option B: shear stress and viscosity

Option C: shear stress, velocity and viscosity

Option D: pressure, velocity and viscosity

Correct Answer: shear stress anctthejiate of angular distortion ✔

Option A: 1

Option B: 1.2

Option C: 0.8

Option D: 0.75

Correct Answer: 0.75 ✔

Option A: linearly

Option B: first slowly and then steeply

Option C: first steeply and then gradually

Option D: unpredictable

Correct Answer: first slowly and then steeply ✔

Option A: force of adhesion

Option B: force of cohesion

Option C: force of friction

Option D: force of diffusion

Correct Answer: force of cohesion ✔

Option A: atmospheric pressure

Option B: surface tension

Option C: force of adhesion

Option D: force of cohesion

Correct Answer: surface tension ✔

Option A: 1 mm

Option B: 5 mm

Option C: 10 mm

Option D: 20 mm

Correct Answer: 30 mm ✔

A.p = Txr
B.p = T/r
C. p = T/2r
D. p = 2T/r
E. none of the above

Correct Answer: p = 2T/r ✔

Option A: 2.4 m above the hydraulic gradient

Option B: 6.4 m above the hydraulic gradient

Option C: 10.0 m above the hydraulic gradient

Option D: 5.0 above the hydraulic gradient

Correct Answer: 6.4 m above the hydraulic gradient ✔

Option A: less man the vapour pressure over the plane surface

Option B: equal to the vapour pressure over the plane surface

Option C: greater than the vapour pressure over the plane surface

Option D: zero

Correct Answer: less man the vapour pressure over the plane surface ✔

Option A: atmospheric pressure

Option B: surface tension

Option C: force of adhesion

Option D: force of cohesion

Correct Answer: surface tension ✔

Option A: force of adhesion

Option B: force of cohesion

Option C: force of friction

Option D: force of diffusion

Correct Answer: force of cohesion ✔

Option A: 1 mm

Option B: 5 mm

Option C: 10 mm

Option D: 20 mm

Correct Answer: 30 mm ✔

A.p = Txr
B.p = T/r
C. p = T/2r
D.p = 2T/r
E. none of the above

Correct Answer: D.p = 2T/r ✔

Option A: less man the vapour pressure over the plane surface

Option B: equal to the vapour pressure over the plane surface

Option C: greater than the vapour pressure over the plane surface

Option D: zero

Correct Answer: less man the vapour pressure over the plane surface ✔

Option A: viscosity

Option B: osmosis

Option C: surface tension

Option D: cohesion

Correct Answer: osmosis ✔

Option A: viscous/unviscous fluids

Option B: compressibility of fluids

Option C: conservation of mass

Option D: steady/unsteady flow

Correct Answer: conservation of mass ✔

Option A: Boyle’s law

Option B: Archimedes principle

Option C: Pascal’s law

Option D: Newton’s formula

Correct Answer: Pascal’s law ✔

Option A: surface tension

Option B: cohesion of the liquid

Option C: adhesion of the liquid molecules and the molecules on the surface of a solid

Option D: all of the above

Correct Answer: all of the above ✔

Option A: increase

Option B: remain unaffected

Option C: may increase or decrease depending on the characteristics of liquid

Option D: decrease

Correct Answer: decrease ✔

Option A: metres2 per sec

Option B: kg sec/meter

Option C: newton-sec per meter

Option D: newton-sec2 per meter

Correct Answer: newton-sec per meter ✔

Option A: surface tension

Option B: co-efficient of viscosity

Option C: viscosity

Option D: osmosis

Correct Answer: viscosity ✔

Option A: at the inlet

Option B: at the outlet

Option C: at the summit

Option D: ay nay point between inlet and outlet

Correct Answer: at the summit ✔

Option A: cohesion pressure is negligible

Option B: cohesion pressure is decreased

Option C: cohesion pressure is increased

Option D: there is no cohesion pressure

Correct Answer: cohesion pressure is increased ✔

Option A: viscosity

Option B: air resistance

Option C: surface tension forces

Option D: atmospheric pressure

Correct Answer: surface tension forces ✔

Option A: the nature of the liquid and the solid

Option B: the material which exists above the free surface of the liquid

Option C: both of die above

Option D: any one of the above

Correct Answer: both of die above ✔

Option A: meta-center

Option B: center of pressure

Option C: center of buoyancy

Option D: center of gravity

Correct Answer: center of buoyancy ✔

Option A: specific weight

Option B: specific mass

Option C: specific gravity

Option D: specific density

Correct Answer: specific gravity ✔

Option A: 500 kg

Option B: 1000 kg

Option C: 1500 kg

Option D: 2000 kg

Correct Answer: 2000 kg ✔

Option A: the center of gravity of the body andthe meta center

Option B: the center of gravity of the body and the center of buoyancy

Option C: the center of gravity of the body and the center of pressure

Option D: center of buoyancy and metacentre

Correct Answer: the center of gravity of the body andthe meta center ✔

Option A: surface tension

Option B: capillarity

Option C: viscosity

Option D: shear stress in fluids

Correct Answer: viscosity ✔

Option A: upthrust

Option B: buoyancy

Option C: center of pressure

Option D: all the above are correct

Correct Answer: buoyancy ✔

Option A: the meta-center should lie above the center of gravity

Option B: the center of buoyancy and the center of gravity must lie on the same vertical line

Option C: a righting couple should be formed

Option D: all the above are correct

Correct Answer: all the above are correct ✔

Option A: Buoyancy

Option B: Equilibrium of a floating body

Option C: Archimedes’ principle

Option D: Bernoulli’s theorem

Correct Answer: Archimedes’ principle ✔

Option A: meta center

Option B: center of pressure

Option C: center of buoyancy

Option D: center of gravity

Correct Answer: center of pressure ✔

Option A: less

Option B: more

Option C: equal

Option D: less at low temperature and more at high temperature

Correct Answer: more ✔

Option A: increase

Option B: decrease

Option C: remain same

Option D: increase/decrease depending on depth of immersion

Correct Answer: remain same ✔

Option A: 25 kN/m2

Option B: 245 kN/m2

Option C: 2500 kN/m2

Option D: 2.5kN/m2

Correct Answer: 245 kN/m2 ✔

Option A: is uniform flow

Option B: is steady uniform flow

Option C: takes place in straight lines

Option D: involves zero transverse component of flow

Correct Answer: involves zero transverse component of flow ✔

Option A: dynamic viscosity/density

Option B: dynamicviscosity x density

Option C: density/dynamic viscosity

Option D: 1/dynamicviscosity x density

Correct Answer: dynamic viscosity/density ✔

Option A: metres2 per sec

Option B: kg sec/meter

Option C: newton-sec per meter

Option D: newton-sec per meter

Correct Answer: metres2 per sec ✔

Option A: h

Option B: wh

Option C: w/h

Option D: h/w

Correct Answer: h ✔

Option A: 51 cm

Option B: 50 cm

Option C: 52 cm

Option D: 52.2 cm

Correct Answer: 51 cm ✔

Option A: MlL°T2

Option B: MlL°Tx

Option C: MlL r2

Option D: MlL2T2

Correct Answer: MlL°T2 ✔

Option A: Red wood

Option B: Say bolt

Option C: Engler

Option D: Orsat

Correct Answer: Orsat ✔

Option A: pressure

Option B: distance

Option C: level

Option D: flow

Correct Answer: density ✔

Option A: metres2 per sec

Option B: kg sec/metre

Option C: newton-sec per metre2

Option D: newton-sec per metre

Correct Answer: kg sec/metre ✔

Option A: linear

Option B: parabolic

Option C: hyperbolic

Option D: inverse type

Correct Answer: linear ✔

Option A: newtons/m

Option B: newtons/m

Option C: new tons/m

Option D: newtons

Correct Answer: new tons/m ✔

Option A: increase in viscosity of gas

Option B: increase in viscosity of liquid

Option C: decrease in viscosity of gas

Option D: decrease in viscosity of liquid

Correct Answer: decrease in viscosity of liquid ✔

Option A: has constant viscosity

Option B: has zero viscosity

Option C: is incompressible

Option D: is of theoretical interest

Correct Answer: none of the above ✔

Option A: resistance to shear stress is small

Option B: fluid pressure is zero

Option C: linear deformation is small

Option D: only normal stresses can exist

Correct Answer: only normal stresses can exist ✔

Option A: law of gravitation

Option B: Archimedes principle

Option C: principle of buoyancy

Option D: all of the above

Correct Answer: all of the above ✔

Option A: increases

Option B: decreases

Option C: remains constant

Option D: increases first upto certain limit and then decreases

Correct Answer: increases ✔

Option A: tensile stress

Option B: compressive stress

Option C: shear stress

Option D: bending stress

Correct Answer: shear stress ✔

Option A: cohesion

Option B: adhesion

Option C: viscosity

Option D: surface tension

Correct Answer: surface tension ✔

Option A: moving

Option B: viscous

Option C: viscous and static

Option D: inviscous and moving

Correct Answer: moving ✔

Option A: specific weight

Option B: specific volume

Option C: specific speed

Option D: specific gravity

Correct Answer: specific gravity ✔

Option A: 1000 N/m3

Option B: 10000 N/m3

Option C: 9.81 xlO3 N/m3

Option D: 9.81 xlO6N/m3

Correct Answer: 9.81 xlO3 N/m3 ✔

Option A: adhesion

Option B: cohesion

Option C: viscosity

Option D: compressibility

Correct Answer: adhesion ✔

Option A: adhesion

Option B: cohesion

Option C: surface tension

Option D: viscosity

Correct Answer: surface tension ✔

Option A: 1

Option B: 1000

Option C: 100

Option D: 101.9

Correct Answer: 1 ✔

Option A: cannot be compressed

Option B: occupy definite volume

Option C: are not affected by change in pressure and temperature

Option D: GO are not viscous

Correct Answer: none of the above ✔

Option A: fluid

Option B: water

Option C: gas

Option D: perfect solid

Correct Answer: fluid ✔

Option A: are viscous

Option B: possess surface tension

Option C: are compressible

Option D: possess all the above properties

Correct Answer: possess all the above properties ✔

Option A: cannot be subjected to shear forces

Option B: always expands until it fills any container

Option C: has the same shear stress.at a point regardless of its motion

Option D: cannot remain at rest under action of any shear force

Correct Answer: cannot remain at rest under action of any shear force ✔

Option A: incompressible

Option B: inviscous

Option C: viscous and incompressible

Option D: inviscous and compressible

Correct Answer: incompressible ✔

Option A: volumetric strain

Option B: volumetric index

Option C: compressibility

Option D: adhesion

Correct Answer: compressibility ✔

Option A: Newton’s law of motion

Option B: Newton’s law of viscosity

Option C: Pascal’ law

Option D: Continuity equation

Correct Answer: Continuity equation ✔

Option A: pressure

Option B: flow

Option C: shape

Option D: volume

Correct Answer: shape ✔

Option A: the metal piece will simply float over the mercury

Option B: the metal piece will be immersed in mercury by half

Option C: whole of the metal piece will be immersed with its top surface just at mercury level

Option D: metal piece will sink to the bottom

Correct Answer: whole of the metal piece will be immersed with its top surface just at mercury level ✔

Option A: mass of liquid displaced

Option B: viscosity of the liquid

Option C: pressure of the liquid displaced

Option D: depth of immersion

Correct Answer: mass of liquid displaced ✔

Option A: upthrust

Option B: buoyancy

Option C: center of pressure

Option D: all the above are correct

Correct Answer: buoyancy ✔

Option A: 500 kg

Option B: 1000 kg

Option C: 1500 kg

Option D: 2000 kg

Correct Answer: 2000 kg ✔

Option A: higher than the surface of liquid

Option B: the same as the surface of liquid

Option C: lower than the surface of liquid

Option D: unpredictable

Correct Answer: lower than the surface of liquid ✔

Option A: adhesion

Option B: cohesion

Option C: surface tension

Option D: viscosity

Correct Answer: surface tension ✔

Option A: surface tension

Option B: viscosity

Option C: friction

Option D: cohesion

Correct Answer: surface tension ✔

Option A: dissolved air

Option B: dissolved salt

Option C: suspended matter

Option D: all of the above

Correct Answer: all of the above ✔

Option A: it has low vapour pressure

Option B: it is clearly visible

Option C: it has low surface tension

Option D: it can provide longer column due to low density

Correct Answer: it can provide longer column due to low density ✔

Option A: pascal

Option B: poise

Option C: stoke

Option D: faraday

Correct Answer: stoke ✔

Option A: specific viscosity

Option B: viscosity index

Option C: kinematic viscosity

Option D: coefficient of viscosity

Correct Answer: kinematic viscosity ✔

Option A: 0°C

Option B: 0°K

Option C: 4°C D. 20°C

Option D: all temperature

Correct Answer: 0°C ✔

Option A: surface tension

Option B: adhesion

Option C: cohesion

Option D: viscosity

Correct Answer: viscosity ✔

Option A: its vapour pressure is low

Option B: it provides suitable meniscus for the inclined tube

Option C: its density is less

Option D: it provides longer length for a given pressure difference

Correct Answer: its vapour pressure is low ✔

Option A: higher surface tension

Option B: lower surface tension

Option C: surface tension is no criterion

Option D: high density and viscosity

Correct Answer: higher surface tension ✔

Option A: specific gravity = gravity x density

Option B: dynamicviscosity = kinematicviscosity x density

Option C: gravity = specific gravity x density

Option D: kinematicviscosity = dynamicviscosity x density

Correct Answer: dynamicviscosity = kinematicviscosity x density ✔

Option A: energy/unit area

Option B: distance

Option C: both of the above

Option D: it has no units

Correct Answer: both of the above ✔

Option A: 400 kg/cm2

Option B: 4000 kg/cm2

Option C: 40 x 105 kg/cm2

Option D: 40 x 106 kg/cm2

Correct Answer: 4000 kg/cm2 ✔

Option A: acts in the plane of the interface normal to any line in the surface

Option B: is also known as capillarity

Option C: is a function of the curvature of the interface

Option D: decreases with fall in temperature

Correct Answer: acts in the plane of the interface normal to any line in the surface ✔

Option A: 1000

Option B: 2100

Option C: 2700

Option D: 10,000

Correct Answer: 21,000. ✔