hydraulics and fluid mechanics MCQs – Page 2

A. center of pressure

B. upthrust

D. all the above are correct

E. none of above is correct

A. none of the above

C. poise

D. faraday

E. pascal

A. adhesion

C. cohesion

D. volumetric index

E. volumetric strain

A. is a function of the curvature of the interface

B. is also known as capillarity

D. decreases with fall in temperature

E. has no units

B. none of the above

C. newton-sec per metre

D. metres2 per sec

E. newton-sec per metre2

A. hydrostaticforce = surface tension x gravity.

B. specific gravity = gravity x density

C. kinematicviscosity = dynamicviscosity x density

E. gravity = specific gravity x density

A. surface tension is no criterion

B. high density and viscosity

C. low density and viscosity

D. lower surface tension

A. less

C. more or less depending on size of glass tube

D. none of the above.

E. same

A. compressive stress

B. all of the above

C. bending stress

E. tensile stress

B. Bernoullis theorem

C. boundary layer theory

D. Newtons law of viscosity

E. Pascal law

A. viscosity

B. atmospheric pressure

C. none of the above

D. air resistance

A. increase

C. unpredictable

D. remain unaffected

E. may increase or decrease depending on the characteristics of liquid

A. U-tube with mercury

B. U-tube with water

C. inclined U-tube

E. displacement type

A. viscous force and buoyancy force

C. viscous force and inertial force

D. pressure force and viscous force

E. inertial force and gravity

A. 7

B. 5

C. 1

B. none of the above

C. at the outlet

D. at the inlet

E. ay nay point between inlet and outlet

B. greater than the vapour pressure over the plane surface

C. zero

D. none of the above

E. equal to the vapour pressure over the plane surface

A. uniform flow

C. streamline flow

D. one dimensional flow

E. turbulent flow

B. h/wh

C. w/h

D. h

E. h/w

A. velocity, depth, pressure, etc. change from point to point in the fluid flow

C. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

D. the direction and magnitude of the velocity at all points are identical

E. the magnitude and direction of the velocity do not change from point to point in the fluid

A. center of pressure

B. center of buoyancy

C. liquid surface

D. e.g. of body

A. If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions

C. The center of buoyancy is located at the center of gravity of the displaced liquid

D. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy

E. For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy

B. the flow is steady

C. flow occurs at constant fate

D. the flow is streamline

E. size and cross section change uniformly along length

A. Equilibrium of a floating body

B. Buoyancy

C. Metacentric principle

D. Bernoullis theorem

A. laminar flow

B. steady flow

C. turbulent flow

D. all of the above

A. negligible

C. same as buoyant force

D. non of these

A. equal

C. less

D. there is no such criterion

E. less at low temperature and more at high temperature

A. 1 kg

B. 1000 kg

C. 100 kg

E. 10,000 kg

A. 25 kN/m2

B. 2500 kN/m2

D. 12.5 kN/m2

E. 2.5kN/m2

A. McLeod gauge

B. Bourdon tube

C. micro-manometer

D. Pirani Gauge

A. shear stress and viscosity

C. pressure, velocity and viscosity

D. shear stress, pressure and rate of angular distortion

E. shear stress, velocity and viscosity

A. 1

B. 0.8

C. 1.2

E. 1.25

A. zero

B. greater than the vapour pressure over the plane surface

D. equal to the vapour pressure over the plane surface

E. none of the above

A. more than the weight of the body

B. less than the weight of the body

D. weight of body plus the weight of the fluid displaced hy the body

E. the weight of the body

A. very low pressure

B. rain level

D. pressure in pipes, channels etc.

E. difference of pressure between two points

A. 2.4 m

B. 5.0 m

D. 2.5 m

E. 4.0 m

A. pitot tube

C. Orifice plate

D. nozzle

E. Venturimeter

A. center of buoyancy and e.g. must lie on same vertical plane

B. none of the above

C. meta center should be above e.g.

D. a righting couple should be formed

A. 0.4

C. 0.5

D. none of the above

E. 0.5

A. 1/dynamicviscosity x density

C. dynamicviscosity x density

D. density/dynamic viscosity

E. same as dynamic viscosity

A. hot wire anemometer

B. rotameter

C. Venturimeter

E. Orifice plate

B. force of adhesion

C. viscosity

D. atmospheric pressure

E. force of cohesion

B. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

C. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

D. the direction and magnitude of the velocity at all points are identical

E. the magnitude aricf direction of the velocity do not change from point to point in the fluid

A. = T/r

B. none of the above

C. = Txr

D. p = T/2r

A. Mach number

C. Froude number

D. Reynolds number

E. none of the above

A. performing acceptance tests

B. hydraulic designs

C. comparing two identical equipments

E. comparing similarity between design and actual equipment

A. energy

C. mass

D. time

E. work

A. on the surface at which gravitational force acis

C. where pressure equivalent to hydraulic thrust will act

D. similar to metacentre

E. at which all hydraulic forces meet

A. none of the above

B. less than 4000

C. more than 4000

E. between 2000 and 4000

A. unpredictable

B. remains constant

C. decreases linearly with elevation

D. increases exponentially with elevation