An error ofin measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to
-
1.25% -
1.5% -
1.75% -
2.25%
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if
-
area is horizontal -
area is vertical -
area is inclined -
all the above.
If the volume of a liquid weighingkg is 4 cubic metres, 0.is its
-
specific weight -
specific mass -
specific gravity -
none of these.
Inside pressure in a hollow soap bubble in the air is : (where d is the diameter of the bubble)
Discharge Q over a rectangular weir of length L and height H, is given by the equation
-
Q = 2/3 Cd2g LH3/2 
-
Q = 2/3 CdL H2gH
-
-
all the above.
The momentum correction factor (β) for the viscous flow through a circular pipe is
-
1.25 -
1.33 -
1.50 -
1.66 -
2.00
A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is
-
less than 12.2 m of the water -
more than 12.2 m of the water -
equal of 12.2 m of water -
none of these.
Bernoulli's equation assumes that
-
fluid is non-viscous -
fluid is homogeneous -
flow is steady -
flow is along the stream line -
all the above.
The momentum correction factor (β) for the viscous flow through a circular pipe is
-
1.25 -
1.33 -
1.50 -
1.66 -
2.00
A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is
-
less than 12.2 m of the water -
more than 12.2 m of the water -
equal of 12.2 m of water -
none of these.
A piezometer opening in pipes measures
-
velocity head -
static pressure -
total pressure -
negative static pressure.
Hydrostatic pressure on a dam depends upon its
-
length -
depth -
shape -
material -
both (b) and (c).
An independent mass of a fluid does not posses
-
elevation energy -
kinetic energy -
pressure energy -
none of these.
A syphon is used
-
to connect water reservoirs at different levels intervened by a hill -
to supply water to a town from higher level to lower level -
to fill up a tank with water at higher level from a lower level -
none of these.
A syphon is used
-
to connect water reservoirs at different levels intervened by a hill -
to supply water to a town from higher level to lower level -
to fill up a tank with water at higher level from a lower level -
none of these.
When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress 
, where μ is known as
-
coefficient of viscosity -
absolute viscosity -
dynamic viscosity -
viscosity -
all the above.
When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to
-
weight of the body -
weight of the fluid displaced by the body -
weight of the body and fluild displaced by the body -
difference of weights of the fluid displaced and that of the body -
none of these.
The horizontal component of the force on a curved surface is equal to
-
weight of liquid vertically below the curved surface -
force on a vetical projection of the curved surface -
product of pressure at its centroid and the area -
weight of liquid retained by the curved area.
A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is
-
2/g m of water -
g/2 m of water -
1g m of water -
g m of water.
The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is
-
π -
2π -
3π -
4π -
π/2
Maximum efficiency of transmission of power through a pipe, is
-
25% -
33.3% -
50% -
66.67%.
If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is
-
400 H.P. -
450 H.P. -
500 H.P. -
550 H.P.
An ideal flow of a liquid obeys
-
Continuity equation -
Newton's law of viscosity -
Newton's second law of motion -
dynamic viscosity law,
If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is
-
400 H.P. -
450 H.P. -
500 H.P. -
550 H.P.
The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is
-
water hammer -
hydraulic jump -
critical discharge -
none of these.
The Empirical formula for discharge over large rectangular weirs, is known as
-
Francis formula -
Bazin formula -
Rehbook formula -
Kutter's formula.
Reynold number is the ratio of initial force and
-
viscosity -
elasticity -
gravitational force -
surface tension.
The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is
Reynold number is the ratio of initial force and
-
viscosity -
elasticity -
gravitational force -
surface tension.
In a circular pipe of length L and diameter d, a viscous liquid is flowing with a velocity v. The loss in head, is
-
-
-
-
-
none of these.