Back water curve is caused if
-
friction head loss is more than the bed slope -
pressure is due to weir in the channel -
there is an increase in width of the channel -
none of these.
The unit of the viscosity is
-
kg sec/m2 -
Newton sec per m2 -
Newton-sec2/m3 -
m2 per sec.
The value of momentum correction factor (β) for a laminar flow through a circular pipe, is
-
1/2 -
2/3 -
3/4 -
4/3 -
3/2
In C.G.S. system the unit of visocity is
-
dyne -
joule -
poise -
Newton -
none of these.
A spherical loadkg is rolled through 9.8 m across the deck of a ship weighingkg. If the metacentric height of the ship is 5 metres, the angle of heel, is
-
10° 5' -
10° 10' -
10° 15' -
10° 20'
An orifice is an opening in a vessel with
-
closed perimeter of regular shape through which water flows -
the water level of the liquid on the up stream side is below the top of the orifice -
partially full flow -
prolonged sides having length of 2 to 3 diameters of the opening in thick wall.
The value of momentum correction factor (β) for a laminar flow through a circular pipe, is
-
1/2 -
2/3 -
3/4 -
4/3 -
3/2
A spherical loadkg is rolled through 9.8 m across the deck of a ship weighingkg. If the metacentric height of the ship is 5 metres, the angle of heel, is
-
10° 5' -
10° 10' -
10° 15' -
10° 20'
Kinematic viscosity of liquids by equation 
is determined by :
-
Redwood viscometer -
Engler viscometer -
Saybolt universal viscometer -
None of these.
The ratio of the inertia and viscous forces acting in any flow, ignoring other forces, is called
-
Euler number -
Frode number -
Reynold number -
Weber number.
In C.G.S. system the units of kinematic viscosity, is
-
stoke -
poise -
Newton -
none of these.
On an inclined plane, centre of pressure is located
-
at the centroid -
above the centroid -
below the centroid -
anywhere.
An error ofin measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to
-
1.25% -
1.5% -
2.0%. -
2.5%
Power transmitted through a pipe is maximum when friction head loss, is
-
one-half of the total head supplied -
one-third of the total head supplied -
one-fouth of the total head supplied -
equal to the total head supplied.
Manometers are used to measure
-
pressure in water channels, pipes etc. -
difference in pressure at two points -
atmospheric pressure -
very low pressure.
The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is
-
1/2 -
2/3 -
3/2 -
3/4
Pick up the correct statement from the following :
-
In incompressible flow the density of a fluid remains constant -
In compressible flow, the density of a fluid changes from point to point -
In uniform flow, the velocity of a fluid does not change with respect to length of flow direction -
All the above.
An error ofin measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to
-
1.25% -
1.5% -
2.0%. -
2.5%
The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called
-
path line -
stream line -
potential line -
streak line.
A triangular notch is preferred to a rectangular notch because
-
only one reading is required -
its formula is simple to remember -
it gives more accurate results for low discharge -
it measures a wide range of flows accurately -
all the above.
Pick up the incorrect statement from the following :
-
In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis -
In radial flow, velocity of flow is in a radial direction -
In radial flow, flow may take place radially inward to or outward from the centre -
In radial flow, flow is one dimensional with stream lines parallel.
In case of laminar flow through a circular pipe,
-
momentum correction factor is 1.33 -
energy correction factor is 2.00 -
both (a) and (b) -
Neither (a) nor (b).
If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is
-
2gH 
-
-
-
-
none of these.
Mercury is generally used in barometers because
-
its vaour pressure is practically zero -
the height of the barometer will be less -
it is a best liquid -
both (a) and (b) above -
both (b) and (c) above.
Pick up the incorrect statement from the following :
-
In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis -
In radial flow, velocity of flow is in a radial direction -
In radial flow, flow may take place radially inward to or outward from the centre -
In radial flow, flow is one dimensional with stream lines parallel.
If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is
-
2gH
-
-
-
-
none of these.
In flowing liquids pitot tubes are used measure
-
discharge -
pressure -
velocity -
depth.
Capillary rise of water is
-
directly proportional to surface tension -
inversely proportional to water density -
inversely proportional to diameter of the tube -
All of these.
A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water
-
rises on the front side of the tank -
falls on the back side of the tank -
remains the same at both sides of the tank -
rises on the back side and falls on the front side -
none of these.
The dimensional formula of force is
-
MLT-2 -
M-1LT2 -
ML-2T -
M-1L2T-2 -
none of these.