A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
Equal to
Less than
More than
None of these
Correct Answer :
C. More than
Related Questions
Falling drops of water become spheres due to the property of
Surface tension of water
Compressibility of water
Capillarity of water
Viscosity of water
In a free nappe,
The pressure below the nappe is atmospheric
The pressure below the nappe is negative
The pressure above the nappe is atmospheric
The pressure above the nappe is negative
The Bernoulli's equation is based on the assumption that
There is no loss of energy of the liquid flowing
The velocity of flow is uniform across any cross-section of the pipe
No force except gravity acts on the fluid
All of the above
Metacentric height is given as the distance between
The center of gravity of the body and the metacentre
The center of gravity of the body and the center of buoyancy
The center of gravity of the body and the center of pressure
Center of buoyancy and metacentre
The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)
1/RN
4/RN
16/RN
64/RN
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
Less than twice
More than twice
Less than three times
More than three times
In a venturi-flume, the flow takes place at
Atmospheric pressure
Gauge pressure
Absolute pressure
None of these
The total energy line lies over the centre line of the pipe by an amount equal to
Pressure head
Velocity head
Pressure head + velocity head
Pressure head - velocity head
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
1/2 × depth
1/2 × breadth
1/2 × sloping side
1/4 × (depth + breadth)
Coefficient of resistance is the ratio of
Actual velocity of jet at vena-contracta to the theoretical velocity
Area of jet at vena-contracta to the area of orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Actual discharge through an orifice to the theoretical discharge
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
Sum
Difference
Arithmetic mean
Geometric mean
A venturi-flume is used to measure
Pressure of liquid
Discharge of liquid
Pressure difference between two points in a channel
Pressure difference between two points in a pipe
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
The pressure on the wall at the liquid level is minimum
The pressure on the bottom of the wall is maximum
The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
The pressure on the bottom of the wall is zer
A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
One
Two
Three
Four
Reynold's number is the ratio of the inertia force to the
Surface tension force
Viscous force
Gravity force
Elastic force
The line of action of the buoyant force acts through the Centroid of the
Submerged body
Volume of the floating body
Volume of the fluid vertically above the body
Displaced volume of the fluid
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is
0.83
0.6
0.4
0.3
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
2.89 kN
8.29 kN
9.28 kN
28.9 kN
For measuring flow by a Venturimeter, if should be installed in
Vertical line
Horizontal line
Inclined line with flow downward
In any direction and in any location
The magnitude of water hammer depends upon the
Elastic properties of the pipe material
Elastic properties of the liquid flowing through the pipe
Speed at which the valve is closed
All of the above
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used?
1 : 5
1 : 2.5
1 : 25
1 : √5
When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
Concave
Convex
Plane
None of these
Hot wire anemometer is used to measure
Pressure in gases
Liquid discharge
Pressure in liquids
Gas velocities
Choose the wrong statement. Alcohol is used in manometer, because
Its vapour pressure is low
It provides suitable meniscus for the inclined tube
Its density is less
It provides longer length for a given pressure difference
The angle of contact in case of a liquid depends upon
The nature of the liquid and the solid
The material which exists above the free surface of the liquid
Both of die above
Any one of the above
Two pipe systems can be said to be equivalent, when the following quantities are same
Friction loss and flow
Length and diameter
Flow and length
Friction factor and diameter
The hydraulic mean depth or the hydraulic radius is the ratio of
Area of flow and wetted perimeter
Wetted perimeter and diameter of pipe
Velocity of flow and area of flow
None of these
The speed of sound in a ideal gas varies directly as its
Absolute temperature
Temperature
Density
Modulus of elasticity
The value of coefficient of discharge is __________ the value of coefficient of velocity.
Less than
Same as
More than
None of these
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
Weir
Notch
Orifice
None of these