The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.
Equal to
Less than
More than
None of these
Correct Answer :
C. More than
Related Questions
The maximum efficiency of transmission through a pipe is
50 %
56.7 %
66.67 %
76.66 %
The point at which the resultant pressure on an immersed surface acts, is known as
Centre of gravity
Centre of depth
Centre of pressure
Centre of immersed surface
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.
Plus
Minus
Divide
Multiply
Which of the following is an example of laminar flow?
Underground flow
Flow past tiny bodies
Flow of oil in measuring instruments
All of these
A flow is called super-sonic if the
Velocity of flow is very high
Discharge is difficult to measure
Mach number is between 1 and 6
None of these
A structure used to dam up a stream or river over which the water flows is called
Orifice
Notch
Weir
Dam
The meatcentric height is the distance between the
Centre of gravity of the floating body and the centre of buoyancy
Centre of gravity of the floating body and the metacentre
Metacentre and centre of buoyancy
Original centre of buoyancy and new centre of buoyancy
Kinematic viscosity is equal to
Dynamic viscosity/density
Dynamic viscosity × density
Density/dynamic viscosity
1/dynamic viscosity × density
The line of action of the buoyant force acts through the
Centroid of the volume of fluid vertically above the body
Centre of the volume of floating body
Center of gravity of any submerged body
Centroid of the displaced volume of fluid
The value of mass density in kg-sec-V-m⁴ for water at 0°C is
1
1000
100
101.9
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
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
Less than
More than
Equal to
None of these
Stoke is the unit of
Kinematic viscosity in C. G. S. units
Kinematic viscosity in M. K. S. units
Dynamic viscosity in M. K. S. units
Dynamic viscosity in S. I. units
Bernoulli equation deals with the law of conservation of
Mass
Momentum
Energy
Work
The sheet of water flowing over a notch or a weir is known as
Sill or crest
Nappe or vein
Orifice
None of these
An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is
10 m/sec²
9.81 m/sec²
9.75 m/sec²
9 m/sec
Buoyant force is
The resultant force acting on a floating body
The resultant force on a body due to the fluid surrounding it
Equal to the volume of liquid displaced
The force necessary to maintain equilibrium of a submerged body
Cavitation will begin when
The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
Pressure becomes more than critical pressure
Flow is increased
Pressure is increased
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
Coincides with its centre of gravity
Lies above its centre of gravity
Lies below its centre of gravity
Lies between the centre of buoyancy and centre of gravity
Operation of McLeod gauge used for low pressure measurement is based on the principle of
Gas law
Boyle's law
Charles law
Pascal's law
A one dimensional flow is one which
Is uniform flow
Is steady uniform flow
Takes place in straight lines
Involves zero transverse component of flow
The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to
1 Pa
91 Pa
981 Pa
9810 Pa
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)
wA
wx
wAx
wA/x
The dynamic viscosity of the liquid __________ with rise in temperature.
Remain unaffected
Increases
Decreases
None of these
Pressure of the order of 10 torr can be measured by
Bourdon tube
Pirani Gauge
Micro-manometer
Lonisation gauge
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
1/16 to 1/8
1/8 to 1/4
1/4 to 1/3
1/3 to 1/2
Coefficient of contraction is the ratio of
Actual velocity of jet at vena contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Area of jet at vena-contracta to the area of orifice
If the depth of water in an open channel is less than the critical depth, the flow is called
Critical flow
Turbulent flow
Tranquil flow
Torrential flow
In a depressed 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
Ratio of inertia force to surface Jension is known as
Mach number
Froude number
Reynoldss number
Weber's number