Cavitation will begin when
Cavitation will begin when
Euler's number is the ratio of __________ force to pressure force.
Euler's number is the ratio of __________ force to pressure force.
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on.
A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on.
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
The most efficient section of a channel is
The most efficient section of a channel is
A Piezometer tube is used only for measuring
A Piezometer tube is used only for measuring
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
The ratio of absolute viscosity to mass density is known as
The ratio of absolute viscosity to mass density is known as
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
A hydraulic intensifier normally consists of
A hydraulic intensifier normally consists of
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
The pressure measured with the help of a Piezometer tube is in
The pressure measured with the help of a Piezometer tube is in
Coefficient of contraction is the ratio of
Coefficient of contraction is the ratio of
The efficiency of a Pelton wheel working under constant head ________ with the increase in power.
The efficiency of a Pelton wheel working under constant head ________ with the increase in power.
The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.
The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.
During the opening of a valve in a pipe line, the flow is
During the opening of a valve in a pipe line, the flow is
The total head of a liquid particle in motion is equal to
The total head of a liquid particle in motion is equal to
The discharge through a channel of trapezoidal section is maximum when
The discharge through a channel of trapezoidal section is maximum when
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
A balloon lifting in air follows the following principle
A balloon lifting in air follows the following principle
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
The property of fluid by virtue of which it offers resistance to shear is called
The property of fluid by virtue of which it offers resistance to shear is called
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is
A weir, generally, used as a spillway of a dam is
A weir, generally, used as a spillway of a dam is
Pitot tube is used for measurement of
Pitot tube is used for measurement of
A flow through an expanding tube at constant rate is called
A flow through an expanding tube at constant rate is called
Principle of similitude forms the basis of
Principle of similitude forms the basis of
The tendency of a liquid surface to contract is due to the following property
The tendency of a liquid surface to contract is due to the following property
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be
Falling drops of water become spheres due to the property of
Falling drops of water become spheres due to the property of
The pressure of the liquid flowing through the divergent portion of a Venturimeter
The pressure of the liquid flowing through the divergent portion of a Venturimeter
The flow in which conditions do not change with time at any point, is known as
The flow in which conditions do not change with time at any point, is known as
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
A fluid having no viscosity is known as
A fluid having no viscosity is known as
The velocity of the liquid flowing through the divergent portion of a Venturimeter
The velocity of the liquid flowing through the divergent portion of a Venturimeter
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
A hydraulic coupling belongs to the category of
A hydraulic coupling belongs to the category of
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?
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?
The coefficient of discharge for an external mouthpiece is
The coefficient of discharge for an external mouthpiece is
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
According to equation of continuity,
According to equation of continuity,
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
The intensity of pressure on an immersed surface __________ with the increase in depth.
The intensity of pressure on an immersed surface __________ with the increase in depth.
Hydraulic accumulator is used for
Hydraulic accumulator is used for
The equation of continuity holds good when the flow
The equation of continuity holds good when the flow
The flow in a pipe or channel is said to be uniform when
The flow in a pipe or channel is said to be uniform when
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be
The Reynold's number of a ship is __________ to its velocity and length.
The Reynold's number of a ship is __________ to its velocity and length.
Gradually varied flow is
Gradually varied flow is
The atmospheric pressure with rise in altitude decreases
The atmospheric pressure with rise in altitude decreases
Delivery head of a centrifugal pump is
Delivery head of a centrifugal pump is
An average value of coefficient of velocity is
An average value of coefficient of velocity is
Discharge of a centrifugal pump is
Discharge of a centrifugal pump is
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is
The total energy line lies over the centre line of the pipe by an amount equal to
The total energy line lies over the centre line of the pipe by an amount equal to
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?
Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
An ideal flow of any fluid must satisfy
An ideal flow of any fluid must satisfy
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
In axial flow fans and turbines, fluid enters and leaves as follows
In axial flow fans and turbines, fluid enters and leaves as follows
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
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
The bulk modulus of elasticity
The bulk modulus of elasticity
Head developed by a centrifugal pump depends on
Head developed by a centrifugal pump depends on
Which of the following pump is generally used to pump highly viscous fluid?
Which of the following pump is generally used to pump highly viscous fluid?
Stoke is the unit of
Stoke is the unit of
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to
The vapour pressure over the concave surface is
The vapour pressure over the concave surface is
A hydraulic accumulator normally consists of
A hydraulic accumulator normally consists of
Which type of the pump is different from others in the same group?
Which type of the pump is different from others in the same group?
Head developed by a centrifugal pump is
Head developed by a centrifugal pump is
The velocity corresponding to Reynold number of 2000 is called
The velocity corresponding to Reynold number of 2000 is called
Ratio of inertia force to surface Jension is known as
Ratio of inertia force to surface Jension is known as
Kinematic viscosity is equal to
Kinematic viscosity is equal to
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
When the flow parameters at any given instant remain same at every point, then flow is said to be
When the flow parameters at any given instant remain same at every point, then flow is said to be
According to Bernoulli's equation
According to Bernoulli's equation
The velocity at which the flow changes from laminar flow to turbulent flow is called
The velocity at which the flow changes from laminar flow to turbulent flow is called
A flow through a long pipe at constant rate is called
A flow through a long pipe at constant rate is called
The fluid forces considered in the Navier Stokes equation are
The fluid forces considered in the Navier Stokes equation are
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by
Center of pressure compared to e.g. is
Center of pressure compared to e.g. is
The specific speed of a turbine is given by the equation
The specific speed of a turbine is given by the equation
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)
The discharge through a channel of rectangular section will be maximum, if
The discharge through a channel of rectangular section will be maximum, if
When the flow in an open channel is gradually varied, the flow is said to be
When the flow in an open channel is gradually varied, the flow is said to be
The total energy of a liquid particle in motion is equal to
The total energy of a liquid particle in motion is equal to
