Q.1
A fluid having no viscosity is known as
Q.2
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
Q.3
A body floats in stable equilibrium
Q.4
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
Q.5
The total head of a liquid particle in motion is equal to
Q.6
The meatcentric height is the distance between the
Q.7
If no resistance is encountered by displacement, such a substance is known as
Q.8
One stoke is equal to
Q.9
The angle of contact in case of a liquid depends upon
Q.10
The Newton's law of resistance is based on the assumption that the
Q.11
When the Mach number is between __________ the flow is called super-sonic flow.
Q.12
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)
Q.13
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)
Q.14
Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
Q.15
The center of pressure of a surface subjected to fluid pressure is the point
Q.16
Surface tension
Q.17
Euler's equation in the differential form for the motion of liquids is given by
Q.18
The centre of gravity of the volume of the liquid displaced is called
Q.19
A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is
Q.20
In a reciprocating pump, air vessels are used to
Q.21
The absolute pressure is equal to
Q.22
The pressure less than atmospheric pressure is known as
Q.23
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will
Q.24
Casting of a centrifugal pump is designed so as to minimize
Q.25
Viscosity of water in comparison to mercury is
Q.26
A venturi-flume is used to measure
Q.27
The critical depth meter is used to measure
Q.28
The normal stress in a fluid will be constant in all directions at a point only if
Q.29
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is
Q.30
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.
Q.31
A point, in a compressible flow where the velocity of fluid is zero, is called
Q.32
Dynamic viscosity of most of the gases with rise in temperature
Q.33
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
Q.34
The maximum number of jets generally employed in impulse turbine without jet interference is
Q.35
In order to measure the flow with a Venturimeter, it is installed in
Q.36
Dynamic viscosity of most of the liquids with rise in temperature
Q.37
A manometer is used to measure
Q.38
A differential manometer is used to measure
Q.39
Hot wire anemometer is used to measure
Q.40
Liquids transmit pressure equally in all the directions. This is according to
Q.41
The hydraulic mean depth or the hydraulic radius is the ratio of
Q.42
The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
Q.43
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of
Q.44
Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of
Q.45
The discharge through a reaction turbine __________ with the increase in unit speed.
Q.46
Poise is the unit of
Q.47
The hydraulic efficiency of an impulse turbine is the
Q.48
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
Q.49
A fluid which obeys the Newton's law of viscosity is termed as
Q.50
Dimensions of surface tension are
0 h : 0 m : 1 s