Q.1
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge
Q.2
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)
Q.3
For small discharge at high pressure, following pump is preferred
Q.4
Manometric head, in case of a centrifugal pump, is equal to
Q.5
Multistage centrifugal pumps are used to
Q.6
Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of
Q.7
General energy equation holds for
Q.8
One horsepower is equal to
Q.9
Practical fluids
Q.10
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is
Q.11
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is
Q.12
In a reaction turbine, the draft tube is used
Q.13
In reaction turbine, draft tube is used
Q.14
For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred
Q.15
The flow rate in gear pump
Q.16
The increase of temperature results in
Q.17
Runaway speed of a hydraulic turbine is
Q.18
Mechanical efficiency of a centrifugal pump is the ratio of
Q.19
The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is
Q.20
The total energy line lies over the hydraulic gradient line by an amount equal to the
Q.21
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
Q.22
The hammer blow in pipes occurs when
Q.23
In a venturi-flume, the flow takes place at
Q.24
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water
Q.25
The buoyancy depends on
Q.26
One poise is equal to
Q.27
A structure used to dam up a stream or river over which the water flows is called
Q.28
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
Q.29
Overall efficiency of a centrifugal pump is the ratio of
Q.30
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
Q.31
An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
Q.32
Total pressure on a 1m x 1m gate immersed vertically at a depth of 2 m below the free water surface will be
Q.33
The total energy of a liquid particle in motion is equal to
Q.34
A hydraulic intensifier normally consists of
Q.35
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
Q.36
Center of pressure compared to e.g. is
Q.37
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
Q.38
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
Q.39
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
Q.40
The total energy line lies over the centre line of the pipe by an amount equal to
Q.41
The specific speed of a turbine is given by the equation
Q.42
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
Q.43
The volumetric change of the fluid caused by a resistance is known as
Q.44
The discharge over a rectangular notch is
Q.45
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as
Q.46
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as
Q.47
The specific weight of water is 1000 kg/m3
Q.48
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
Q.49
If the net positive suction head (NPSH) requirement for the pump is not satisfied, then
Q.50
Kinematic viscosity is equal to
0 h : 0 m : 1 s