Q.1
A stream tube is that, which has __________ cross-section entirely bounded by stream lines.
Q.2
Slugging in a fluidised bed can be avoided by using
Q.3
Which is not a variable head meter?
Q.4
In a fluidised bed reactor
Q.5
In a free vortex, the
Q.6
When the water is warm, the height to which it can be lifted by a pump
Q.7
For a particle settling in water at its terminal settling velocity, which of the following is true?
Q.8
In case of end to end connection of two or more pipes in series, the __________ each pipe.
Q.9
For the manometer set up shown in the figure, the pressure difference PA - PB is given by
Q.10
Speed of sound in an ideal gas depends on its
Q.11
Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?
Q.12
The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which "sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis". The centre of pressure of a rectangular surface (of width 'w') immersed vertically in a static mass of fluid is at a depth of(where, y = depth of the liquid)
Q.13
In turbulent flow, a rough pipe has the same friction factor as a smooth pipe
Q.14
The boundary layer is that part of a moving fluid, in which the fluid velocity is
Q.15
A centrifugal pump designed for handling water (μ = 1 cp) will deliver __________ when pumping a thicker oil (μ = 30 cp).
Q.16
The friction factor for turbulent flow in a hydraulically smooth pipe
Q.17
Pick out the correct statement.
Q.18
Pick out the wrong statement.
Q.19
Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement.
Q.20
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
Q.21
The time of oscillation of a floating body is
Q.22
Foot valve provided in the pump is a __________ valve.
Q.23
In continuous fluidisation
Q.24
In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.
Q.25
A special type of liquid transporting device is the diffuser pump, in which __________ are minimised.
Q.26
A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is
Q.27
In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.
Q.28
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is
Q.29
Vena-contracta formed during flow of a liquid through an orificemeter has
Q.30
The line traced by a single fluid particle as it moves over a period of time is called __________ line.
Q.31
A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is
Q.32
For flow through an orifice from a reservoir, the actual velocity at the vena con-tracta is given by
Q.33
In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is
Q.34
Pick out the correct statement pertaining to the flow through a converging-diverging tube.
Q.35
The discharge through a rectangular weir varies as
Q.36
The discharge through a venturimeter depends upon
Q.37
Surge tanks are provided in high pressure water pipelines to
Q.38
Which of the following has the maximum compression ratio?
Q.39
Stoke's law is valid, when the particle Reynolds number is
Q.40
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the
Q.41
Weber number is the ratio of inertial force to __________ force.
Q.42
One stoke (unit of kinematic viscosity) is equivalent to
Q.43
Hydraulic intensifier is used for increasing the
Q.44
Power required by a centrifugal pump is proportional to (where, D = diameter, N = r.p.m)
Q.45
The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number.
Q.46
The line of action of the buoyant force passes through the centre of gravity of the
Q.47
Glass pipes can be joined by
Q.48
The maximum head that can be developed by a single impeller is __________ ft.
Q.49
At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump?
Q.50
The pump impeller and the turbine runner in a hydraulic torque converter
0 h : 0 m : 1 s