Q.1
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by
Q.2
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
Q.3
The angle of taper on draft tube is
Q.4
The working of which of the following hydraulic units is based on Pascal's law?
Q.5
When a body floating in a liquid, is displaced slightly, it oscillates about
Q.6
A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
Q.7
Which of the following turbine is preferred for 0 to 25 m head of water?
Q.8
The force present in a moving liquid is
Q.9
The flow in a pipe or channel is said to be non-uniform when
Q.10
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.
Q.11
Which of the following instrument can be used for measuring speed of an aeroplane?
Q.12
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.
Q.13
Which of the following is an example of laminar flow?
Q.14
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
Q.15
When a liquid is flowing through a pipe, the velocity of the liquid is
Q.16
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)
Q.17
Which of the following is dimensionless?
Q.18
The mercury does not wet the glass. This is due to the property of the liquid known as
Q.19
Newton's law of viscosity is a relationship between
Q.20
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is
Q.21
In impulse Turbine, energy available at the inlet is in the form of
Q.22
The continuity equation is connected with
Q.23
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.
Q.24
The rise of liquid along the walls of a revolving cylinder about the initial level is _________ the depression of the liquid at the axis of rotation.
Q.25
A hydraulic press is a device used
Q.26
The flow of water through the hole in the bottom of a wash basin is an example of
Q.27
Motion of a liquid in a volute casing of a centrifugal pump is an example of
Q.28
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately
Q.29
A large Reynold number is indication of
Q.30
The unit of dynamic viscosity in S.I. units is
Q.31
Reynold's number is the ratio of inertia force to
Q.32
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than
Q.33
If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in
Q.34
Froude's number is the ratio of inertia force to
Q.35
The maximum number of jets, generally, employed in an impulse turbine without jet interference are
Q.36
When a body is placed over a liquid, it will float if
Q.37
The property by virtue of which a liquid opposes relative motion between its different layers is called
Q.38
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 bring the liquid level from H1 to H2 will be
Q.39
Surface tension has the units of
Q.40
The density of water is 1000 kg/m3 at
Q.41
The product of mass and acceleration of flowing liquid is called
Q.42
A Francis turbine is used when the available head of water is
Q.43
According to Bernoulli's equation for steady ideal fluid flow
Q.44
Pressure intensifier increases the pressure in proportion to
Q.45
Specific weight of sea water is more that of pure water because it contains
Q.46
In order to avoid cavitation in centrifugal pumps
Q.47
Uniform flow occurs when
Q.48
The buoyancy depends upon the
Q.49
The magnitude of water hammer depends upon the
Q.50
Which place in hydraulic turbine is most susceptible for cavitations?
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