Q.1
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and
Q.2
In fluid flow, the stagnation point is defined as a point, where the __________ is zero.
Q.3
Dimension of surface tension is(where, F = force, L = length)
Q.4
In fluid flow, cavitation is caused, if the
Q.5
Mach number is the ratio of the speed of the
Q.6
Which of the following valves will incur maximum pressure drop for the same discharge of water?
Q.7
When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
Q.8
Co-efficient of velocity is __________ the coefficient of discharge.
Q.9
Kinetic energy of fluid per unit weight represented by the velocity head is given by
Q.10
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the
Q.11
Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
Q.12
If in a flow field, between any two points, then the flow must be
Q.13
Which of the following factors does not contribute to the pressure drop in a pipeline ?
Q.14
Maintenance cost of a __________ pump for a particular duty is the least.
Q.15
For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).
Q.16
When the momentum of one fluid is used for moving another fluid, such a device is called a/an
Q.17
If more than two branches of pipes are to be connected at the same point, then use a/an
Q.18
Which law is followed by the velocity distribution in the turbulent boundary layer?
Q.19
With increase in temperature, the vapor pressure of liquids
Q.20
Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum
Q.21
A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is
Q.22
Which of the following is most prone to pulsating discharge flow ?
Q.23
Fanning friction factor equation applies to the __________ fluid flow.
Q.24
A piezometer provided in the pipe measures
Q.25
Air vessel of a reciprocating pump is initially filled with
Q.26
Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'
Q.27
I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch
Q.28
A centrifugal pump loses prime after starting. The reason of this trouble may be
Q.29
In a fully turbulent flow (Re > 105) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
Q.30
Foot valves are provided in the suction line of a centrifugal pump to
Q.31
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
Q.32
Cd for the orifice plate varies from
Q.33
Most commonly used joint in the underground pipe lines is the
Q.34
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is
Q.35
The valve commonly used in pipes larger than 2" dia is a
Q.36
Non-colloidal solution is an example of the __________ fluid.
Q.37
Fluid flow at increasing rate through a diverging pipe is an example of __________ flow.
Q.38
The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
Q.39
Friction produced by the formation of wakes is called the __________ friction.
Q.40
For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary
Q.41
The range of a particular rotameter can be increased by
Q.42
Propeller type centrifugal pumps are most suitable for
Q.43
The pipe wall thickness is minimum for a pipe of given nominal size having schedule number
Q.44
A pressure head of 320 metres of water in meters of CCl₄ (sp.gr = 1.6) will be
Q.45
A fluidis (μ/ρ = 0.01 cm²/sec) moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
Q.46
Lower BWG means __________ of the tube.
Q.47
In magnetic flow meters, voltage generation is
Q.48
The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow.
Q.49
Gradually varying fluid flow is an example of __________ flow.
Q.50
Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid
0 h : 0 m : 1 s