Q.1
Fluid resistance to shear depends upon its
Q.2
Gradually varied flow in open channel is a/an __________ flow.
Q.3
In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes
Q.4
A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.
Q.5
Prandtl number is a measure of the
Q.6
Mass velocity is independent of temperature & pressure, when the flow is
Q.7
In case of laminar flow of fluid through a circular pipe, the
Q.8
Normal depth in open channel flow is the depth of flow in the channel
Q.9
Which of the following is not concerned with the fluid-particle interaction?
Q.10
The buoyant force acting on a floating body is dependent on the
Q.11
Piezometric head is the sum of the __________ heads.
Q.12
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is
Q.13
The fluid jet discharging from a 2" diameter orifice has a diameter of 1.75" at its vena-contracta. The co-efficient of contraction is
Q.14
What is the normal range of exit cone angle of a venturimeter?
Q.15
The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the
Q.16
The vent valve provided in a liquid handling centrifugal pump is
Q.17
Check valve is used for __________ flow.
Q.18
What causes convective acceleration in fluid flow?
Q.19
Centrifugal compressors compared to reciprocating compressors
Q.20
For flow of fluids through packed bed, the superficial velocity is
Q.21
Which of the following is dimensionless?
Q.22
The pressure co-efficient is the ratio of pressure forces to __________ forces.
Q.23
Upto what value of 'Mach number', a fluid may be considered as incompressible?
Q.24
The head loss due to sudden contraction is proportional to
Q.25
Stoke's equation is valid in the Reynolds number range
Q.26
Air vessel fitted to a reciprocating pump
Q.27
A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is __________ litres.
Q.28
In case of turbulent flow of fluid through a circular pipe, the
Q.29
Boundary layer separation is characterised by one of the conditions given below, where 'Re' is the Reynolds number for the flow. Select the appropriate conditions.
Q.30
For the same terminal conditions and fitting size, the least friction loss is incurred in a/an
Q.31
Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation ?
1. Fluid flow is frictionless & irrotational.
2. Fluid flow is steady.
3. Fluid flow is uniform & turbulent.
4. Fluid is compressible.
5. Fluid is incompressible.
Q.32
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is
Q.33
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.
Q.34
A pitched-blade turbine draws __________ a straight blade turbine.
Q.35
Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will
Q.36
Buckingham-π theorem states that in any physical problem including 'n' quantities having 'm' diamensions, the quantities can be arranged into __________ independent dimensionless parameters.
Q.37
Pressure co-efficient is the ratio of pressure forces to __________ forces.
Q.38
Pascal's law is valid, only when the fluid is
Q.39
Friction factor for a hydraulically smooth pipe at NRe = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will
Q.40
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
Q.41
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water)
Q.42
With increase in the shear rate, the apparent viscosity of pseudoplastic fluids
Q.43
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
Q.44
The fluid property, due to which, mercury does not wet the glass is
Q.45
Sewage sludge is __________ type of non-Newtonion fluid.
Q.46
__________ pumps are axial flow pumps.
Q.47
Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
Q.48
Viscosity of a liquid decreases __________ with rise in temperature.
Q.49
In isotropic turbulence, the __________ are equal to each other.
Q.50
Two piping system are said to be equivalent, when the __________ are same.
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