Q.1
Which of the following statement is correct?
Q.2
Which of the following statement is correct?
Q.3
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is
Q.4
In centrifugal pumps, maximum efficiency is obtained when the blades are
Q.5
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
Q.6
The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as
Q.7
Which of the following is the unit of kinematic viscosity?
Q.8
The process of diffusion of one liquid into the other through a semi permeable membrane is called
Q.9
Which of the following statement is correct?
Q.10
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
Q.11
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
Q.12
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called
Q.13
According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to
Q.14
In an isothermal atmosphere, the pressure
Q.15
Rain drops are spherical because of
Q.16
The center of gravity of the volume of the liquid displaced by an immersed body is called
Q.17
The resultant upward pressure of the fluid on an immersed body is called
Q.18
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called
Q.19
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
Q.20
A pitot tube is used to measure the
Q.21
Choose the wrong statement
Q.22
Choose the wrong statement
Q.23
Choose the wrong statement
Q.24
Select the wrong statement
Q.25
Choose the wrong statement
Q.26
Braking jet in an impulse turbine is used
Q.27
Rotameter is a device used to measure
Q.28
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
Q.29
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
Q.30
Choose the wrong statement
Q.31
The specific speed of turbine is defined as the speed of a unit
Q.32
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)
Q.33
When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
Q.34
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
Q.35
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
Q.36
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).
Q.37
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
Q.38
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
Q.39
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is
Q.40
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of
Q.41
Coefficient of resistance is the ratio of
Q.42
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)
Q.43
The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)
Q.44
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
Q.45
The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
Q.46
The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)
Q.47
One cubic metre of water weighs
Q.48
According to fan laws, for fans having constant wheel diameter, the pressure varies
Q.49
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?
Q.50
The pressure measured with the help of a pressure gauge is called
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