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
1
1.2
0.8
0.75
Correct Answer :
D. 0.75
Related Questions
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)
0.5 a. √2gH
0.707 a. √2gH
0.855 a. √2gH
a. √2gH
Which of the following statement is correct?
In a compressible flow, the volume of the flowing liquid changes during the flow
A flow, in which the volume of the flowing liquid does not change, is called incompressible flow
When the particles rotate about their own axes while flowing, the flow is said to be rotational flow
All of the above
Dynamic viscosity of most of the liquids with rise in temperature
Increases
Decreases
Remain unaffected
Unpredictable
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
p/sinα
2p/sinα
p/2sinα
2p/sin (α/2)
For a floating body to be in stable equilibrium, its metacentre should be
Below the center of gravity
Below the center of buoyancy
Above the center of buoyancy
Above the center of gravity
The pressure at a point in a fluid will not be same in all the directions when the fluid is
Moving
Viscous
Viscous and static
Viscous and moving
The maximum efficiency of transmission through a pipe is
50 %
56.7 %
66.67 %
76.66 %
The centre of gravity of the volume of the liquid displaced by an immersed body is called
Centre of gravity
Centre of pressure
Metacentre
Centre of buoyancy
The Euler's equation for the motion of liquids is based upon the assumption that
The fluid is non - viscous, homogeneous and incompressible
The velocity of flow is uniform over the section
The flow is continuous, steady and along the stream line
All of the above
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will
Increase
Remain unaffected
May increase or decrease depending on the characteristics of liquid
Decrease
The purpose of a surge tank is
To control the pressure variations due to rapid changes in the pipe line flow
To eliminate water hammer possibilities
To regulate flow of water to turbines by providing necessary retarding head of water
All of the above
According to Bernoulli's equation
Z + p/w + v²/2g = constant
Z + p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z - p/w - v²/2g = constant
In a static fluid
Resistance to shear stress is small
Fluid pressure is zero
Linear deformation is small
Only normal stresses can exist
The unit of viscosity is
Metres² per sec
kg-sec/metre
Newton-sec per metre²
Newton-sec per meter
Bernoulli's equation is applied to
Venturimeter
Orifice meter
Pitot tube
All of these
The velocity at which the flow changes from laminar flow to turbulent flow is called
Critical velocity
Velocity of approach
Sub-sonic velocity
Super-sonic velocity
The maximum discharge over a broad crested weir is
0.384 Cd × L × H1/2
0.384 Cd × L × H3/2
1.71 Cd × L × H1/2
1.71 Cd × L × H3/2
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is
400 kg/cm²
4000 kg/cm²
40 × 10⁵ kg/cm²
40 × 10⁶ kg/cm²
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
Steady
Streamline
Turbulent
Unsteady
The flow in a pipe is turbulent when Reynold number is
Less than 2000
Between 2000 and 2800
More than 2800
None of these
Principle of similitude forms the basis of
Comparing two identical equipments
Designing models so that the result can be converted to prototypes
Comparing similarity between design and actual equipment
Hydraulic designs
The two important forces for a floating body are
Buoyancy, gravity
Buoyancy, pressure
Buoyancy, inertial
Inertial, gravity
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
dQ/Q = 3/2 × (dH/H)
dQ/Q = 2 × (dH/H)
dQ/Q = 5/2 × (dH/H)
dQ/Q = 3 × (dH/H)
The resultant of all normal pressures acts
At C.G. of body
At center of pressure
Vertically upwards
At metacentre
Reynold's number is the ratio of inertia force to
Pressure force
Elastic force
Gravity force
Viscous force
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
(q/g)1/2
(q²/g)1/3
(q³/g)1/4
(q⁴/g)1/5
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.
Neutral
Stable
Unstable
None of these
The force of buoyancy is always __________ the weight of the liquid displaced by the body.
Equal to
Less than
More than
None of these
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.
Less than
More than
Equal to
None of these
An air vessel is provided at the summit in a siphon to
Avoid interruption in the flow
Increase discharge
Increase velocity
Maintain pressure difference