Bernoulis can be applied between any two points on a streamline of rotational fluid flow?
Anonymous Poll
64%
True
36%
False
The answer to the above poll is
True- In a streamline flow even if the flow field is rotational we can apply Bernoulis equation.
Here is the link of NPTEL about it - https://nptel.ac.in/content/storage2/courses/112104118/lecture-14/14-1_bernouli_eqn_irrotational_flow.htm
True- In a streamline flow even if the flow field is rotational we can apply Bernoulis equation.
Here is the link of NPTEL about it - https://nptel.ac.in/content/storage2/courses/112104118/lecture-14/14-1_bernouli_eqn_irrotational_flow.htm
In which of the turbines velocity of flow is always equal at the inlet and exit?
Anonymous Poll
24%
1 Francis
42%
2 Kaplan
18%
3 Pelton
15%
4 All of these
Fundamentals of Mechanical Engineering ❤️ pinned «In which of the turbines velocity of flow is always equal at the inlet and exit?»
In Ideal Brayton cycle for Maximum thermal efficiency the work outpot will be 0
Anonymous Poll
54%
True
37%
False
9%
Cannot say
Fundamentals of Mechanical Engineering ❤️ pinned «In Ideal Brayton cycle for Maximum thermal efficiency the work outpot will be 0»
Centre of Mohr circle is always on X axis
Anonymous Poll
71%
True
12%
False
17%
Can be anywhere in the xy plane
Fundamentals of Mechanical Engineering ❤️
In which of the turbines velocity of flow is always equal at the inlet and exit?
The answer to this poll is
Kaplan Turbine - Velocity of flow will be equal in Kaplan turbine because it is an Axial flow turbine and inlet and exit area are same.
So discharge will be A1Vf1=A2Vf2
(A1=A2)
Hence Vf1=Vf2
Kaplan Turbine - Velocity of flow will be equal in Kaplan turbine because it is an Axial flow turbine and inlet and exit area are same.
So discharge will be A1Vf1=A2Vf2
(A1=A2)
Hence Vf1=Vf2
Fundamentals of Mechanical Engineering ❤️
In Ideal Brayton cycle for Maximum thermal efficiency the work outpot will be 0
The answer to this poll is
True- For maximum thermal efficiency when we compress the gas upto maximum material limit condition we cannot apply further heat from outside hence area on TS diageam gives net heat or work done by the cycle which is 0 in this particular case.
True- For maximum thermal efficiency when we compress the gas upto maximum material limit condition we cannot apply further heat from outside hence area on TS diageam gives net heat or work done by the cycle which is 0 in this particular case.
Fundamentals of Mechanical Engineering ❤️
Centre of Mohr circle is always on X axis
The answer to the poll is True
The centre of Mohr's Circle has to be on the x axis for stable equilibrium.
The shear stress values will change and the there will be external moment due to the extra value of shear stress which will rotate the body.
So it is a must condition that origin of Mohr circle should be on the X axis.
The centre of Mohr's Circle has to be on the x axis for stable equilibrium.
The shear stress values will change and the there will be external moment due to the extra value of shear stress which will rotate the body.
So it is a must condition that origin of Mohr circle should be on the X axis.
For having same cross sectional area which shaft should be preffered for Power Transmission?
Anonymous Poll
27%
1 Solid Shaft
71%
2 Hollow Shaft
2%
3 Any one
By Reheating in Rankine Power plant, mean temperature of heat addition
Anonymous Poll
10%
1 Decreases
79%
2 Increases
11%
3 Can't say
Formation of Bainite can be shown in equilibrium Iron carbon diagram having Temperature at y axis and composition at x axis?
Anonymous Poll
52%
1 True
48%
2 False
Fundamentals of Mechanical Engineering ❤️
By Reheating in Rankine Power plant, mean temperature of heat addition
The answer to this poll is
Increases-As we increase mean temperature of heat addition we reduce the temperature difference and hence inturn we reduce entropy because entropy increases for finite temp difference.
Increases-As we increase mean temperature of heat addition we reduce the temperature difference and hence inturn we reduce entropy because entropy increases for finite temp difference.
Fundamentals of Mechanical Engineering ❤️
Formation of Bainite can be shown in equilibrium Iron carbon diagram having Temperature at y axis and composition at x axis?
The answer to this poll is
False-Formation of bainite can be shown in non equilibrium diagram, or Temp-time diagram.
False-Formation of bainite can be shown in non equilibrium diagram, or Temp-time diagram.
For a given cross sectional area and young's modulus when slenderness ratio increases the buckling tendency
Anonymous Poll
48%
1 Increases
48%
2 Decreases
3%
3 Data is not sufficient
The answe to the above poll is
Increases- For a given cross section and young's modulus, buckling load and Slenderness ratio are inversely proprtional. So when slenderness ratio will increase then buckling load has to decrease which means the object will have more chance to buckle.
Increases- For a given cross section and young's modulus, buckling load and Slenderness ratio are inversely proprtional. So when slenderness ratio will increase then buckling load has to decrease which means the object will have more chance to buckle.
The diameter of laminar fluid flowing through a pipe of diameter d triples then pressure head loss will decrease by factor of
Anonymous Poll
26%
1 1/27
44%
2 1/81
18%
3 1/9
12%
4 Remains same
The answer to the above poll is
2 1/81
Hagen–Poiseuille equation gives head loss in a pipe having laminar flow. From the equation we can conclude that head loss is inversely proportional to d^4.
2 1/81
Hagen–Poiseuille equation gives head loss in a pipe having laminar flow. From the equation we can conclude that head loss is inversely proportional to d^4.