Engineering Questions with Answers - Multiple Choice Questions
MCQs on Important Cases of Super Imposed Flow
1 - Question
When a uniform flow is flowing through a doublet, resultant flow obtained is
a) Flow past a Rankine oval of equal axes
b) Flow past a circular cylinder
c) All of the mentioned
d) None of the mentioned
View Answer
c
Explanation: They both mean the same thing. They are different ways of interpreting the same phenomenon.
2 - Question
How many stagnation points are present in a source and sink pair in a uniform flow
a) Two
b) Three
c) One
d) None
View Answer
a
Explanation: There are two stagnation points are present in a source and sink pair in a uniform flow.
3 - Question
Which of the following is not a type of superimposed flow?
a) Source and sink pair in uniform flow.
b) Double flow
c) A source and sink pair in turbulent flow.
d) A plane source in uniform flow
View Answer
c
Explanation: There is no such kind of superimposed flow.
4 - Question
In the equation for steam function due to source steam function is inversely proportional to magnitude at discharge
a) True
b) False
View Answer
a
Explanation: Steam function is directly proportional to magnitude of discharge.
5 - Question
Streamlines of doublet flow are family of circles tangent to a common axis.
a) True
b) False
View Answer
Streamlines of doublet flow are family of circles tangent to a common axis.
a) True
b) False
6 - Question
What is the characteristic of stagnation point
a) Velocity is zero
b) Acceleration is uniform
c) Velocity is zero
d) Acceleration is zero
View Answer
a
Explanation: At stagnation point velocity is zero, as the fluid comes at rest. This characteristic at stagnation point.
7 - Question
Potential lines for the source-sink pair will be eccentric non intersecting circles with their centers on the axis.
a) True
b) False
View Answer
b
Explanation: The potential line for the source sink pair will be eccentric non intersecting circles with their centers on the axis.
8 - Question
What is the term used for a case where source and sink( both of them are of equal magnitude) approach each other such, distance between them reduces and product of distance and discharge magnitude remains constant.
a) A plain pair
b) A doublet source in uniform
c) Hagen Poiseuille flow
d) Coutte flow
View Answer
b
Explanation: This is a special case of superimposed flow called double flow.
9 - Question
What type of flow is obtained by superimposing two definite flow types{( considering ideal condition)
a) Ideal
b) Potential
c) Both
d) None of the mentioned
View Answer
c
Explanation: Any linear combination of two different types of flows will result in a potential and ideal flow.
10 - Question
The nature of streamlines in a flow net obtained by the combination of source and sink is-
a) Linear
b) Curvilinear
c) Circular
d) Random
View Answer
c
Explanation: The combination of the source and sink would result in a flow net where streamlines will be circular axes.