1. On the X-axis the circles with their center are ________
(A) eccentric circles
(B) concentric circles
(C) potential lines
(D) equal circles
2. ______ is formed by the free vortex flow
(A) straight lines
(B) concentric circles
(C) parabola
(D) hyperbola
3. Source flow and uniform flow combination gives flow past a _____
(A) Cylinder
(B) Half body
(C) Full body
(D) Wedge
4. On the surface a body floats when _______
(A) Metacenter is above gravity
(B) Metacenter is below gravity
(C) Metacenter is equal to gravity
(D) Gravity is above the metacenter
5. Vortex flow is ________ except at the origin where r=0.
(A) rotational
(B) laminar
(C) irrotational
(D) turbulent
6. By using ______the center of pressure can be calculated.
(A) Principle of moments
(B) Principle of energy
(C) Mass conservation
(D) Rayleigh’s principle
7. Vortex flow’ strength can be given by _________
(A) G = 2πC
(B) G = 2π
(C) G = -2πC
(D) G = 0