# Steam and Gas Turbines Questions and Answers – Requirements for Radial Equilibrium and Velocity Diagrams

This set of Steam and Gas Turbines Questions for entrance exams focuses on “Requirements for Radial Equilibrium and Velocity Diagrams”.

1. For radial equilibrium axial flow is assumed.
a) True
b) False

Explanation: For radial equilibrium asymmetrical flow is assumed.

2. For radial equilibrium constant velocity is assumed.
a) True
b) False

Explanation: For radial equilibrium meridional velocity is assumed to be constant.

3. For simple radial equilibrium it is assumed that ______________
a) r*Vu = constant
b) r/Vu = constant
c) Vu/r = constant
d) None of the mentioned

Explanation: For a free vortex in a radial equilibrium it is assumed that the product of radius and velocity has remained as constant.

4. Secondary losses are caused due to _________
a) frictional forces
b) lift force induced in turbine
c) drag force induced by secondary force
d) none of the mentioned

Explanation: Secondary losses are caused due to drag forces induced by secondary forces.

5. For radial equilibrium it is assumed that viscosity is __________
a) high
b) negligible
c) low
d) none of the mentioned

Explanation: For radial equilibrium the flow is assumed to be asymmetrical and viscous forces are assumed to be negligible.
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6. In radial equilibrium method blade force is assumed to be ____________
a) high
b) low
c) zero
d) none

7. For radial equilibrium it is assumed that heat transfer is ____________
a) zero
b) high
c) low
d) none

Explanation: For radial equilibrium it is assumed that the flow is non viscous flow and heat transfer is zero.

8. For radial equilibrium entropy term is _________
a) high
b) low
c) neglected
d) none of the mentioned

Explanation: For radial equilibrium method entropy term is neglected.

9. For radial equilibrium it is assumed that the steam lines are ___________ to the axis line.
a) perpendicular
b) parallel
c) inclined
d) none of the mentioned

Explanation: For radial equilibrium it is assumed that the steam lines are axis parallel and have no inclination.

10. For radial equilibrium friction is neglected.
a) True
b) False

Explanation: Friction is neglected in radial equilibrium.

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