# Steam and Gas Turbines Questions and Answers – Flow Passages with Radial Equilibrium

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Flow Passages with Radial Equilibrium”.

1. Flow through turbo machinery is ________
a) one dimensional
b) two dimensional
c) three dimensional
d) none of the mentioned

Explanation: Fluid flow in turbo machinery is a three dimensional flow.

2. Third direction of the flow in turbo machinery is _______
c) heat flow direction
d) none of the mentioned

Explanation: Flow direction and tangential flow direction are the two directions and the third direction is blade height.

3. Centrifugal forces acts in ________
a) tangential direction
b) flow direction
d) none of the mentioned

Explanation: Centrifugal flow acts in the third direction that is radial direction.

4. The field produced by centrifugal force distorts the flow velocity.
a) True
b) False

Explanation: Centrifugal force produced creates a field on the flow and distorts the velocity of flow.

5. Radial equilibrium theory assumes that flow is in equilibrium before and after the fluid entering the blade.
a) True
b) False

Explanation: Radial equilibrium method assumes flow is in equilibrium before the fluid enters and after the fluid leaving the blade.
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a) True
b) False

Explanation: Radial equilibrium theory is more important for axial flow machines.

7. In radial equilibrium method centrifugal force is equated to __________
a) pressure force
b) axial force
c) centripetal force
d) none of the mentioned

Explanation: For a particle to move in constant radius centrifugal force must be equal to pressure force.

a) higher
b) zero
c) lesser
d) none of the mentioned

Explanation: In radial equilibrium method radial component must be equal to zero.

9. Stagnation enthalpy is _______ in turbo machine along the radial direction.
a) higher
b) zero
c) constant
d) none of the mentioned

Explanation: Stagnation enthalpy is constant in turbo machines along the radial flow direction.

10. Stagnation enthalpy is _________ at intake and discharge.
a) constant
b) low
c) high
d) none of the mentioned

Explanation: Stagnation enthalpy is constant in turbo machines along the radial flow direction at intake and discharge.

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