Steam and Gas Turbines Questions for entrance exams on “Requirements for Radial Equilibrium and Velocity Diagrams”.
1. For radial equilibrium axial flow is assumed.
a) True
b) False
Answer: b
Clarification: For radial equilibrium asymmetrical flow is assumed.
2. For radial equilibrium constant velocity is assumed.
a) True
b) False
Answer: a
Clarification: 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
Answer: a
Clarification: 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
Answer: c
Clarification: 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
Answer: b
Clarification: For radial equilibrium the flow is assumed to be asymmetrical and viscous forces are assumed to be negligible.
6. In radial equilibrium method blade force is assumed to be ____________
a) high
b) low
c) zero
d) none
Answer: c
Clarification: Blade forces are assumed to be zero in radial equilibrium.
7. For radial equilibrium it is assumed that heat transfer is ____________
a) zero
b) high
c) low
d) none
Answer: a
Clarification: 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
Answer: c
Clarification: 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
Answer: b
Clarification: 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
Answer: a
Clarification: Friction is neglected in radial equilibrium.
Steam and Gas Turbines for entrance exams,