A) Incidence angle of the approaching air is measured from the trailing edge of the blade
B) \[\delta \] Is the deviation angle between the, angle of incidence and tangent to the amber line
C) The deflection of the gas steam while passing through the cascade is given by \[\varepsilon ={{\alpha }_{1}}-{{\alpha }_{2}}\]
D) \[\varepsilon \] Is the sum of the angle of incidence and camber less any deviation angle, i.e. \[\varepsilon =i+\theta -\delta \]
Correct Answer: A
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