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ME Set-1
Steam Nozzles and Turbines
55

Steam Nozzles and Turbines MCQ with Answers

55) The impulse turbine rotor efficiency will have a maximum value of 0.5 cos² ?, where ? is the nozzle exit flow angle, if the

blades are equiangular

blade velocity coefficient is unity

blades are equiangular and frictionless

blade solidity is 0.65

Answer is:

blades are equiangular and frictionless

Steam Nozzles and Turbines MCQ with Answers

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Related Steam Nozzles and Turbines MCQ with Answers

56) When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

divergent nozzle

convergent nozzle

convergent-divergent nozzle

none of these

Answer is:

divergent nozzle

57) Rateau turbine is

simple reaction turbine

velocity compounded turbine

pressure compounded turbine

pressure-velocity compounded turbine

Answer is:

pressure compounded turbine

58) The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine.

Right

Wrong

Answer is:

Right

59) In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.

Right

Wrong

Answer is:

Right

Steam Nozzles and Turbines MCQ with Answers

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