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Engineering
Mechanical
ME Set-1
Steam Nozzles and Turbines
51

Steam Nozzles and Turbines MCQ with Answers

51) The flow of steam is super-sonic

at the entrance to the nozzle

at the throat of the nozzle

in the convergent portion of the nozzle

in the divergent portion of the nozzle

Answer is:

in the divergent portion of the nozzle

Steam Nozzles and Turbines MCQ with Answers

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Related Steam Nozzles and Turbines MCQ with Answers

52) The pressure of steam at throat of a steam nozzle is called critical pressure.

Agree

Disagree

Answer is:

Agree

53) For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.

Correct

Incorrect

Answer is:

Correct

54) De-Laval turbine is a

simple impulse turbine

simple reaction turbine

impulse-reaction turbine

none of these

Answer is:

simple impulse turbine

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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