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Mechanical
ME Set-1
Steam Nozzles and Turbines
53

Steam Nozzles and Turbines MCQ with Answers

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

Steam Nozzles and Turbines MCQ with Answers

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Related Steam Nozzles and Turbines MCQ with Answers

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

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

Steam Nozzles and Turbines MCQ with Answers

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