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ME Set-1
Steam Nozzles and Turbines
109

Steam Nozzles and Turbines MCQ with Answers

109) The maximum efficiency of a De-Laval turbine is (where ? = Nozzle angle)

sin² ?

cos² ?

tan² ?

cot² ?

Answer is:

cos² ?

Steam Nozzles and Turbines MCQ with Answers

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Related Steam Nozzles and Turbines MCQ with Answers

110) The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

same

less

more

none of these

Answer is:

more

111) In a reaction turbine when the degree of reaction is zero, then there is

no heat drop in moving blades

no heat drop in fixed blades

maximum heat drop in moving blades

maximum heat drop in fixed blades

Answer is:

no heat drop in moving blades

112) The effect of friction in the nozzle __________ dryness fraction of steam.

has no effect on

decreases

increases

none of these

Answer is:

increases

113) In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30 Degree. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

160/3 m/s

320/3 m/s

640/3 m/s

640 m/s

Answer is:

640/3 m/s

Steam Nozzles and Turbines MCQ with Answers

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