Electrical Engineering MCQs

Page No. 306

Parson’s turbine is___________?


a pressure compounded steam turbine


bsimple single wheel, impulse steam turbine


csimple single wheel reaction steam turbine


dmulti wheel reaction steam turbine



Rateau steam turbine is______________?


aRateau steam turbine is______________?


bvelocity compounded impulse steam turbine


cpressure compounded impulse steam turbine


dpressure velocity compounded steam turbine



Curtis turbine is_____________?


areaction steam turbine


bpressure velocity compounded steam turbine


cpressure compounded impulse steam turbine


dpressure compounded impulse steam turbine



Incase of reaction steam turbine___________?


athere is enthalpy drop both in fixed and moving blades


bthere is enthalpy drop only in fixed blades


cthere is enthalpy drop only in moving blades


dnone of the above



In De Laval steam turbine___________?


athe pressure in the turbine rotor is approximately same as in con¬denser


b the pressure in the turbine rotor is higher than pressure in the con¬denser


cthe pressure in the turbine rotor gradually decreases from inlet to exit from condenser


d none from the above



The pressure on the two sides of the impulse wheel of a steam turbine_____?


ais same


b is different


c increases from one side to the other side


ddecreases from one side to the other side


View Answer is same

In case of impulse steam turbine_____________?


athere is enthalpy drop in fixed and moving blades


b there is enthalpy drop only in moving blades


cthere is enthalpy drop in nozzles


dnone of the above



The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?


aincrease in dryness fraction of exit steam


b decrease in dryness fraction of exit steam


cno change in the quality of exit steam


ddecrease or increase of dryness fraction of exit steam depending upon inlet quality



The effect of considering friction losses in steam nozzle for the same pressure ratio leads to________?


aincrease in exit velocity from the nozzle


bdecrease in exit velocity from the nozzle


cno change in exit velocity from the nozzle


dincrease or decrease depending upon the exit quality of steam



The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation?


apv = C


bpv1A = C


cpv1i = C


dpv


View Answer pv

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