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MCQs 1: In a surface condenser if air is removed, there is___________?

fall in absolute pressure maintained in condenser rise in absolute pressure maintained in condenser no change in absolute pressure in the condenser rise in temperature of condensed steam
Answer Explanation

MCQs 2: In a shell and tube surface condenser____________?

steam and cooling water mix to give the condensate cooling water passes through the tubes and steam surrounds them steam passes through the cooling tubes and cooling water surrounds them all of the above varying with situation
Answer Explanation

MCQs 3: In jet type condensers___________?

cooling water passes through tubes and steam surrounds them steam passes through tubes and cooling water surrounds them steam and cooling water mix steam and cooling water do not mix
Answer Explanation

MCQs 4: The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is_____________?

higher lower same as long as initial pressure and temperature is unchanged none of the above
Answer Explanation

MCQs 5: In steam turbines the reheat factor_____________?

increases with the increase in number of stages decreases with the increase in number of stages remains same irrespective of number of stages none of the above
Answer Explanation

MCQs 6: Steam turbines are governed by the following methods_____________?

Throttle governing Nozzle control governing By-pass governing all of the above
Answer Explanation

MCQs 7: The value of reheat factor normally varies from___________?

0.5 to 0.6 0.9 to 0.95 1.02 to 1.06 1.2 to 1.6
Answer Explanation

MCQs 8: Reheat factor in steam turbines depends on______________?

exit pressure only stage efficiency only initial pressures and temperature only all of the above
Answer Explanation

MCQs 9: For Parson’s reaction steam turbine, degree of reaction is____________?

75% 100% 50% 60%
Answer Explanation

MCQs 10: Parson’s turbine is___________?

pressure compounded steam turbine simple single wheel, impulse steam turbine simple single wheel reaction steam turbine multi wheel reaction steam turbine
Answer Explanation

MCQs 11: Rateau steam turbine is______________?

reaction steam turbine velocity compounded impulse steam turbine pressure compounded impulse steam turbine pressure velocity compounded steam turbine
Answer Explanation

MCQs 12: Curtis turbine is_____________?

reaction steam turbine pressure velocity compounded steam turbine pressure compounded impulse steam turbine velocity compounded impulse steam turbine
Answer Explanation

MCQs 13: Incase of reaction steam turbine___________?

there is enthalpy drop both in fixed and moving blades there is enthalpy drop only in fixed blades there is enthalpy drop only in moving blades none of the above
Answer Explanation

MCQs 14: In De Laval steam turbine___________?

the pressure in the turbine rotor is approximately same as in con¬denser the pressure in the turbine rotor is higher than pressure in the con¬denser the pressure in the turbine rotor gradually decreases from inlet to exit from condenser none from the above
Answer Explanation

MCQs 15: The pressure on the two sides of the impulse wheel of a steam turbine_____?

is same is different increases from one side to the other side decreases from one side to the other side
Answer Explanation

MCQs 16: In case of impulse steam turbine_____________?

there is enthalpy drop in fixed and moving blades there is enthalpy drop only in moving blades there is enthalpy drop in nozzles none of the above
Answer Explanation

MCQs 17: The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?

increase in dryness fraction of exit steam decrease in dryness fraction of exit steam no change in the quality of exit steam decrease or increase of dryness fraction of exit steam depending upon inlet quality
Answer Explanation

MCQs 18: The effect of considering friction losses in steam nozzle for the same pressure ratio leads to________?

increase in exit velocity from the nozzle decrease in exit velocity from the nozzle no change in exit velocity from the nozzle increase or decrease depending upon the exit quality of steam
Answer Explanation

MCQs 19: The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation?

pv = C pv1A = C pv1i = C pv
Answer Explanation

MCQs 20: The critical pressure ratio of a convergent nozzle is defined as_____________?

the ratio of outlet pressure to inlet pressure of nozzle the ratio of inlet pressure to outlet pressure of nozzle the ratio of outlet pressure to inlet pressure only when mass flow rate per unit area is minimum the ratio of outlet pressure to inlet pressure only when mass flow rate = c
Answer Explanation

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