Power Generation

Rateau steam turbine is______________?

A. reaction steam turbine
B. velocity compounded impulse steam turbine
C. pressure compounded impulse steam turbine
D. pressure velocity compounded steam turbine

Curtis turbine is_____________?

A. reaction steam turbine
B. pressure velocity compounded steam turbine
C. pressure compounded impulse steam turbine
D. velocity compounded impulse steam turbine

Incase of reaction steam turbine___________?

A. there is enthalpy drop both in fixed and moving blades
B. there is enthalpy drop only in fixed blades
C. there is enthalpy drop only in moving blades
D. none of the above

In De Laval steam turbine___________?

A. the 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
C. the 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_____?

A. is same
B. is different
C. increases from one side to the other side
D. decreases from one side to the other side

In case of impulse steam turbine_____________?

A. there is enthalpy drop in fixed and moving blades
B. there is enthalpy drop only in moving blades
C. there is enthalpy drop in nozzles
D. none of the above

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

A. increase in dryness fraction of exit steam
B. decrease in dryness fraction of exit steam
C. no change in the quality of exit steam
D. decrease 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________?

A. increase in exit velocity from the nozzle
B. decrease in exit velocity from the nozzle
C. no change in exit velocity from the nozzle
D. increase 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?

A. pv = C
B. pv1A = C
C. pv1i = C
D. pv

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

A. the ratio of outlet pressure to inlet pressure of nozzle
B. the ratio of inlet pressure to outlet pressure of nozzle
C. the ratio of outlet pressure to inlet pressure only when mass flow rate per unit area is minimum
D. the ratio of outlet pressure to inlet pressure only when mass flow rate = c