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

The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is__________?

A. 0.555
B. 0.578
C. 0.5457
D. 0.6

The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?

A. 0.6
B. 0.578
C. 0.555
D. 0.5457

The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?

A. Pvls=c
B. Pv1126 = c
C. Pv1a = c
D. Pv = c

The efficiency of chimney is approximately______________?

A. 80%
B. 40%
C. 20%
D. 0.25%

The pressure at the furnace is minimum in case of___________?

A. Forced draught system
B. Induced draught system
C. Balanced draught system
D. Natural draught system

For the induced draught the fan is located_______________?

A. Near bottom of chimney
B. Near bottom of furnace
C. At the top of the chimney
D. Anywhere permissible