Steam Nozzles - Super Saturated Flow and Wilson's Line Online Exam Quiz
Steam Nozzles - Super Saturated Flow and Wilson's Line GK Quiz. Question and Answers related to Steam Nozzles - Super Saturated Flow and Wilson's Line. MCQ (Multiple Choice Questions with answers about Steam Nozzles - Super Saturated Flow and Wilson's Line
A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350?C and velocity of 15 m/s. The exit is at 100 kPa, x = 1 and very low velocity. Find the specific work.
A : 382.3 kJ/kg
B : 482.3 kJ/kg
C : 582.3 kJ/kg
D : 682.3 kJ/kg
Air at 600 K flows with 3 kg/s into a heat exchanger and out at 100?C. How much (kg/s) water coming in at 100 kPa, 20?C can the air heat to the boiling point?
A : 0.37 kg/s
B : 0.17 kg/s
C : 0.27 kg/s
D : 0.57 kg/s
Calculate the degree of supersaturation if steam at 10 bar 250?C is discharged at 2 bar by a convergent-divergent nozzle. Consider metastable steam expansion and negligible inlet velocity.
A : 5.65
B : 3.11
C : 2.15
D : 2.36
Calculate the enthalpy drop steam enters a convergent-divergent nozzle at 11 bar and 250?C and leaves at 1 bar. The expansion is to be considered metastable.
A : 427031.34 kJ/kg
B : 55648.32 kJ/kg
C : 323654.25 kJ/kg
D : 158469.21 kJ/kg
Considering metastable expansion to be in effect, the flow of wet steam though a convergent-divergent nozzle shall result in a discharge slightly less than the calculated one.
A : TRUE
B : FALSE
C : -
D : -
Determine the exit pressure of steam if the steam enters a nozzle at 11 bar and 300?C. At the outlet it is observed that the specific volume of the steam is 0.86804 m3/kg. The expansion of steam is metastable.
A : 4 bar
B : 3 bar
C : 2 bar
D : 1 bar
Nitrogen gas flows into a convergent nozzle at 200 kPa, 400 K and very low velocity. It flows out of the nozzle at 100 kPa, 330 K. If the nozzle is insulated find the exit velocity.
A : 681.94 m/s
B : 581.94 m/s
C : 481.94 m/s
D : none of the mentioned
Steam at 12 bar and 300?C enters a convergent-divergent steam nozzle and leaves at 3 bar. If the expansion of the steam is metastable, calculate the supercooled temperature.
A : 165?C
B : 143?C
C : 154?C
D : 120?C
Steam at 15 bar pressure and 250?C enters a convergent-divergent steam nozzle and leaves at 4 bar. The mass flow rate is 5 kg/s. Calculate the exit area of the nozzle if the expansion is metastable.
A : 0.00542187 m2
B : 0.0029147 m2
C : 0.036521 m2
D : 0.003265 m2
Steam at 20 bar and 300?C enters a convergent-divergent steam nozzle and is discharged at 3 bar. Considering the effects of supersaturation calculate the degree of undercooling.
A : 36.65?C
B : 45.54?C
C : 23.32?C
D : 62.87?C
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