Related Questions

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.
A Increases
B Decreases
C Remain same
D None of these
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
A Choked
B Under-damping
C Over-damping
D None of these
The entrance and exit curves of a rotary have
A equal radii and equal widths of pavement
B equal radii but pavement width is more at entrance than at exit curve
C equal pavement widths but radius is more at entrance curve than at exit curve
D different radii and different widths of pavement
In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will
A Increase
B Decrease
C Remain unchanged
D Either increase or decrease; depends on the coolant flow rate
The exit cone angle in case of a standard venturimeter is __________ the entrance cone angle.
A Smaller than
B Greater than
C Equal to
D Either A or B
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 friction in the nozzle __________ exit velocity of steam.
A Has no effect on
B Decreases
C Increases
D None of these
The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
A Remains same
B Decreases
C Increases
D None of these
In case of a pipe exit fitted with a nozzle, the
A Conversion of kinetic head to pressure head is facilitated
B Conversion of pressure head to kinetic head is facilitated
C Power transmitted through the nozzle is maximum, when the head lost due to friction in the pipe is equal to one third of the total supply head
D Both B and C

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