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 min-imum
D the ratio of outlet pressure to inlet pressure only when mass flow rate = c

Correct Answer: the ratio of outlet pressure to inlet pressure only when mass flow rate = c

Bissoy MCQ
#Electrical Engineering #Power Plant Engineering In EE

Related Questions

A nozzle is said to be a convergent nozzle
A When the cross-section of the nozzle increases continuously from entrance to exit
B When the cross-section of the nozzle decreases continuously from entrance to exit
C When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
D None of the above
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
A Remains constant
B Decreases
C Increases
D None of these
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
A policy taken with critical illness rider benefit is being assigned. Which type of assignment would suit the intended purpose because if the life insured is diagnosed with a critical illness, he only should receive the critical illness rider claim?
A Absolute assignment
B Conditional assignment
C Loan assignment
D Collateral assignment
A nozzle is said to be a divergent nozzle
A When the cross-section of the nozzle increases continuously from entrance to exit
B When the cross-section of the nozzle decreases continuously from entrance to exit
C When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
D None of the above
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the
A Length is shorter
B Throat diameter is more
C Sudden expansion of flow in the downstream occurs
D Distance between the throat and the inlet is more
When the nozzle operates with the maximum mass flow, the nozzle is said to be
A Choked
B Under-damping
C Over-damping
D None of these
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

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