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

Correct Answer: When the cross-section of the nozzle decreases continuously from entrance to exit

Bissoy MCQ
#Mechanical Engineering #Steam Boilers #Engines #Nozzles And Turbines

Related Questions

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
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
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
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 length of the divergent cone in a Venturimeter is __________ that of the convergent cone.
A Equal to
B Double
C Three to four times
D Five to six times
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
A Equal to
B One-half
C Three fourth
D Double
The divergent portion of a Venturimeter is made longer than convergent portion in order to
A Avoid the tendency of breaking away the stream of liquid
B To minimize frictional losses
C Both (A) and (B)
D None of these
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

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