Mechanical Engineering Exam > Mechanical Engineering Questions > A convergent-divergent nozzle is said to be c...
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A convergent-divergent nozzle is said to be choked when:
- a)Critical pressure is attained at the exit and Mach number at this section is sonic
- b)Velocity at the throat becomes supersonic
- c)Exit velocity becomes supersonic
- d)Mass flow rate though the nozzle reaches a maximum value
Correct answer is option 'D'. Can you explain this answer?
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A convergent-divergent nozzle is said to be choked when:a)Critical pre...
When a flowing fluid at a given pressure and temperature passes through a restriction (such as the throat of a convergent-divergent nozzle or a valve in a pipe) into a lower pressure environment the fluid velocity increases. Mass flow continues to increase with decreasing the exit pressure. Choked flow is a limiting condition where the mass flow will not increase with a further decrease in the downstream pressure environment.
A nozzle is said to be chocked when flow rate through it is maximum and at throat of nozzle M = 1
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A convergent-divergent nozzle is said to be choked when:a)Critical pre...
Choked Nozzle Condition Explanation:
Choked nozzle condition refers to the point at which the mass flow rate through the nozzle reaches its maximum value. This occurs when the flow area at the throat of the nozzle is at its minimum, causing the velocity of the flow to reach sonic conditions.
Reason for Correct Answer:
The correct answer is option 'D' because when a convergent-divergent nozzle is choked, the mass flow rate through the nozzle reaches its maximum value. This is due to the flow area at the throat being at its minimum, which causes the velocity of the flow to reach sonic conditions. At this point, the nozzle is said to be choked.
Explanation of Other Options:
- Option 'A': Critical pressure is attained at the exit and Mach number at this section is sonic. This describes the condition of the flow reaching sonic speed at the exit but does not necessarily mean the nozzle is choked.
- Option 'B': Velocity at the throat becomes supersonic. This indicates the flow velocity exceeding the speed of sound at the throat, but it does not necessarily mean the nozzle is choked.
- Option 'C': Exit velocity becomes supersonic. This implies the flow velocity exceeding the speed of sound at the exit, but it does not necessarily mean the nozzle is choked.
In conclusion, the choked condition of a convergent-divergent nozzle occurs when the mass flow rate reaches its maximum value due to the flow area at the throat being at its minimum, causing the velocity to reach sonic conditions.
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A convergent-divergent nozzle is said to be choked when:a)Critical pressure is attained at the exit and Mach number at this section is sonicb)Velocity at the throat becomes supersonicc)Exit velocity becomes supersonicd)Mass flow rate though the nozzle reaches a maximum valueCorrect answer is option 'D'. Can you explain this answer?
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A convergent-divergent nozzle is said to be choked when:a)Critical pressure is attained at the exit and Mach number at this section is sonicb)Velocity at the throat becomes supersonicc)Exit velocity becomes supersonicd)Mass flow rate though the nozzle reaches a maximum valueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A convergent-divergent nozzle is said to be choked when:a)Critical pressure is attained at the exit and Mach number at this section is sonicb)Velocity at the throat becomes supersonicc)Exit velocity becomes supersonicd)Mass flow rate though the nozzle reaches a maximum valueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A convergent-divergent nozzle is said to be choked when:a)Critical pressure is attained at the exit and Mach number at this section is sonicb)Velocity at the throat becomes supersonicc)Exit velocity becomes supersonicd)Mass flow rate though the nozzle reaches a maximum valueCorrect answer is option 'D'. Can you explain this answer?.
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