QuestionJuly 17, 2025

Select the choice that best completes the following statement. The difference between a convergent-divergent nozzle and a convergent nozzle is that a convergent-divergent nozzle: a) The nozzle throat decreases, then flares b) Turbulence is greater c) Air velocity is difficult to control d) Nozzle pressure exceeds system pressure II

Select the choice that best completes the following statement. The difference between a convergent-divergent nozzle and a convergent nozzle is that a convergent-divergent nozzle: a) The nozzle throat decreases, then flares b) Turbulence is greater c) Air velocity is difficult to control d) Nozzle pressure exceeds system pressure II
Select the choice that best completes the following statement.
The difference between a convergent-divergent nozzle and a convergent nozzle is that a convergent-divergent nozzle:
a) The nozzle throat decreases, then flares
b) Turbulence is greater
c) Air velocity is difficult to control
d) Nozzle pressure exceeds system pressure
II

Solution
4.1(239 votes)

Answer

a) The nozzle throat decreases, then flares Explanation 1. Identify the function of a convergent-divergent nozzle A convergent-divergent nozzle is designed to accelerate a fluid to supersonic speeds by first converging to increase velocity and then diverging to further accelerate the flow beyond the speed of sound. 2. Compare with a convergent nozzle A convergent nozzle only accelerates the fluid up to sonic speeds at the throat, without further acceleration to supersonic speeds. 3. Analyze the options a) Correctly describes the shape of a convergent-divergent nozzle where the throat decreases and then flares out. b), c), d) do not accurately describe the primary difference in design or function between the two types of nozzles.

Explanation

1. Identify the function of a convergent-divergent nozzle<br /> A convergent-divergent nozzle is designed to accelerate a fluid to supersonic speeds by first converging to increase velocity and then diverging to further accelerate the flow beyond the speed of sound.<br /><br />2. Compare with a convergent nozzle<br /> A convergent nozzle only accelerates the fluid up to sonic speeds at the throat, without further acceleration to supersonic speeds.<br /><br />3. Analyze the options<br /> a) Correctly describes the shape of a convergent-divergent nozzle where the throat decreases and then flares out.<br /> b), c), d) do not accurately describe the primary difference in design or function between the two types of nozzles.
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