Civil Engineering - Airport Engineering - Discussion

Discussion :: Airport Engineering - Section 1 (Q.No.9)

9. 

An aircraft is flying in an atmosphere of 30°C with a speed of 1260 km ph. Its speed is known as

[A]. subsonic
[B]. sonic
[C]. super-sonic
[D]. Mach.

Answer: Option B

Explanation:

No answer description available for this question.

Pooj said: (Feb 24, 2017)  
How it is considered? Please explain it.

Devendra Singh said: (Apr 12, 2017)  
How sonic speed? please give full description.

Chhaya said: (May 4, 2017)  
Sound speed is 1235 km/h on 20C if speed is around that speed called sonic speed.

Below that Subsonic.

More then That Supersonic.

5 times more then that called hypersonic.

Tanuj said: (Aug 15, 2017)  
The formula to find the speed of sound in air is as follows:
v = 331m/s + 0.6m/s/C * T.
Here T=30deg.
v=350m/s or 1257 kmph almost equal to 1260kmph. can be said sonic.

Aditya said: (Sep 27, 2019)  
Right @Tanuj.

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