# Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion

Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 1 (Q.No. 1)

1.

In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be

Discussion:

30 comments Page 1 of 3.
Aneesh Paum said:
3 years ago

@All.

The pressure mentioned in the question are the Delivery pressure. If we assume P2 as 1 bar and P4 as 16 bar, then only P5 comes as 64 bar.

The pressure mentioned in the question are the Delivery pressure. If we assume P2 as 1 bar and P4 as 16 bar, then only P5 comes as 64 bar.

(1)

Brajesh lakhera said:
3 years ago

The delivery pressure at the fourth stage means p5.

So p1 is 1.

P2 is 4.

P3 is 16.

P4 is 64.

P5 is 256.

So option D. 256 should be correct.

So p1 is 1.

P2 is 4.

P3 is 16.

P4 is 64.

P5 is 256.

So option D. 256 should be correct.

(4)

Hithuman45 said:
4 years ago

Good explanation, thanks @Suresh.

(1)

Munish said:
4 years ago

P2/p1 = p3/p2 = p4/p3 By using this we will get the answer.

(5)

JYOTI DUTTA said:
4 years ago

In third stage, why intercooler isb fitted. And how the pressure is increasing? Can anyone briefly destribe about this topic?

Bawa said:
4 years ago

Thanks @Suresh.

Tarik said:
4 years ago

D is the answer.

Sekhar said:
4 years ago

The answer must be" D".

Because delivery pressure at the fourth stage means we should find P5, not P4. So P5 = 4^4.

Because delivery pressure at the fourth stage means we should find P5, not P4. So P5 = 4^4.

Vinod said:
4 years ago

Why 256 bar is wrong? Explain.

Savan kumar said:
4 years ago

Thank you @Suresh.

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