For minimum work required to compress and deliver a quantity of air by multistage compression

A The compression ratio in each stage should be same
B The intercooling should be perfect
C The work-done in each stage should be same
D All of the above

Correct Answer: All of the above

For minimum work required to compress and deliver a quantity of air by multistage compression-The compression ratio in each stage should be same-The intercooling should be perfect- The work-done in each stage should be same
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#Mechanical Engineering #Compressors #Gas Turbines And Jet Engines

Related Questions

For minimum work in multistage compression, assuming same index of compression in all stages
A Work done in first stage should be more
B Work done in subsequent stages should increase
C Work done in subsequent stages should decrease
D Work done in all stages should be equal
Multistage compression of air as compared to single stage compression offers the advantage of
A Power saving per unit weight of air delivered
B Moisture elimination in the inter-stage cooler
C Increased volumetric efficiency
D All of the above
A hawker takes 1.25 hours to deliver newspapers on his route. Another hawker takes 15 minutes longer to deliver these papers on the same route. How long would it take to deliver the papers if both of them worked together?
A 22.25 min
B 37.5 min
C 40 min
D 65 min
A hawker takes 1.25 hours to deliver newpaper on his route. Another howker takes 15 minutes longer to deliver these papers on the same route. How long would it take to deliver the papers if both of them worked together?
A 22.25 minute
B 37.5 minutes
C 40 minutes
D 65 minitues
The advantage of multistage compression over single stage compression is
A Lower power consumption per unit of air delivered
B Higher volumetric efficiency
C Decreased discharge temperature
D All of the above
The most efficient method of compressing air is to compress it
A Isothermally
B Adiabatically
C Isentropically
D Isochronically
In multistage compressor, the isothermal compression is achieved by
A Employing inter-cooler
B By constantly cooling the cylinder
C By running compressor at very slow speed
D By insulating the cylinder
Which is false statement about multistage compression?
A Power consumption per unit of air delivered is low
B Volumetric efficiency is high
C It is best suited for compression ratios around 7 : 1
D The moisture in air is condensed in the inter-cooler
Multistage compression is necessary for high efficiency,
A If the ratio of the delivery pressure to the intake pressure exceeds 5:1
B When large amount of gas is to be compressed
C When the delivered gas is desired at very high velocity
D None of these
Which DOS command allows you to compress existing disks and to create new compressed volumes?
A DEFRAG
B DBLSPACE
C SCANDISK
D MSAV
E None of the above

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