Question

What is the correct sequence in increasing order of air handling/compressing machines based on the pressure ratios?
1. Air blower, axial flow fan, centrifugal compressor and reciprocating compressor
2. Axial flow fan, centrifugal compressor, air blower and reciprocating compressor
3. Air blower, centrifugal compressor, axial flow fan, and reciprocating compressor
4. Axial flow fan, air blower, centrifugal compressor and reciprocating compressor

Answer 1

Correct Answer - Option 4 : Axial flow fan, air blower, centrifugal compressor and reciprocating compressor

Concept:

The correct sequence in increasing order of air handling/compressor machines with pressure ratio are given below

Fan (1bar) < Blower (1.2bar) < axial flow compressor (2bar) < centrifugal compressor (2.5bar) < Reciprocating compressor (more than 5bar)