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Cconsider the following statements: 1. Pumps used in series are generally of the centrifugal type. 2. Centrifugal pumps, though yielding comparatively smaller discharges than axial flow pumps, yield higher heads (at each stage) compared to axial flow pumps. Which of the above statements is/are correct?
Which of the following statements are correct? 1) Velocity compounded impulse turbine gives less speed and less efficiency. 2) For an ideal centrifugal compressor, the pressure produced depends on impeller velocity and diameter. 3) While flowing through the rotor blades in a gas turbine, the relative velocity of gas continuously decreases. 4) While flowing through the rotor blades in an axial flow compressor, the relative velocity of air continuously decreases.
Statement (I): The term surge indicates a phenomenon of instability which takes place at low flow values and which involves an entire system including not only the centrifugal compressor, but also the group of components traversed by the fluid upstream and downstream of it. Statement(II): Choking is defined as separation of fluid from the rotor blades of centrifugal compressor. 
Axial flow compressor has the following advantage over centrifugal compressor
The first part in both centrifugal compressor and axial compressor are similar.
Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
Arrange the following options in logical order. 1. Select the size range to which the file has to be compressed. 2. Search in google for online pdf size compressor sites. 3. Now press on the compressor button. 4. Choose and upload the file into the compressor site. 5. Download the file after compression.