Mechanical Engineering · all questions

Compressors, Gas Turbines And Jet Engines
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Q201

The pressure and temperature conditions of air at the suction of compressor are

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Q202

If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Diameter of L.P. cylinder and D₂ = Diameter of H.P. cylinder)

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Q203

In n₁ and n₂ are the indices of compression for the first and second stage of compression, then the ratio of work-done on the first and second stages

(\frac{W _{1}}{W _{2}})

with perfect intercooling is given by

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Q204

If p₁ is the pressure of air entering the L.P. cylinder and p₃ is the pressure of air leaving the H.P. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by

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Q205

Volumetric efficiency of a compressor decreases with ________ in compression ratio.

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Q206

In multistage compressor, the isothermal compression is achieved by

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Q207

In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

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Q208

Out of the following, from where you will prefer to take intake for air compressor

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Q209

For supplying intermittent small quantity of air at high pressure, following compressor is best suited

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Q210

The thrust on the rotor in a centrifugal compressor is produced by

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Q211

In a reciprocating air compressor, the compression work per kg of air

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Q212

Work ratio of a gas turbine plant is ratio of

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Q213

Actual compression curve is

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Q214

The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

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Q215

The volume of air delivered by the compressor is called

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Q216

The absolute pressure of air at the outlet of a compressor is called

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Q217

The ratio of work done per cycle to the swept volume in case of compressor is called

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Q218

Axial flow compressor resembles

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Q219

Cylinder clearance in a compressor should be

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Q220

The volumetric efficiency for reciprocating air compressors is about

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