STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has

More heating surface

Heating surface depends on other parameters

Equal heating surface

Less heating surface

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YOUR ANSWER : ?

One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is

0.2

0.8

1

0.6

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The fire tubes in a Cochran boiler are

Vertical

None of these

Horizontal

Inclined

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The fire tubes in a Locomotive boiler has __________ diameter.

47.5 mm

5.47 mm

7.45 mm

4.75 mm

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The diameter of superheated tubes in a locomotive boiler is

31 mm

130 mm

230 mm

13 mm

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In a receiver type compound engine, the high pressure and low pressure cylinders

Are set in V-arrangement

Have separate piston rods

Are set at 90°

Have common piston rod

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At which pressure the properties of water and steam become identical

1 kg/cm²

225.6 kg/cm²

0.1 kg/cm²

100 kg/cm²

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For water, at pressures below atmospheric;

Melting point rises slightly and boiling point drops markedly

Melting point drops slightly and boiling point drops markedly

Melting point drops slightly and boiling point drops slightly

Melting point rises markedly and boiling point drops markedly

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A single acting steam engine produces ___ power than that of double acting steam engine.

Four times

Double

Equal

Half

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Tertiary air is the air used to

Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

Provide air around burners for obtaining optimum combustion

Cool the scanners

Transport and dry the coal

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