| 1. | The main object of a boiler trial is ? | |
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to determine the generating capacity of the boiler
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to determine the thermal efficiency of the boiler when working at a definite pressure
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to prepare heat balance sheet for the boiler
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all of the above
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Report Question| 2. | Lancashire boiler is used where working pressure and power required are ? | |
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low
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moderate
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high
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none of these
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| 3. | Clearance ratio is the ratio of ? | |
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clearance volume to the swept volume
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clearance volume to the volume at cut-off
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volume at cut-off to the swept volume
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swept volume to the clearance volume
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| 4. | The Locomotive boiler has ? | |
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137 fire tubes and 44 superheated tubes
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147 fire tubes and 34 superheated tubes
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157 fire tubes and 24 superheated tubes
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167 fire tubes and 14 superheated tubes
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| 5. | The relative efficiency is defined as the ? | |
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ratio of thermal efficiency to Rankine efficiency
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ratio of brake power to the indicated power
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ratio of heat equivalent to indicated power to the energy supplied in steam
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product of thermal efficiency and Rankine efficiency
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| 6. | A device used to increase the temperature of saturated steam without raising its pressure, is called ? | |
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blow off cock
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fusible plug
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superheater
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stop valve
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| 7. | For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be ? | |
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one-half the height of chimney
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equal to the height of chimney
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two times the height of chimney
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four times the height of chimney
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| 8. | Which of the following boiler works on a forced circulation of water ? | |
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La-mont boiler
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Benson boiler
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Loeffler boiler
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all of these
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| 9. | The heat balance sheet for the boiler shows the ? | |
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complete account of heat supplied by 1 kg of dry fuel and the heat consumed
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moisture present in the fuel
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steam formed by combustion of hygrogen per kg of fuel
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all of the above
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| 10. | For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is ............. the piston speed of single acting steam engine ? | |
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equal to
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twice
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three times
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four times
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