Mechanical Engineering MCQs

Page No. 11

The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?


aboiler effectiveness

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bboiler evaporative capacity

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cfactor of evaporation

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dboiler efficiency

✓


View Answer boiler efficiency

Boiler H.P. is defined as the ________________ ?


asteam evaporation rate per kg of fuel fired

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bsteam evaporation rate per kg of fuel fired

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cthe evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam

✓


dwork done by 1 kg of steam at saturation condition

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The fusible plug in small boilers is located ________________?


ain the drum

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bin the fire tubes

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cabove steam dome

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dover the combustion chamber

✓



The number of drums in Benson steam generator is_________________?


aone

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btwo

✖


cone steam drum and one water drum

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dno drum

✓


View Answer no drum

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?


athrottling calorimeter

✓


bseparating calorimeter

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ccombined separating and throttling calorimeter

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dbucket calorimeter

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The difference between cornish boiler and lancashire boiler is that_________________?


aformer is fire tube type and latter is water tube type boiler

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bformer is water tube type and latter is fire tube type

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cformer contains one fire tube and latter contains two fire tubes

✓


dnone/of the above

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On Mollier chart, flow through turbine is represented by ________________?


ahorizontal straight line

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bvertical straight line

✓


cstraight inclined line

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dcurved line

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On Millier chart, the constant pressure lines_________________?


adiverge from left to right

✓


bdiverge from right to left

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care equally spaced throughout

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dfirst rise up and then fall

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The bituminous coal is non-caking if its carbon content is_______________?


a78-81%

✓


b81-85%

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c85-90%

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d90-95%

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View Answer 78-81%

Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?


aboil

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bflash i.e. get converted into steam

✓


cremain as it was

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dcool down

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