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


bboiler evaporative capacity


cfactor of evaporation


dboiler efficiency


View Answer boiler efficiency

Boiler H.P. is defined as the ________________ ?


asteam evaporation rate per kg of fuel fired


bsteam evaporation rate per kg of fuel fired


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



The fusible plug in small boilers is located ________________?


ain the drum


bin the fire tubes


cabove steam dome


dover the combustion chamber



The number of drums in Benson steam generator is_________________?


aone


btwo


cone steam drum and one water drum


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


ccombined separating and throttling calorimeter


dbucket calorimeter



The difference between cornish boiler and lancashire boiler is that_________________?


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


bformer is water tube type and latter is fire tube type


cformer contains one fire tube and latter contains two fire tubes


dnone/of the above



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


ahorizontal straight line


bvertical straight line


cstraight inclined line


dcurved line



On Millier chart, the constant pressure lines_________________?


adiverge from left to right


bdiverge from right to left


care equally spaced throughout


dfirst rise up and then fall



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


a78-81%


b81-85%


c85-90%


d90-95%


View Answer 78-81%

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


aboil


bflash i.e. get converted into steam


cremain as it was


dcool down



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