Steam Boilers, Engines, Nozzles & Turbines Mcqs
MCQ: Superheating of steam is done at_________________?
- constant volume
- constant temperature
- constant pressure
- constant entropy
- constant enthaply
Releted Questions
Steam Boilers, Engines, Nozzles & Turbines Mcqs
MCQ: Which is not correct statement about effect of sulphur in fuel ___________________?
- it has heating value
- it helps in electrostatic precipitation of ash in flue-gases
- it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
- it erodes furnace walls
- none of the above
D
MCQ: Which is not the correct statement about moisture in coal ______________________?
- inherent moisture and surface mois¬ture are different things
- in some coals moisture may be present upto 40%
- some moisture in coal helps in better burning which is not possible with completely dry coal
- it increases thermal efficiency
- moisture in coal is removed before firing by heating it with hot air
D
MCQ: Which is not correct statement about the function of furnace____________________?
- to provide proper conditions for con-tinuous complete combustion
- mix fuel with air and ignite
- separate ash from coal
- maintain heat supply to prepare and ignite the incoming fuel
- to minimise radiation losses
C
MCQ: Which is not correct statement about pulverised fuel firing ?
- high burning rate is possible
- heat release can be easily controlled
- fuel burns economically
- it is the best technique for burning high ash content fuel having low fusion ash
- separate mills are required to powder the coal
D
MCQ: Pick up wrong statement about desired properties of a good fuel__________________?
- high calorific value
- produce minimum smoke and gases
- ease in storing
- high ignition point
- ecomomical
D