A. to provide proper conditions for con-tinuous complete combustion
B. mix fuel with air and ignite
C. separate ash from coal
D. maintain heat supply to prepare and ignite the incoming fuel
E. to minimise radiation losses
Related Mcqs:
- Pick up the correct statement as regards Cornish boiler and Lancashire boiler _______________?
A. cornish is fire tube and lancashire is water tube
B. cornish is water tube and lancashire is fire tube
C. cornish has two fire tubes and lancashire has one
D. lancashire has two fire tubes and cornish has one
E. both have two fire tubes - Which is not correct statement about pulverised fuel firing ?
A. high burning rate is possible
B. heat release can be easily controlled
C. fuel burns economically
D. it is the best technique for burning high ash content fuel having low fusion ash
E. separate mills are required to powder the coal - Which is not the correct statement about moisture in coal ______________________?
A. inherent moisture and surface mois¬ture are different things
B. in some coals moisture may be present upto 40%
C. some moisture in coal helps in better burning which is not possible with completely dry coal
D. it increases thermal efficiency
E. moisture in coal is removed before firing by heating it with hot air - Which is not correct statement about effect of sulphur in fuel ___________________?
A. it has heating value
B. it helps in electrostatic precipitation of ash in flue-gases
C. it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
D. it erodes furnace walls
E. none of the above - Pick up the correct statement from the following?
A. critical path method is an improvement upon bar chart method
B. critical path method provides a realistic approach to the daily problems
C. critical path method avoids delays which are very common in bar chart
D. critical path method was invented by Morgan R. Walker of Dupot and James E. Kelley of Remington U.S.A in 1957
E. all of the above - Pick up the correct statement from the following?
A. the float may be positive, zero or negative
B. if the float is positive and the activity is delayed by a period equal to its total float, the completion of project in not delayed
C. if the float of an activity is negative, delay in its performance is bound to delay the completion of project
D. if the float of an activity is zero, the activity is critical and any delay in its performance will delay the whole project
E. all of the above - Pick up the correct statement about relationship between various floats______________________?
A. free float = total float
B. independent float = total float
C. independent float > free float
D. free float > total float
E. independent float < free float - Pick up the correct statement from the following?
A. programmer evaluation and review technique is event oriented
B. programmer evaluation and review technique is not event oriented
C. critical path method is event oriented
D. critical.path method is not activity oriented
E. none of the above - Which is correct statement about reaction time for autoignition of fuel and the fuel air ratio__________________?
A. lean mixture has high reaction time
B. rich mixture has high reaction time
C. chemically correct mixture has mini-mum reaction time
D. all of the above
E. non of the above - Select the correct statement?
A. Local atmospheric pressure depends upon elevation of locality only
B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
C. Local atmospheric pressure is always below standard atmospheric pressure
D. A barometer reads the difference be-tween local and standard atmospheric pressure
E. Gauge piessure is equal to atmospheric pressure plus instrument reading
