Category: Steam Boilers, Engines, Nozzles and Turbines

A. has high heating value
B. retards electric precipitation
C. promotes complete combustion
D. has highly corrosive effect
E. facilitates ash removal

A. mean diameter and thickness
B. inside diameter and thickness
C. outside diameter and thickness
D. outside diameter and inside diameter
E. outside diameter alone

A. horizontal
B. vertical
C. inclined
D. both horizontal and vertical
E. horizontal and inclined

A. keep the burner tips cool
B. aid in proper combustion
C. cause sputtering, possibly extinguish¬ing flame
D. clean the nozzles
E. reduce flame length

A. equal to carnot cycle
B. less than carnot cycle
C. more than carnot cycle
D. could be anything
E. none of the above

A. correct fuel air ratio
B. proper ignition temperature
C. 02 to support combustion
D. all the three above
E. none of the above

A. temperature, time, and turbulance
B. total air, true fuel, and turbulance
C. thorough mixing, total air, and temperature
D. total air, time, and temperature
E. none of the above

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

A. more
B. less
C. same
D. could be more or less depending on other factors
E. none of the above

A. same
B. more
C. less
D. less or more depending on size of boiler
E. unpredictable