Category: Steam Boilers, Engines, Nozzles and Turbines

A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. first decreases and then increases

A. horizontal straight line
B. vertical straight line
C. straight inclined line
D. curved line
E. none of the above

A. lowest temperature at which oil will flow under set condition
B. storage temperature
C. temperature at which fuel is pumped through burners
D. temperature at which oil is transported
E. none of the above

A. producer gas
B. coal gas
C. water gas
D. blast furnace gas
E. coke oven gas

A. same value
B. higher value
C. lower value
D. lower/higher depending on steam flow
E. unpredicatble

A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B. water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
C. feed pump is employed to supplement natural circulation in water wall type furnace
D. water is converted into steam in one pass without any recirculation
E. water is heated in a large number of tubes

A. causing clinkering and slagging
B. corroding air heaters
C. spontaneous combustion during coal storage
D. facilitating ash precipitation
E. all of the above

A. 78-81%
B. 81-85%
C. 85-90%
D. 90-95%
E. 95-100%.

A. avoid excessive build up of pressure
B. avoid explosion
C. extinguish fire if water level in the boiler falls below alarming limit
D. control steam dome
E. remove molten aslj

A. serve as storage of steam
B. serve as storage of feed water for water wall
C. remove salts from water
D. separate steam from water
E. control level