- (A) causing clinkering and slagging
- (B) corroding air heaters
- (C) spontaneous combustion during coal storage
- (D) facilitating ash precipitation
- (E) all of the above
Mechanical Engineering Mcqs
- (A) heated sufficiently
- (B) burnt in excess air
- (C) heated to its ignition point
- (D) burnt as powder
- (E) burnt as lumps
- (A) lancashire boiler
- (B) locomotive boiler
- (C) babcock and wilcox boiler
- (D) cochran boiler
- (E) benson boiler
- (A) drooping characteristic
- (B) linear characterisstic
- (C) rising characteristic
- (D) flat characteristic
- (A) from a metal wall from one medium to another
- (B) from heating an itermediate material and then heating the air from this material
- (C) by direct mixing ,
- (D) heat is transferred by bleeding some gases from furnace
- (E) none of the above
- (A) 100°C
- (B) above dew-point temperature of flue gases
- (C) below dew-point temperature of flue gases
- (D) less than wet bulb temperature of flue gases
- (E) above wet bulb temperature of flue gases
- (A) approach temperature should be as low as possible
- (B) handling and maintenance should be easier
- (C) heat transfer area should be optimum
- (D) stack gases should not be cooled to the dew point
- (E) none of the above
- (A) create vacuum
- (B) inject chemical solution in feed pump
- (C) pump water, similar to boiler feed pump
- (D) add make up water in the system
- (E) none of the above
- (A) the draft to be created
- (B) limitation of construction facilities
- (C) control of pollution
- (D) quantity of flue gases to be handled
- (E) all of the above
- (A) more
- (B) equal
- (C) less
- (D) could be more or less depending on the size of plant
- (E) none of the above
