A. Water passes through tubes and flue gases around it
B. Tube carrying hot flue gases are immersed in a pool of water
C. Tubes are placed in vertical position
D. None of these
Answer: Option A
Related Mcqs:
- Boiler tube size is specified by its thickness and _____________________ diameter ?
A. Outside
B. Inside
C. Mean
D. None of these - The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the ______________ of a boiler ?
A. Evaporative capacity
B. Evaporation efficiency
C. Thermal efficiency
D. Steam load - The delivery pressure of boiler feed water pump compared to the boiler steam pressure is___________________?
A. Same
B. Slightly less
C. Slightly more
D. Much more - Which of the following is a boiler accessory i.e., not a boiler mounting ?
A. Blow off cock
B. Feed check valve
C. Feed water pump
D. Stop valve - The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?
A. Water alkalinity & leakage
B. Hydrazine addition during feed water treatment
C. Release of non-condensable gas from water in the boiler
D. Scale formation - A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
A. 6
B. 18
C. 38
D. 52 - Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
A. Conduction
B. Convection
C. Radiation
D. Both A. & B. - A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?
A. 10
B. 30
C. 50
D. 80 - Baffles provided on the shell side of a shell and tube heat exchanger are meant for _____________________?
A. Providing support for the tubes
B. Improving heat transfer
C. Both A & B
D. Preventing the fouling of tubes & stagnation of shell side fluid - The most detrimental impurity in high pressure boiler feed water is ___________________?
A. Suspended salt
B. Dissolved salt
C. Silica
D. Turbidity
