Steam Boilers, Engines, Nozzles and Turbines

A. supply of excess, air
B. supply of excess coal
C. burning CO and unburnts in upper zone of furnace by supplying more air
D. fuel bed firing
E. none of the above

A. cavitation of .boiler feed pumps
B. corrosion caused by oxygen
C. heat transfer coefficient
D. pH value of water
E. weight of water to be handled

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

A. increases
B. decreases
C. remains constant
D. may increase or decrease depending upon the method of storage
E. none of the above

A. very low pressure
B. atmospheric pressures
C. medium pressures
D. very high pressures
E. none of the above

A. more heating surface
B. less heating surface
C. equal heating surface
D. heating surface depends on other parameters
E. none of the above

A. increases
B. decreases
C. remains unchanged
D. increases/decreases depending on steam temperature requirements
E. unpredictable

A. corrosion
B. scale
C. carryover
D. embrittlement
E. all of the above

A. regulate flow of boiler water
B. check level of water in boiler drum
C. recirculate unwanted feed water
D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
E. none of the above

A. convection
B. radiation
C. conduction
D. radiation and conducton
E. radiation and convection