Related Questions

Which of the following impurities in feed water for high pressure boiler is the most detrimental?
A Silica
B Dissolved oxygen
C Suspended salt
D Dissolved salt
Which of the following is the most detrimental for water used in high pressure boiler?
A Silica
B Turbidity
C Phenol
D Dissolved oxygen
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
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A Blow off cock
B Fusible plug
C Stop valve
D Safety valve
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in
A Greater degree of separation with a fixed number of trays
B Increased reboiler load
C Increased reflux ratio
D None of these
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as
A Regenerative heating
B Reheating of steam
C Bleeding
D None of these
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
A Feed pump
B Injector
C Feed check valve
D Pressure gauge
Deaeration of high pressure boiler feed water is done to reduce
A Foaming from boilers
B Its dissolved oxygen content
C Its silica content
D Caustic embrittlement
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
A Dissolved oxygen content
B Biological oxygen demand
C Vapor pressure
D All of the above
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as
A Internally fired boiler
B Externally fired boiler
C Natural circulation boiler
D Forced circulation boiler

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