Related Questions

Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler
A Increases
B Decreases
C Remain unaffected
D First increases and then decreases
When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as
A Internally fired boiler
B Externally fired boiler
C Natural circulation boiler
D Forced circulation boiler
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
A More
B Less
C Same
D Could be more or less depending on other factors
The relative heat absorption for successively added equal areas of boiler convection heating surfaces
A Increases
B Decreases
C Remain unaffected
D First increases and then decreases
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
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.
A More
B Less
C Equal
D None of these
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?
A Long vertical evaporator
B Horizontal tube evaporator
C Agitated film evaporator
D Calenderia vertical tube evaporator
while there is -- single newspaper with a large national circulation, many magazines have national circulation .
A not
B noe
C no
D not any one
The type of liquor circulation system to be ' employed in evaporators (viz. natural or forced circulation) is determined mainly by the __________ of the liquid.
A Viscosity
B Density
C Thermal conductivity
D Corrosive nature
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
A Is economical in operation
B Employs high velocity, high heat transfer rate and less heating surface requirement
C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
D Both B & C

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