Related Questions

The most prominent single cause of corrosion in boilertubes, 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 _________ 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
Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?
A Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler
B Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler
C Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes
D Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube
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
Steam in water tube boiler as compared to fire tube boiler
A Can be raised rapidly
B Is raised at slower rate
C Is raised at same rate
D Could be raised at fast/slow rate depending on design
A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called
A Blow off cock
B Stop valve
C Superheater
D None of these
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
For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has
A More heating surface
B Less heating surface
C Equal heating surface
D Heating surface depends on other parameters
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as
A Blow off cock
B Fusible plug
C Superheater
D Stop valve
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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