Related Questions

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
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 _________ 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
The diameter of fire tube of Cornish boiler compared to its shell is
A One half
B One third
C One fourth
D One fifth
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
A Are easier to clean
B Are less prone to fouling
C Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
D None of these
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
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
A fire broke out in a garments factory. How many minutes would it take for a fire truck to got to the fire 10 miles away if it travels at a rate of 20 mph?
A 10/20
B 20/10
C 60 * (10/20)
D 60 * (20 /10)
Boiler tube size is specified by its thickness and __________ diameter.
A Outside
B Inside
C Mean
D None of these
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

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