Related Questions

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 safety valve on boiler drum compared to safety valve on superheater is set at
A Same value
B Higher value
C Lower value
D Lower/higher depending on steam flow
For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
A More
B Less
C Equal
D Either A or B; depends on the viscosity of the fluid
Blow off cock in a boiler is used to
A Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
B Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
C Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
D Increase the temperature of saturated steam without raising its pressure
The high steam and low water safety valve is used to blow off steam when the
A Steam pressure exceeds the working pressure
B Water level in the boiler becomes too low
C Both (A) and (B)
D None of the above
Function of feed check valve in a boiler is to
A Facilitate circulation of high pressure feed water
B Check the water level in the boiler drum
C Prevent the back flow of water
D Regulate the water flow to boiler
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

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