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 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
The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is
A Conduction
B Convection
C Both A & B
D Radiation
The size of a boiler drum in pulverized fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase
A Increases
B Decreases
C Remains unchanged
D Increases/decreases depending on steam temperature requirements
একটি কার্নো ইঞ্জিন 237°C এবং 139°C তাপমাত্রায় কার্যরত। উচ্চ তাপমাত্রায় এটি যদি 2.54 x 106 J তাপ শোষন করে, প্রতি সাইকেলে ইঞ্জিনটি কি পরিমান কাজ করছে ? (A Carnot engine operates between 237°C and 139°C. If it absorbs 2.54 x 106 J heat at high temperature, how much work is done by the engine per cycle?)
A  50.4 x 104 J  
B 450 kJ  
C 4.8 x 104 J  
D 488 kJ 
E  6.04 x 105 J
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?
A Airpreheater
B Economiser
C Steam superheater
D Furnace water wall
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
A Conduction
B Convection
C Both A & B
D Radiation
The high pressure boiler is one, which produces steam at a pressure more than
A Atmospheric pressure
B 5 kg/cm2
C 10 kg/cm2
D 7580 kg/cm2
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

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