Mechanical Engineering Questions And Answers :: Steam Boilers: part5



Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part5 : 1 to 5

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

1.Boiler H.P. is defined as the

steam evaporation rate per kg of fuel fired
work done in evaporating 1 kg of steam per hour from and at 100�C into dry saturated steam
the evaporation of 15.65 kg of water per hour from and at 100�C into dry saturated steam
work done by 1 kg of steam at saturation condition
heat consumed in evaporating 1 kg water at 0�C to steam at 100�C and 1.033 kg/cm pressure.

2.Size of boiler tubes is specified by

mean diameter and thickness
inside diameter and thickness
outside diameter and thickness
outside diameter and inside diameter
outside diameter alone.

3.The heat loss in a boiler takes place in the form of

heat carried away by flue gases
heat carried away by ash
moisture present in fuel and steam formed by combustion of hydrogen in fuel
radiation
all of the above.

4.In forced recirculation type boiler,

heating takes place at bottom and the water supplied at bottom gets con-verted into the mixture of steam bubbles and hot water which rise to drum
water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
feed pump is employed to supplement natural circulation in water wall type furnace
water is converted into steam in one pass without any recirculation
heating of water takes place in stages.

5.With increase in load, radiant superheater has

drooping characteristic
lihear characterisstic
rising characteristic
flat characteristic
none of the above.

More Steam Boilers QUESTIONS AND ANSWERS available in next pages

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