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Steam Boilers QUESTIONS AND ANSWERS

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