136) The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

natural draught

induced draught

forced draught

balanced draught

Answer is:

induced draught

137 fire tubes and 44 superheated tubes

147 fire tubes and 34 superheated tubes

157 fire tubes and 24 superheated tubes

167 fire tubes and 14 superheated tubes

Answer is:

to give maximum space and strength

to withstand the pressure of steam inside the boiler

to give maximum space and strength and to withstand the pressure of steam inside the boiler

none of the above

Answer is:

blow off cock

fusible plug

stop valve

safety valve

Answer is:

Right

Wrong

Answer is: