Steam Boilers and Engines

1.The object of producing draught in a boiler is

to provide an adequate supply of air for the fuel combustion to exhaust the gases of combustion from the combustion chamber to discharge the gases of combustion to the atmosphere through the chimney all of the above

2.In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to

water space also chimney steam space superheater

3.In water tube boilers

water passes through the tubes which are surrounded by flames and hot gases the flames and hot gases pass through the tubes which are surrounded by water forced circulation takes place none of these

4.Which of the following statement is wrong ?

Locomotive boiler is a water tube boiler. Water tube boilers are internally fired. La-mont boiler is a low pressure water tube boiler. all of the above

5.When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

slow speed engine medium speed steam engine high speed steam engine none of these