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

11) The natural draught is produced by

12) Willian's line for the steam engine is a straight line relationship between the steam consumption per hour and

13) The temperature of condensate is __________ on leaving the condenser than that of circulating water at inlet.

14) A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.