Willian's law holds good for throttle-governed engine, but not for cut-off governed engine.

More Questions from Steam Boilers and Engines

• Willian's line follows the law (where b = A constant representing the shape of the Willian's line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)
• The water tube boilers produce steam at a __________ pressure than that of fire tube boilers.
• For the same diameter and thickness of tube, a water tube boiler has __________ heating surface as compared to fire tube boiler.
• The missing quantity is mainly due to cylinder condensation and a small amount of steam leakage past the valves and piston.
• A single ended Scotch marine steam boiler may have one to four furnaces which enter from front end of the boiler.
• The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.
• The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks
• In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the atmospheric pressure.
• The mechanical draught produces more draught than natural draught.
• The maximum steam pressure in a Locomotive boiler is limited to

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