Steam Boilers and Engines Questions

• The water tubes in a Babcock and Wilcox boiler are
• In a compound steam engine, the temperature range per cylinder is reduced, with corresponding reduction in the condensation.
• When the expansion of steam is carried out in a single cylinder and then exhausted into the atmosphere or a condenser, the engine is said to be a simple steam engine.
• The function of a superheater is to heat the feed water by utilising the heat in the exhaust flue gases before leaving through the chimney.
• The high steam and low water safety valve is used to blow off steam when the
• Willian's law holds good for throttle-governed engine, but not for cut-off governed engine.
• 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
• The motion of a D-slide valve in a steam engine is simple harmonic.
• Expansion ratio is the ratio of
• Lancashire boiler is used where working pressure and power required are
• A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as