Steam Boilers and Engines Online Test – Multiple Choice Questions and Answers 1. Lancashire boiler is stationary fire tube boiler internally fired boiler horizontal boiler all of these 2. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a condensing steam engine non-condensing steam engine slow speed engine vertical steam engine 3. Locomotive boiler is a single tube, vertical, externally fired and stationary boiler multitubular, horizontal, internally fired and mobile boiler single tube, horizontal, internally fired and stationary boiler multitubular, horizontal, externally fired and stationary boiler 4. The theoretical indicator diagram of a simple steam engine is based upon the assumption that the expansion (or compression) of the steam is hyperbolic steam is admitted at boiler pressure and exhausted at condenser pressure there is no pressure drop due to condensation all of the above 5. The chimney draught varies with height of chimney climatic conditions temperature of furnace gases all of these 6. The diagram factor is the ratio of the actual workdone per stroke to the theoretical workdone per stroke actual mean effective pressure to the theoretical mean effective pressure area of the actual indicator diagram to the area of theoretical indicator diagram any one of the above 7. The equivalent evaporation is defined as the evaporation of 15.653 kg of water per hour from and at 100° C the ratio of heat actually used in producing the steam to the heat liberated in the furnace the amount of water evaporated or steam produced in kg per kg of fuel burnt the amount of water evaporated from and at 100° C into dry and saturated steam 8. An economiser is installed in a boiler primarily to reduce fuel consumption increase steam pressure superheat the steam all of these 9. The heat balance sheet for the boiler shows the moisture present in the fuel steam formed by combustion of hygrogen per kg of fuel complete account of heat supplied by 1 kg of dry fuel and the heat consumed all of the above 10. The actual power supplied by the engine crankshaft is called brake power indicated power frictional power none of these Loading … Question 1 of 10
