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You Are On Multi Choice Question Bank SET 1478

73901. Combustuion of fuel takes place __________ the engine cylinder of a steam engine.



73902. The forced circulation of water does not take place in





73903. A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimny, is known as





73904. The factor of evaporation for all boilers is always




73905. The ratio of the actual vacuum to the ideal vacuum in a condenser is called





73906. An air preheater





73907. A condenser in a steam power plant





73908. The amount of water evaporated in kg per kg of fuel burnt is called





73909. In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is __________ the lowpressure cylinder.




73910. Babcock and Wilcox boiler is a stationary type of water tube boiler.



73911. A Cochran boiler is a horizontal multi-tubular boiler.



73912. In forced circulation steam boilers, the force is applied





73913. In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as





73914. A condenser maintains a low pressure (below atmospheric) so as to obtain the maximum possible energy from steam and thus to secure a high efficiency.



73915. The amount of water evaporated from and at 100° C into dry and saturated steam is called evaporative capacity of a boiler.



73916. The difference between the atmospheric pressure and the absolute pressure is known as vacuum in a condenser.



73917. In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is





73918. The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as





73919. The function of a piston in a steam engine is




73920. The high steam and low water safety valve is not used in





73921. In a Woolf type compound engine, the high pressure and low pressure cylinders





73922. The actual power generated in the engine cylinder is called





73923. Which of the following is correct ? (where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)





73924. The working pressure range for a La-Mont boiler is





73925. The draught in locomotive boilers is produced by a





73926. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is known as equivalent evaporation from and at 100° C.



73927. There is about 15 to 20% of coal saving when an economiser is used in a boiler.



73928. An economiser is generally placed between





73929. In fire tube boilers





73930. The efficiency of a boiler is defined as





73931. The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called





73932. A valve installed between the boiler and the feed pump is





73933. The principal function of a stop valve is to





73934. The length of Cornish boiler varies from





73935. The indicated thermal efficiency is defined as the





73936. In surface condensers, the condensate and the cooling water mixes up.



73937. A water level indicator is a device to indicate the exact water level in the boiler at any instant.



73938. A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as





73939. The value of diagram factor depends upon





73940. The function of an eccentric rod is





73941. A receiver type compound engine, requires a lighter flywheel.



73942. The function of a valve rod is





73943. A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called





73944. The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called





73945. In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of





73946. A device used to empty the boiler whenever required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler, is called blow off cock.



73947. Clearance ratio is the ratio of





73948. In a boiler, the heat is lost





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