86901. The cylinder dimensions of a compound engine may be designed on the basis of
86902. The function of a piston rod is
86903. An air preheater is installed
86904. The length of shell of a Locomotive boiler is
86905. The effect of wire drawing is to decrease the area of indicator diagram and thus work done by the engine is reduced.
86906. In a uniflow engine
86907. The shell diameter of a Locomotive boiler is
86908. The fire tubes in a Scotch marine boiler are
86909. In a reciprocating steam engine, the heat energy in the steam is converted into mechanical work by the to and fro motion of the piston.
86910. The power of a boiler may be defined as
86911. When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as
86912. The function of a safety valve is
86913. The fire tubes in a Cochran boiler are
86914. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly
86915. The aim of a compound steam engine is
86916. The average operating pressure of Benson boiler is
86917. The diameter of Cornish boiler varies from
86918. A single acting steam engine produces __________ power than that of double acting steam engine.
86919. The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure.
86920. The function of a flywheel is
86921. The rate of steam produced in Benson boiler is
86922. In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.
86923. Cut-off governing of steam engines is a method of controlling the engine output by varying
86924. In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be
86925. A safety valve mainly used with locomotive and marine boilers is
86926. Which of the following boiler is best suited to meet the fluctuating demand of steam ?
86927. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called
86928. An economiser is used to increase the temperature of saturated steam without raising its pressure.
86929. Besides mean effective pressure, the data required to determine the indicated power of an engine include
86930. The function of a governor is to keep the engine speed uniform at all load conditions.
86931. The efficiency of the plant __________ with the mechanical draught.
86932. For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature.
86933. The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
86934. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
86935. In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.
86936. Steam engines are called external combustion engines.
86937. The diagram factor is the ratio of the
86938. By compounding the expansion of steam in two or more cylinders, the length of stroke
86939. A good steam boiler is one which produces maximum quantity of steam with the given fuel
86940. Cut-off ratio is the ratio of
86941. Which of the following is a water tube boiler ?
86942. The number of fire tubes in a Cochran boiler are
86943. The actual power supplied by the engine crankshaft is called
86944. The draught produced by a steam jet issuing from a nozzle placed in the chimney is called
86945. The chimney draught varies with
86946. The relative efficiency is defined as the
86947. Benson boiler is a __________ water tube steam boiler using forced circulation of water.
86948. Lancashire boiler has __________ internal flue tubes.
86949. Locomotive boiler is a __________ boiler.
86950. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a