201. The effect of wire drawing is to decrease the area of indicator diagram and thus work done by the engine is reduced. Agree Disagree ✅ The correct answer is option A.
202. The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure. equal to less than higher than ✅ The correct answer is option B.
203. The function of a flywheel is to convert reciprocating motion of the piston into rotary motion. to convert rotary motion of the crankshaft into to and fro motion of the valve rod to prevent fluctuation of speed to keep the engine speed uniform at all load conditions ✅ The correct answer is option C.
204. The fire tubes in a Cochran boiler are horizontal vertical inclined ✅ The correct answer is option A.
205. An economiser __________ the steam raising capacity of a boiler. increases decreases has no effect on ✅ The correct answer is option A.
206. The temperature of condensate is __________ on leaving the condenser than that of circulating water at inlet. higher lower ✅ The correct answer is option A.
207. 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 56% 63% 74% 78% ✅ The correct answer is option B.
208. The function of a safety valve is to blow off steam when the pressure of steam inside the boiler exceeds the working pressure to indicate the water level inside the boiler to an observer to measure pressure of steam inside the steam boiler none of the above ✅ The correct answer is option A.
210. The aim of a compound steam engine is to reduce the ratio of expansion in each cylinder to reduce the length of stroke to reduce the temperature range in each cylinder all of the above ✅ The correct answer is option D.