Power Plant Guruji

 1. Main objective of boiler trial is ? a) To determine the generating capacity of the boiler b) To determine the thermal efficiency of the boiler, when working at a definite pressure c) To prepare heat balance sheet for the boiler d) All of the above Ans. d 2. 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 ? a) Safety valve b) Fusible plug c) Blow off cock d) Stop valve Ans. b 3. The shell of the cochran boiler is made hemispherical ? a) To provide maximum strength and space b) To withstand high pressure inside c) Both ( a ) and ( b ) d) None of these Ans. c 4. The dryness fraction of steam within a turbine is not allowed to fall below ? a) 0.5 b) 0.9 c) 0.95 d) 0.99 Ans. b 5. With increase in pressure ? a) Enthalpy of dry saturated steam increase b)  Enthalpy of dry saturated steam remains same c)  Enthalpy of dry saturated steam decreases d)  Enthalpy of dry saturated steam first increas...