Power Plant Guruji

  Boiler Operation Engineer Previous year Questions With Answer Set - 41 1. Assuming same efficiency for the same draught and neglecting leakage, power required by induced draught fan is greater than power required by forced draught fan. a) True b) False Ans. a 2. Which of the following is FALSE about steam jet draught? a) Low grade fuel can also be used b) Requires low maintenance c) Steam jet draught is a type of artificial draught d) In case of forced steam jet draught, the jet is directed into smoke box Ans. d 3. Which of the following statements is FALSE regarding artificial draught? a) There is no need of water cooled bearing in forced draught fan b) Fan size and power required by a forced draught fan are 1/5 to ½ of that required for an induced draught fan c) Tendency for air leak into the boiler furnace is less in Induced draught fan as compared to forced draught fan d) In forced draught the fan/blower is installed near the base of the boiler Ans. c 4. Which of the following st

  Boiler Operation Engineer Previous year Questions With Answer Set - 40 1. What is the unit of equivalent evaporation? a) kg of steam/kg of fuel fired b) kg of steam/h/m2 of heating surface c) kg of steam/h d) kg of steam/kg of air supplied Ans. a 2. What is the latent heat of vaporization of water at 100°C and 1 atm pressure? a) 2546 kJ/kg b) 1254 kJ/kg c) 1564 kJ/kg d) 2257 kJ/kg Ans. d 3. Which of the following CANNOT be the unit of ‘evaporative capacity’? a) kg of steam/h b) kg of steam/h/m2 of heating surface c) kg of steam/kg of air supplied d) kg of steam/kg of fuel fired Ans. c 4. Which of the following is the correct formula for factor of evaporation? a) f = h−hf1/2257 b) f = hf1−h/2257 c) f = h−hf1/1257 d) f = hf1−h/1257 Ans. a 5. Which of the correct formula for calculating equivalent evaporation? a) me=ma(h−hf1)/2257 b) me=ma(h−hf1)/1257 c) me=ma(hf1−h)/2257 d) me=(h−hf1)/ 2257 Ans. a 6. Boiler efficiency doesn’t depend on _____ a) calorific value of fuel fired b) specific

  Boiler Operation Engineer Previous year Questions With Answer Set - 39 1. Which of the following statements about feed check valve is FALSE? a) It controls the flow of water b) It only allows flow of water in one direction c) It is fitted on top of the boiler shell d) It consists of check valve which automatically moves up and down under pressure of water Ans. c 2. The part of the feed check valve which moves up and down automatically under the pressure of water on its gun metal seat is called _____ a) Check valve b) Fusible plug c) Flange d) Safety valve Ans. a 3. What is the function of a feed check valve? a) It regulates the flow of hot gases from the fire-box b) It controls the flow of air to the combustion chamber c) It controls the supply of steam outside the boiler d) It controls the supply of water to boiler Ans. d 4. In a fusible plug, the substance that melts when it comes in contact with the steam is called _____ a) Melt b) Meting wax c) Fusible metal d) Fusible wax Ans. c

  Boiler Operation Engineer Previous year Questions With Answer Set - 36 1. What is the purpose of guard glass in a glass-tube water level indicator? a) It protects the attendant, if water starts leaking b) It protects the water gauge, if steam pressure increases the design pressure c) It protects the attendant, if boiler cracks d) It protects the attendant, if the gauge glass breaks Ans. d 2. What is the purpose of pressure gauge? a) It measures the pressure exerted on the boiler shell from outside b) It measure the current atmospheric pressure c) It measures pressure exerted inside the boiler shell d) It measures hydrostatic pressure of water at the bottom of the boiler shell Ans. c 3. Which of the following statements about compound pressure gauge is TRUE? a) It measure the hydrostatic pressure exerted by water at the bottom surface b) It can measure pressures above and below atmospheric pressure on the same dial c) It is installed at the bottom of the boiler shell d) It measures ab

  MCQ Questions On Boiler - Safety Valves Or Pressure Relief Valve  1 . The function of a safety valve is _____ a) to release the excess steam when the steam pressure exceeds the rated pressure b) to extinguish fire when the temperature reaches impermissible value c) to release the excess water d) it cuts off the water supply when water level reaches its maximum limit Ans.a 2. Which of the following is NOT a type of safety valve? a) Dead weight safety valve b) Lever safety valve c) Spring loaded safety valve d) High water and low steam safety valve Ans. d 3. A Steam separator is a boiler mounting. a) True b) False Ans. b 4. In water level indicator, the glass tube that indicated the water level is called _____ a) measurement tube b) guard glass tube c) gauge glass tube d) level tube Ans. c 5. Which of the following statements about high steam and low water safety valve is FALSE? a) It can be used on portable boilers b) Steam escapes out when water level falls below a certain level c) S

  NTPC Power Plant JE Previous Year Question Paper   1. Which of the following is TRUE about an injector? a) It feeds water into the boiler b) Kinetic Energy of steam is utilized to increase velocity of feed water c) It is used where there isn’t enough space to install feed pump d) It is ideal for high capacity high pressure boilers Ans. d 2. What is the function of economizer? a) It is used to heat the feed water b) It is used to improve the quality of steam c) It is used to heat air being supplied for combustion d) It separates suspended water particles from steam Ans. a 3. Pumping efficiency of an injector is high. a) True b) False Ans. b 4. Which of the following statements about vertical tube economiser (Green’s economiser) is FALSE? a) It is used with boilers operating below 25 bars b) It is an integral type economiser c) The direction of flow of flue gases is opposite to that of water d) It consists of a blow-off cock for removal of sediments Ans. b 5. What is the function of an