Power Plant Guruji

Boiler Operation Engineer Previous year Questions With Answer Set - 35 1. How many fire tubes (Furnace tubes) does a Lancashire boiler has? a) One b) Two c) Three d) Four Ans. b 2. Stirling boiler is _____ a) a fire tube boiler b) a bent-tube (water tube) boiler c) a horizontal straight tube (water tube) boiler d) a high pressure boiler Ans. b 3. In Lancashire boiler, an arrangement is made so that burning coal and ashes do not enter the furnace tubes. What is that arrangement called? a) Low brickwork fire bridge b) Ash-filter c) Filtering mesh d) Furnace separator Ans. a 4. Which of the following statements about Velox boiler is FALSE? a) It starts quickly b) It is compact c) Combustion rates are low d) Pressurized air is used Ans. c 5. Which of the following statements about super-critical is TRUE? a) It only needs preheater and superheater b) It only needs economizer and preheater c) It only needs economizer and superheater d) It only needs preheater Ans. a 6. Which of the following...

 1. In locomotive boiler, why natural draught cannot be obtained? a) The chimney height required is too low b) The boiler keeps moving, cannot maintain a constant pressure difference c) The chimney height required is too high d) The diameter of chimney required is impractical Ans. c 2. What is the working pressure of a Locomotive boiler? a) 12 bar b) 14 bar c) 16 bar d) 18 bar Ans. b 3. What is the steam capacity of a Locomotive boiler? a) 3000 kg/hr b) 5000 kg/hr c) 7000 kg/hr d) 9000 kg/hr Ans. d 4. The efficiency of Locomotive boiler is around _____ a) 30% b) 50% c) 70% d) 90% Ans. c 5. What is the function of dampers in Lancashire boiler? a) They control the flow of hot gases to the chimney b) They regulate the fire in the furnace c) They control the flow water to the boiler d) They control the steam going out of the boiler Ans. a 6. Which of the following statements is FALSE about a Locomotive boiler? a) It has high steam capacity b) It is portable c) Scale formation and corro...

  Boiler Operation Engineer Previous year Questions With Answer Set - 34 1. Which of the following boiler mounting is NOT present in a Cochran boiler? a) Stem stop valve b) Blow off cock c) Safety valve d) Fusible plug Ans. d 2. What is range of efficiency of a Cochran boiler? a) 50 – 55% b) 60 – 65% c) 70 – 75% d) 80 – 85% Ans. c 3. What is the shell diameter of a Cochran boiler? a) 2.00 m b) 1.50 m c) 1.00 m d) 2.75 m Ans. d 4. In a Simple Vertical boiler, two cross tubes are provided with the fire box. Which of the following statement about the orientation of these tubes is correct? a) Both of them are vertical b) Both of them are horizontal c) Both of them are inclined d) One is horizontal and the other one is vertical Ans. c 5. What is the height of a Cochran boiler? a) 5.79 m b) 4.10 m c) 4.26 m d) 3.50 m Ans. a 5. What is the steam capacity of a Cornish boiler? a) 5500 kg/hr b) 6500 kg/hr c) 7500 kg/hr d) 8500 kg/hr Ans. b 6. How many flue tubes does a Cornish boiler has? a)...

  Boiler Inspector Exam Previous Year Multiple Choice Questions With Answer  1. Which of the following is NOT a feature of a good boiler? a) Light in weight b) Steam production rate should be as per requirement c) Capable of quick starting d) Water and gas circuits should be such as to allow maximum fluid velocity Ans. d 2. Which of the following according to boiler terminology, is the term used for the deposition of medium to extreme hardness occurring on water heating surfaces because of undesirable condition in the boiler water? a) Refractory b) Foaming c) Scale d) Lagging Ans. c 3. According to boiler terminology, the removal of the mud and other impurities of water from the lowest part of the boiler is termed as _____ a) lagging b) blowing off c) waste removal d) foaming Ans. b 4. Furnace is also called fire-box. a) True b) False Ans. a 5. Which of the following is a refractory material? a) Fire brick b) Plastic c) Wood d) Paper Ans. a 6. In Simple Vertical boiler, the as...

  Boiler Operation Engineer Previous year Questions With Answer Set - 32 1. _____ is the platform in the furnace upon which fuel is burnt. a) Shell b) Grate c) Setting d) Heat exchanger Ans. b 2. What is the chamber formed by the space above the grate and below boiler shell called, where combustion takes place? a) Grate surface b) Mounting c) Furnace d) Setting Ans. c 3. In boiler terminology, the volume of the shell occupied by water is termed as _____ a) water space b) steam space c) wet volume d) wet space Ans. a 4. The items that are added to a boiler for safe operation are called _____ a) safety components b) setting c) accessories d) mountings Ans. d 5. What is the usual geometry of a boiler shell? a) Torus b) Cuboidal c) Cubical d) Cylindrical Ans. d 6. The function of “Setting” (Boiler term) is to confine heat to the boiler and form a passage for gases. a) True b) False Ans. a 7. The items that are added to increase the efficiency of boiler are called _____ a) mountings b) ...

  Boiler Operation Engineer ( BOE ) Objective Question And Answer Set - 31  1. What purpose do baffle plates serve in a Babcock and Wilcox boiler? a) They direct the flow of water b) They direct the flow of steam c) They direct the flow of hot gases d) They direct the flow of air to combustion chamber Ans. c 2. Babcock and Wilcox boiler is a forced circulation boiler?  a) True b) False Ans. b 3. What is the maximum working pressure of a Lancashire boiler? a) 10 bar b) 12 bar c) 14 bar d) 16 bar Ans. d 4. Which of the following statements is TRUE about Lancashire boiler? a) The length of its shell is about 10 m b) It has a steam capacity of 12000 kg/hr c) It is a water tube boiler d) Its efficiency is about 50 to 70% Ans. d 5. Which of the following is the correct range of the diameter of shell for a Lancashire boiler? a) 1 to 2 m b) 2 to 3 m c) 3 to 4 m d) 4 to 5 m Ans. b 6. Water tube boilers are further classified into horizontal straight tube and bent tube boilers. a) ...

 Boiler Operator Question And Answer Previous Year Set - 30 1. Which of the following is NOT a fire tube boiler? a) Cochran Boiler b) Lancashire Boiler c) Locomotive Boiler d) Babcock and Wilcox Boiler Ans. d 2. Which of the following is NOT a valid classification of boilers? a) Forced circulation and natural circulation b) High pressure and low pressure c) Stationary and Portable d) Single fired and Double fired Ans. d 3. Stationary boilers are used for _____ a) locomotive applications b) temporary applications c) power plant steam generation d) marine application Ans. c 4. In natural circulation boilers, water circulation takes place due to natural convection current produced by the application of heat. a) True b) False Ans. a 5. Which of the following is a single tube boiler? a) Cornish boiler b) Lancashire boiler c) Benson boiler d) Cochran boiler Ans. a 6. Which of the following is NOT true about Babcock and Wilcox boiler? a) Water tube boiler b) Externally fired c) High press...

  Boiler Operation Engineer Previous year Questions With Answer Set - 29 1.Main objective of a 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  b.To withstand high pressure inside space 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. 0.95 c. 0. 99 d. 0.9 Ans. d 5. With increase in pressure  a. Enthalpy of dry saturated steam increases b. Enthalpy of dry saturated steam decrease  c. Ent...

  Boiler Operation Engineer Previous year Questions With Answer Set - 28 1. What is the critical pressure of steam in a utility steam generator? a) 220.2 bar b) 221.2 bar c) 222.2 bar d) 225.2 bar Ans. b 2. The boiler in which the tubes are surrounded by hot gases is called ___________ a) fire tube boiler b) water tube boiler c) both fire and water tube boiler d) none of the mentioned Ans. b 3. Which of these is not a type of steam generator depending upon the kind of applications? a) utility steam generators b) marine steam generators c) agricultural steam generators d) industrial steam generators Ans. c 5. Which of the following are drumless once-through steam generators? a) Subcritical steam generator b) Supercritical steam generators c) Utility steam generators d) Marine steam generators Ans. b 6. The supercritical steam generators operate at a pressure range of ___________ a) 200-240 bar b) 200-220 bar c) 220- 240 bar d) >240 bar Ans. d 7. Marine steam generators are ______...

  Boiler Operation Engineer Objectives Questions And Answers Set - 27 1. Comparing fire tube and water tube boilers, which boiler can produce comparatively higher pressure steam than another for the same capacity? a) fire tube boiler b) water tube boiler c) both can produce steam at same pressure for the same capacity d) none of the mentioned Ans. b 2. What is the purpose of using economizer in the boiler? a) to heat feed water by utilizing heat from exhaust gases b) to heat feed water by utilizing some heat from superheated steam c) to superheat steam d) none of the mentioned Ans. a 3. How is the natural draught produced for exhaust gases? a) by using fan b) by using chimney c) by using gravity d) none of the mentioned Ans. b 4. What is the purpose of super heater in a boiler? a) to increase the temperature of saturated steam with increase in its pressure b) to increase the temperature of saturated steam without increase in its pressure c) to increase the temperature of feedwater ...