Power Plant Guruji

Question 1.The capacity of induced draft fan compared to forced draft fan in a boiler is ………. A. Same B. More C. Less D. Depending upon size of boiler Ans. B Question 2.O2 content in atmospheric air on volume basis is ………… A. 21% B. 23% C. 30% D. 78% Ans. A Question 3.Scale is formed on heat transfer surface when……………….. A. Water is acidic B. Water is alkaline C. Water contains dissolved gases D. Water contains dissolved calcium and magnesium salts. Ans. D Question 4.Which one of the following fuel has the highest hydrogen content and lowest sulphur content …………… A. Coal B. Furnace oil C. Natural gas D. LSHS Ans. C Question 5.For boiler water treatment chemical dosing with small discharge at high pressure, pump preferred is ………… A. Centrifugal B. Axil flow C. Propeller D. Reciprocating Ans. D Question 6.High % of carbon monoxide presence in the flue gas of boiler is an indicator of …………… A. Complete combustion B. Good control of pollutants C. Low excess air D. High excess air Ans. C Qu...

Question 1. The height of chimney in a power plant is governed by A. The draft to be created norms B. Sulphur in fuel C. Control of pollution & government D. None  Ans. B Question 2. Cavitation occurs in Pump A. Suction pipe B. Discharge pipe C. NRV’s D. None of above Ans. D Question 3. Proximate analysis of coal gives the following result A. Carbon, hydrogen, nitrogen, sulphur B Fixed carbon, Ash , volatiles , moisture C. Lower Calorific Value D Higher Calorific Value Ans. B Question 4. A steam pipe is to be insulted by two insulting materials put over each other. For better result A. Both may be put in any order B. Better insulator of the two should be put first then cover by less insulating C. Lower insulator material should be first put and covered with higher insulating material D. Depends on the steam temperature and conductivity of pipe Ans. B Question 5. The use of primary air in a PF boiler is for A. Carrying pulverised coal to the burners B. Cooling the boiler walls C...

Question 1. In a typical 200MW boiler, Emergency blow down tapping is taken from A. Drum B. Down comers/ring header C. De-aerator D. Can be any of the above Ans. A Question 2. which of the following is softer coal for grinding? A. Coal with HGI of 55 B. Coal with HGI of 45 C. Coal with HGI of 68 D. Any of the above Ans. C Question 3.typical combustion efficiency of a CFBC boiler is A. 40-60% B. 77-88% C. 88-96% D. 97-98% Ans. C Question 4.Drum material in typical 200MW boiler is A. Alloy steel B. Carbon steel C. Stainless steel D. All of the above Ans. B Question 5.Chromatographic analyser is used to measure the A. Oxygen in flue gas B. Carbon dioxide in flue gas C. Amount of individual gases in flue gas D. Sulphur dioxide in flue gas Ans. C Question 6.Spectrophotometer is used to A. Measure surface characteristics B. Measure chemical composition of alloy C. Gas composition D. Analyze colour spectrum Ans. B Question 7.The Orsat apparatus is used for measuring A. Chemical analysis of fl...

Question 1. Name the fan more suitable for high pressure application A. Propeller type fan B. Tube axial fan C. Backward curved centrifugal fan D. None of the above Ans. C Question 2. ESP works on the principle of A. Corona effect B. Induction effect C. Skin effect D. None of the above Ans. A Question 3. A solution having 4 pH is more acidic than a solution of 7 pH A. 03 times B. 30 times C. 100 times D. 1000 times Ans. D Question 4. Demineralisation of water is the process to remove A Dissolved oxygen B. Dissolved salts C. Carbon dioxide D. Chlorine Ans. B Question 5. Which of the following parameter remains constant during ideal throttling process A. Pressure B. Entropy C. Enthalpy D. Temperature Ans. C Question 6. Which of the following substance will have same percentage in ultimate and proximate a A. Hydrogen B. Moisture C. Ash D. Volatile matter Ans. C Question 7.Atomising of LDO in burners is carried out through A. Steam B. Compressed air C. Self pressure D. All of the above Ans...

Question 1. Incomplete combustion can be best judged by A. Smoke at chimney exit B. Excess air in fuel gas C. Measuring carbon monoxide in fuel gas D. Measuring temperature of fuel gas at exit of furnace Ans. C Question 2. In water wall furnace the heat is transferred to water will by A. Convection B. Radiation C. Conduction D. Radiation & conduction Ans. D Question 3. For industrial process heating the best quality of steam is A. Dry saturated steam B. Super heated steam C. Wet steam D. High pressure steam Ans. A Question 4. The parameter used by ASME to defined fans, blowers and compressors A. Fan ratio B. Specific ratio C. Blade ratio D. Twist ratio Ans. B Question 5. In a glass tube type water level indicator for a boiler , one end of the tube is connected to the water space and the other end is connected to A. Water space also B. Chimney C. Steam space D. Superheater Ans. C Question 6. The maximum heat loss in a boiler occurs due to A. Moisture in fuel B. Dry flue gases C. Ste...

Question 1. Which is the common coal firing system used in Indian thermal power plant A. stoker firing B. pulverised coal firing C. pressurised bed D. fluidised bed Ans. B Question 2. Deaeration of boiler feed water is referred to us A. removal of scales by blow down B. removal of silica C. removal of dissolved gases D. phosphate treatment of feed water Ans. C Question 3. In industrial applications the type of trap used for main steam lines A. thermodynamic B. bimetallic C. float D. thermostatic Ans. A Question 4. Proper sizing of steam pipeline helps in minimising A. steam requirement B. pressure drop C. temperature drop D. boiler efficiency Ans. B Question 5. The Turndown ratio' for oil fired boiler burners is the ratio of A. air to fuel B. maximum fuel input to actual fuel inputs C. maximum air input over minimum air input D. maximum fuel input over minimum fuel input Ans. D Question 6. Which fuel requires the lowest amount of excess air for combustion A. natural gas B. Furnace ...

 Question 1. Cooling towers: 1. Remove the heat from the condensate 2. Should use water treatment 3. Prevent thermal pollution of rivers and lakes 4. Cannot be used during winter periods 5. Remove the sensible heat of the steam in the condenser  A. 2, 3  B. 1, 3, 4  C. 1, 3, 4, 5   D. 3, 4, 5   E.  2, 3, 4 Ans. A Question 2.Short term overheating usually exhibits:  A. Thin lip longitudinal rupture  B.  Thick lips longitudinal rupture  C.  Transverse cracks  D.   Severe pitting Ans. A  Question 3. High Temperature stress rupture and oxidation resistant can be increased by: A.  Alloying additives of Nickel and Tin B. Alloying additives of Phosphorus and Silicone C. Alloying additives of Molybdenum and Chromium D. Alloying additives of Aluminium and Boron Ans. C Question 4. Which of the following boilers has emerged as an alternative to conventional boilers because of its higher combustion efficiency? A. F...

 Qualifications: Post Graduates (MCA), Engineers (Civil), Engineers (CS/IT), Engineers (Electrical), Engineers (Electronics), Engineers (Electronics and Communication), Engineers (Mechanical), Engineers (Others) Experience Type : Experience Tenure Type : Contract Basis States : Delhi, Maharashtra National Thermal Power Corporation (NTPC) is inviting eligible candidates to apply for 9 contractual posts of Associate. Interested Eligible Candidates may send their applications as per prescribed format to concerned E-mail address by 23-12-2021. All the relevant documents must be sent alongwith application form, as proof of suitability for the posts. Email subject must be formed properly, containing name of post applied for. Vacancies & Eligibility Criteria : Post Vacancy Age Qualification Pay Associate 9 max 63 yrs BE/B. Tech in Computer Science/ IT or MCA and min 15 yrs experience as per norms * candidates are advised to check the official notice.   Dates to Consider: Applicat...

Q.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 Q.2 Which super heater in a boiler has a dropping characteristics? A.Pendent super heater  B.convection super hater C. Radiant super heater D.conduction super heater Ans. C Q.3 Size of boiler tubes is specific by- A.Mean diameter and thickness B.Inside diameter and thickness C. Outside diameter & thickness D.Outside diameter alone  Ans. C You May Also Read :  Expansion and Contraction in Boilers Q.4 Reheating of steam under ideal condition takes place at constant A.Entropy B.Enthalpy C .Pressure D.Temparature Ans. C Q.5 The fusible plug in small boilers is located- A. In the drum B. In the fire tubes C. Above steam dome D. Over the combustion chamber Ans. D Q.6 Reheat cycle in steam power plant is use...