276. The diameter of tubes for natural circulation boiler as compared to forced circulation boilers
is ...............
(A) More
(B) Less
(C) Same
(D) Could be more or less depending on other factors
277. Gusset stays in a boiler are provided to
(A) Prevent the bulging of flat surfaces
(B) Avoid explosion in furnace
(C) Prevent leakage of hot flue gases
(D) Support furnace freely from top
278. Pour point of fuel oil is the
(A) Lowest temperature at which oil will flow under set condition
(B) Storage temperature
(C) Temperature at which fuel pumps through burners
(D) Temperature at which oil is transported
279. In warming up a boiler, the temperature is increased
(A) uniformily and gradually
(B) First slowly and then rapidly
(C) First rapidly and then slowly
(D) At any rate
280. TDS of 50 TPH boiler water is required to be maintained at 22 ppm. TDS of make-up feed water is 2ppm. Calculate percentage of blowdown required to maintain this TDS level.
(A) 11%
(B) 10%
(C) 50%
(D) None of the mentioned
281. Which one of the following orders is the correct order of passing the flue gases through the different absorbents during anaysis in Orsat apparatus?
(A) Potassium hydroxide solution - Alkaline solution of pyrogallic acid - Cuprous chloride solution
(B) Potassium hydroxide solution - Cuprous chloride solution - Alkaline solution of pyrogallic acid
(C) Cuprous chloride solution - Alkaline solution of pyrogallic acid - Potassium hydroxide solution
(D) In any order
282. Dry flue gases with composition of CO2 = 10.4%, O2 = 9.6% and N2 = 80% indicates that
(A) Excess air is used
(B) Air is insufficient
(C) Hydrogen is not present in the coal
(D) Air is just sufficent
283. A boiler feed water pump delivers water at 425° K while operating at 3200 rpm. If this pump is switched off which thermo - hydraulic phenomenon will occur inside the pump ?
(A) Water hammer effect
(B) Thermo- siphon effect
(C) Cavitaion
(D) None of the mentioned
284. In a pulverised coal boiler how many percentage of ash is obtained as bottom ash
(A) 10 - 20%
(B) 40 - 50%
(C) 60 - 70%
(D) 80 - 90%
285. Water velocity, saturated steam velocity and superheated steam velocity through the pipes is in the descending order as under
(A) Water > saturated steam > super heated steam
(B) Water > super heated steam > saturated steam
(C) Saturated steam > water > super heated steam
(D) Saturated steam > super heated steam > water
286. Reheaters are used for
(A) Improving efficiency of boiler.
(B) Improving efficiency of turbine.
(C) Improving overall efficiency of the plant.
(D) For supplying dry steam to the turbine
287. As per amendment in Boilers Act, 2007 boiler is covered under the Boilers Act, if it will have following conditions
(A) Cap: > 25.0 litres; Design & working Pressure: 1.0 kg/cm2(gauge) and temperature : >100°C
(B) Cap: <25.0 Litres; Working Pressure : >2.5 kg/cm2(gauge) and Temperature : > 150°C
(C) Cap: > 25.0 litres; working Pressure: > 3.5 kg/cm2(gauge) and temperature : >273°C
(D) Cap: < 25.0 litres; working Pressure: > 3.5 kg/cm2(gauge) and temperature : >273°K
288. With increase in load, radiant super heater has
(A) Drooping characteristic
(B) Linear characteristic
(C) Rising characteristic
(D) Flat characteristic
289. How can incomplete combustion be best judged?
(A) By measuring CO in flue gases
(B) By measuring O2 in flue gases
(C) By measuring temperature of flue gases at exit of furnace.
(D) None of the above
290. In which of the following welding processes filler material is used?
(A) Spot welding
(B) Projection welding
(C) Seam welding
(D) None of the above
291. Cation exchange resin is denoted as
(A) R(OH)2
(B) RH2
(C) ROOH
(D) RCOH
292. As per Regulation 215, Efficiency of Ligament when a shell of drum is drilled for tubes in a line parallel to the axis of the shell of drum is determined by.
(A) Efficiency of ligament = (p – nd) / p
(B) Efficiency of ligament = d / a
(C) Efficiency of ligament = (PL – d) / PL
(D) Efficiency of ligament = (p – d) / p
293. On receipt of the registration application competent person may fix date within how many days for the inspection of the boiler?
(A) 30 Days
(B) 40 Days
(C) 50 Days
(D) 60 Days
294. When a certificate authorizing the use of a boiler shall not cease to be in force?
(A) On the expiry of the period for which it was granted
(B) When any accident occurs to the Boiler
(C) When the boiler is moved, the boiler not being a vertical boiler the heating surface of which is less than 20 mt2
(D) When any accident occurs nearby the industry where the boiler has been kept
295. If any accident occurs to the boiler within what time the owner or person in charge needs to report the same to the inspector?
(A) 24 Hours
(B) 36 Hours
(C) 48 Hours
(D) 72 Hours
296. What is the punishment for the illegal use of the boiler for the first time as per section 23 of the Boilers Act?
(A) Fine which may extend to Rs. 20,000
(B) Fine which may extend to Rs. 50,000
(C) Fine which may extent to Rs. 1,00,000
(D) Fine which may extent to Rs. 2,00,000
297. Who will be the chairman of the “Evaluation Committee” as per the Indian Boiler Regulations, 1950?
(A) Secretary Ministry of Industry
(B) Inspecting authority
(C) Technical Adviser (Boilers)
(D) Director of Boilers
298. Periodic check tests consist of a selection of the test prescribed under Regulation 95 and 97 shall be repeated at intervals of not more than ............... months to provide evidence that the electrodes currently produced continue to possess the properties recorded in the initial tests.
(A) Two months
(B) Three months
(C) Six months
(D) Twelve months
299. In DM plant after degsifire the pH of the water
(A) Decrease
(B) Increase
(C) Remain the same
(D) May increase or decrease
300. If the material expands freely due to heating, it will develop
(A) Thermal stress
(B) Tensile stress
(C) Bending
(D) Compressive stress.
is ...............
(A) More
(B) Less
(C) Same
(D) Could be more or less depending on other factors
277. Gusset stays in a boiler are provided to
(A) Prevent the bulging of flat surfaces
(B) Avoid explosion in furnace
(C) Prevent leakage of hot flue gases
(D) Support furnace freely from top
278. Pour point of fuel oil is the
(A) Lowest temperature at which oil will flow under set condition
(B) Storage temperature
(C) Temperature at which fuel pumps through burners
(D) Temperature at which oil is transported
279. In warming up a boiler, the temperature is increased
(A) uniformily and gradually
(B) First slowly and then rapidly
(C) First rapidly and then slowly
(D) At any rate
280. TDS of 50 TPH boiler water is required to be maintained at 22 ppm. TDS of make-up feed water is 2ppm. Calculate percentage of blowdown required to maintain this TDS level.
(A) 11%
(B) 10%
(C) 50%
(D) None of the mentioned
281. Which one of the following orders is the correct order of passing the flue gases through the different absorbents during anaysis in Orsat apparatus?
(A) Potassium hydroxide solution - Alkaline solution of pyrogallic acid - Cuprous chloride solution
(B) Potassium hydroxide solution - Cuprous chloride solution - Alkaline solution of pyrogallic acid
(C) Cuprous chloride solution - Alkaline solution of pyrogallic acid - Potassium hydroxide solution
(D) In any order
282. Dry flue gases with composition of CO2 = 10.4%, O2 = 9.6% and N2 = 80% indicates that
(A) Excess air is used
(B) Air is insufficient
(C) Hydrogen is not present in the coal
(D) Air is just sufficent
283. A boiler feed water pump delivers water at 425° K while operating at 3200 rpm. If this pump is switched off which thermo - hydraulic phenomenon will occur inside the pump ?
(A) Water hammer effect
(B) Thermo- siphon effect
(C) Cavitaion
(D) None of the mentioned
284. In a pulverised coal boiler how many percentage of ash is obtained as bottom ash
(A) 10 - 20%
(B) 40 - 50%
(C) 60 - 70%
(D) 80 - 90%
285. Water velocity, saturated steam velocity and superheated steam velocity through the pipes is in the descending order as under
(A) Water > saturated steam > super heated steam
(B) Water > super heated steam > saturated steam
(C) Saturated steam > water > super heated steam
(D) Saturated steam > super heated steam > water
286. Reheaters are used for
(A) Improving efficiency of boiler.
(B) Improving efficiency of turbine.
(C) Improving overall efficiency of the plant.
(D) For supplying dry steam to the turbine
287. As per amendment in Boilers Act, 2007 boiler is covered under the Boilers Act, if it will have following conditions
(A) Cap: > 25.0 litres; Design & working Pressure: 1.0 kg/cm2(gauge) and temperature : >100°C
(B) Cap: <25.0 Litres; Working Pressure : >2.5 kg/cm2(gauge) and Temperature : > 150°C
(C) Cap: > 25.0 litres; working Pressure: > 3.5 kg/cm2(gauge) and temperature : >273°C
(D) Cap: < 25.0 litres; working Pressure: > 3.5 kg/cm2(gauge) and temperature : >273°K
288. With increase in load, radiant super heater has
(A) Drooping characteristic
(B) Linear characteristic
(C) Rising characteristic
(D) Flat characteristic
289. How can incomplete combustion be best judged?
(A) By measuring CO in flue gases
(B) By measuring O2 in flue gases
(C) By measuring temperature of flue gases at exit of furnace.
(D) None of the above
290. In which of the following welding processes filler material is used?
(A) Spot welding
(B) Projection welding
(C) Seam welding
(D) None of the above
291. Cation exchange resin is denoted as
(A) R(OH)2
(B) RH2
(C) ROOH
(D) RCOH
292. As per Regulation 215, Efficiency of Ligament when a shell of drum is drilled for tubes in a line parallel to the axis of the shell of drum is determined by.
(A) Efficiency of ligament = (p – nd) / p
(B) Efficiency of ligament = d / a
(C) Efficiency of ligament = (PL – d) / PL
(D) Efficiency of ligament = (p – d) / p
293. On receipt of the registration application competent person may fix date within how many days for the inspection of the boiler?
(A) 30 Days
(B) 40 Days
(C) 50 Days
(D) 60 Days
294. When a certificate authorizing the use of a boiler shall not cease to be in force?
(A) On the expiry of the period for which it was granted
(B) When any accident occurs to the Boiler
(C) When the boiler is moved, the boiler not being a vertical boiler the heating surface of which is less than 20 mt2
(D) When any accident occurs nearby the industry where the boiler has been kept
295. If any accident occurs to the boiler within what time the owner or person in charge needs to report the same to the inspector?
(A) 24 Hours
(B) 36 Hours
(C) 48 Hours
(D) 72 Hours
296. What is the punishment for the illegal use of the boiler for the first time as per section 23 of the Boilers Act?
(A) Fine which may extend to Rs. 20,000
(B) Fine which may extend to Rs. 50,000
(C) Fine which may extent to Rs. 1,00,000
(D) Fine which may extent to Rs. 2,00,000
297. Who will be the chairman of the “Evaluation Committee” as per the Indian Boiler Regulations, 1950?
(A) Secretary Ministry of Industry
(B) Inspecting authority
(C) Technical Adviser (Boilers)
(D) Director of Boilers
298. Periodic check tests consist of a selection of the test prescribed under Regulation 95 and 97 shall be repeated at intervals of not more than ............... months to provide evidence that the electrodes currently produced continue to possess the properties recorded in the initial tests.
(A) Two months
(B) Three months
(C) Six months
(D) Twelve months
299. In DM plant after degsifire the pH of the water
(A) Decrease
(B) Increase
(C) Remain the same
(D) May increase or decrease
300. If the material expands freely due to heating, it will develop
(A) Thermal stress
(B) Tensile stress
(C) Bending
(D) Compressive stress.
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