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BOE (BOILER OPERATION ENGINEER ) SHORT TYPE QUESTION ANSWER-6 FOR EXAMINATION
BOILER MULTIPLE TYPE QUESTION AND ANSWER
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BOE (BOILER OPERATION ENGINEER ) SHORT TYPE QUESTION ANSWER-6 FOR EXAMINATION:-
in this article we discussed about BOE (BOILER OPERATION ENGINEER ) SHORT TYPE QUESTION ANSWER FOR EXAMINATION , these question answers are very helpful for who preparing for BOE EXAMINATION , also who preparing for the Energy manager or Energy auditor exam . all of these question are selected by the power plant professional peoples who worked in power plant a very long time of interval and have very deep knowledge of power plant. so let us discussed all short type of power plant question answer.
1. Size of boiler tube is specified by
a. Mean diameter and thickness
b. Inside diameter and thickness
c. Outside diameter and thickness
d. Outside diameter alone
2. The fusible plug in small boiler is located
a. In the drum
b. In the fire tubes
c. Above steam drum
d. Over the combustion chamber
3. Caustic gouging destroyed protective film by
a. Dissolving carbonate scale
b. Dissolving iron and magnetite to form sodium ferroate.
c. Dissolving silicate sacle
d. Dspositing metal hydroxides
4. Carry over from drum is dangerous for
a. Boiler
b. Turbine
c. LTSH
d. Steam line
5. Deaerator are provided in boiler
a. To remove hardness from feed water
b. To remove dissolved oxygen from feed water
c. To increase the feed water temperature
d. To increase ph of feed water
6. In boiler quality steel % of carbon steel is
a. 0.30%
b. 0.25%
c. 0.35%
d. 0.20%
7. The major axis of elliptical manhole on the shell should be provided
a. Longitudinally
b. Circumferentially
c. Axially
d. None of the above
8. Stainless steel is an alloy of
a. Copper, zinc and iron
b. Aluminum, zinc and iron
c. Chromium, nickel and iron
d. None of the above
9. In a superheater
a. Pressure rise, temperature drops
b. Pressure rises, temperature remains constant
c. Pressure remains constant and temperature rises
d. Both pressure and temperature remains constant
BOE (BOILER OPERATION ENGINEER ) SHORT TYPE QUESTION ANSWER-6 FOR EXAMINATION
10. Minimum diameter of boiler safety valve as per IBR is
a. 15.0 mm
b. 19.0 mm
c. 32.5 mm
d. 50.0 mm
11. Burning of low grade fuel can be improve by
a. Blending of better quality
b. Oil assisted ignition
c. Pulverizing
d. Any of the above
12. Which variety of coal has lowest calorific value
a. Steam coal
b. Bituminous coal
c. Lignite coal
d. Anthracite coal
13. As compared to steam at entry to the turbine, which of the following will be larger at exit ?
Ans. a. Pressure
b. Flow rate
c. Specific volume
d. Specific enthalpy
14. The maximum percentage allowed for accumulation of pressure in steam test at site is
a. 05 %
b. 10 %
c. 7.5 %
d. 15 %
15. The range of graduation on pressure gauge for working pressure up to and including 35 kg/sq. cm shall be
a. Zero to 1.25 times the working pressure
b. Zero 1.50 times the working pressure
c. Zero to 2.0 times the working pressure
d. Zero to 1.0 times the working pressure
16. An increase in the conductivity of the water inside the boiler indicates a rise in
a. Purity
b. Temperature
c. Contamination
d. None of the above
17. The efficiency of a typical FBC boiler is of the order of
a. 30 %
b. 80 %
c. 70 %
d. 60 %
18. Which is the common coal firing system used in india thermal power plant
a. Stoker firing
b. Pulverized coal firing
c. Pressurized bed
d. Fluidized bed
19. Proper sizing of steam pipeline helps in minimizing
a. Steam requirements
b. Pressure drop
c. Temperature drops
d. Boiler efficiency
20. Which fuel requires the lowest amount of excess air for combustion
a. Natural gas
b. Furnace oil
c. Bagasse
d. Pulverized coal
POWER PLANT QUESTION ANSWERS
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21. 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
22. Which of the following parameters remains constant during ideal throttling process
a. Pressure
b. Entropy
c. Enthalpy
d. Temperature
23. Hydra step is mounted on
a. Boiler drum
b. Economizer
c. Re- heater
d. Superheater
24. Fish mouth opening is a term used to describe
a. PA fan impeller cracks
b. Boiler tube failure
c. Mill gear cracks
d. None of the above
25. In a boiler the mmaximum pressure is seen in the
a. Drum
b. Main header
c. Superheater
d. Economizer
26. Boiler means any closed vessel exceeding capacity wich is used expressly for generating stem under pressure
a. 2.75 liters
b. 200 liters
c. 25 liters
d.22.75 liters
27. Steam pipe means any pipe through which steam passes if
a. Pressure exceed 2.00 kg/cm2 and I.D is 250 mm
b. Pressure exceed 2.50 kg/cm2 and I.D is 100 mm
c. Pressure exceed 0.75 kg/cm2 and I.D is 300 mm
d. Pressure exceed 5.00 kg/cm2 and I.D is 150 mm
28. In a steam turbine power plant, the lowest pressure occurs in
a. Turbine inlet
b. Boiler
c. Condenser
d. Superheater
29. Which of the following is not a high pressure boiler
a. Loeffler
b. Lancashire
c. Velox
d. Lamount
30. Which of the following is not a fire tube boiler
a. Cochrane
b. Lancashire
c. Locomotive
d. Babcock and Wilcox
STATE TRUE AND FALSE:-
1. Stiochiometric air required for combustion of bagasse is about 3.2 .(T)
2. Forced steam jet draught is produced by placing the steam jet in flue gas entrance of Economiser in oil fired boiler operation . (F)
3. Bomb calorimeter is used to determine calorific value of gaseous fuels.(F)
4. Blending of coal means mixing of excessive fines with large lumps of coal and high GCV coal with low GCV coal.(T)
5. Chemical deaeration of feed water with hydrazine as oxygen scevenger remove oxygen but decrease TDS level.(F)
6. The coefficient of thermal expansion of refractory material should be less.(T)
7. If steam and water can coexist at 1.033 kg/cm2 and 100 deg. C at this condition, steam is called saturated vapour and water is called saturated liquid.(T)
8. Fyrite apparatus is used for measuring smoke density of flue gases.(F)
9. Suspension burning as well as grtae burning take place in spreader Stoker boiler.(T)
10. Inverted bucket steam traps operates on the principal of difference in temperature between steam and condensate.(F)
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