UP BOE 2014 OLD QUESTION WITH SOLUTION

#1. The object of producing draught in a boiler is (UP_2014_P_2)

To provide the adequate supply of air for the fuel combustion

To exhaust the gases of combustion from the combustion chamber c.

To discharge the gases of combustion to the atmosphere through the chimney

All of the above

#2. In water tube boiler (UP_2014_P_2)

Water passes through the tubes which are surrounded by flames and hot gases

The flames and hot gases pass though the tubes which are surrounded by water

Forced circulation takes place

None of the above

#3. In a glass tube type water indicator for a boiler, one end of the tube is connected to the water space and the other end is connected to……….. (UP_2014_P_2)

Water space also

Chimney

Steam space

Superheater

#4. Which of the following statement is wrong?

Locomotive boiler is a water tube boiler.

Water tube boilers are internally fired.

La-mont boiler is a low pressure water tube boiler

All the above

#5. The natural draught is produced by(UP_2014_P_2)

Steam jet

Centrifugal fan

Chimney

Both (a) & (b)

#6. A safety valve usually employed with stationary boilers is (UP_2014_P_2)

Lever safety valve

Dead weight safety valve

High steam and low water safety valve

All of these

Stationary boilers typically use a combination of lever safety valves, dead weight safety valves, and high steam and low water safety valves. This is because each type of valve has its own strengths and weaknesses, and using a combination of valves can help to ensure that the boiler is protected from overpressure.

#7. The chimney draught varies with (UP_2014_P_2)

Climatic conditions

Temperature of furnace gases

Height of chimney

All of the above

#8. The performance of boiler is measured by the (UP_2014_P_2)

Amount of water evaporated per hour

Steam produced in kg/h

Steam produced in kg/kg of fuel burnt

All of the above

#9. The maximum heat loss in a boiler occurs due to (UP_2014_P_2)

Moisture in fuel

Dry flue gases

Steam formation

Unburnt carbon

#10. Which of the following is not a boiler mounting? (UP_2014_P_2)

Blow off cock

Feed check valve

Economiser

Fusible plug

#11. Which of the following are the boiler accessories? (UP_2014_P_2)

Economiser

Superheater

Both (a) & (b)

None of these

#12. The ability of a material to resist softening at high temperature is known as …. (UP_2014_P_2)

Creep

Hot tempering

Hot hardness

Fatigue

#13. Killed steels are those steels (UP_2014_P_2)

Which are destroyed by burning

Which after their destruction are recycled to produce fresh steel

Which are de-oxidised in the ladle with silicon and aluminium

In which carbon is completely burnt

#14. Corrosion resistance of steel is increased by the addition of (UP_2014_P_2)

Chromium and nickel

Sulphur, phosphorus and lead

Vanadium and aluminium

Chromium, molybdenum, vanadium and tungsten

#15. Manganese in steel increases its (UP_2014_P_2)

Tensile strength

Ductility

Hardness

Malleability

#16. Brinell hardness tester uses a steel ball of size (UP_2014_P_2)

5 mm

10 mm

15 mm

Both a & b

#17. In arc welding, eyes need to be protected against (UP_2014_P_2)

Intense glare

Sparks

Infra-red rays

Infra-red and ultraviolet rays

#18. The gases used in tungsten inert gas welding are (UP_2014_P_2)

Hydrogen and oxygen

Hydrogen and CO2

Argon and neon

Argon and helium

#19. In resistance welding, voltage used for heating is (UP_2014_P_2)

10 V

100 V

440 V

#20. Seam welding is (UP_2014_P_2)

Multi-spot welding process

Continuous spot welding process

Used to form mesh

Used for welding cylindrical objects

#21. Generally water pipe lines are designed with water velocity (UP_2014_P_2)

<1 m/s

up to 2.0 m/s

> 2 m/s

None of the above

#22. In indirect steam heating, the heat utilized for heating application (UP_2014_P_2)

Sensible heat

Latent heat

Specific heat

None of the above

#23. Orsat meter is used for (UP_2014_P_2)

Gravimetric analysis of flue gas

Volumetric analysis of flue gas

Mass flow of the flue gas

Measuring smoke density of flue gas

#24. Sulphur content of fuel is very important to the plant operator because it (UP_2014_P_2)

Has high heating value

Retards electric precipitation

Ppromote complete combustion

Has highly corrosive effect

#25. Name the fan more suitable for high pressure application (UP_2014_P_2)

Propeller type fan

Tube axial fan

Backrd curved centrifugal fan

None of the above

#26. Turndown Ratio of a burners is the ratio of (UP_2014_P_2)

Air to fuel

Maximum fuel input to actual fuel input

Maximum fuel input to minimum fuel input

Maximum air input to minimum air input

#27. ESP works on the principle of (UP_2014_P_2)

Corona Effect

Induction Effect

Skin Effect

None of the above

#28. A solution having 4 pH is more acidic than a solution of 7 pH (UP_2014_P_2)

03 times

30 times

100 times

1000 times

#29. Demineralisation of water is the process to remove (UP_2014_P_2)

Dissolved oxygen

Dissolved salts

Carbon dioxide

Chlorine

#30. A rise in conductivity in boiler feed water indicate (UP_2014_P_2)

Drop in contamination of feed water

Greater purity of feed water

Rise in contamination of feed water

Has no relation with contamination of feed water

#31. Hooke’s law holds good up to ……(UP_2014_P_1)

Yield point

Limit of proportionality

Breaking point

Elastic limit

#32. If equal and opposite forces applied to a body tend to elongate it, the stress so produced is called (UP_2014_P_1)

Internal stress

Transverse stress

Tensile stress

Compressive stress

#33. Modulus of Rigidity is defined as the ratio of ……(UP_2014_P_1)

Longitudinal stress and longitudinal strain

Volumetric stress and volumetric strain.

Lateral stress and lateral strain

Shear stress and shear strain

#34. The pressure at which the latent heat of vaporisation is zero is ……..(UP_2014_P_1)

225.65 kg/cm2

273 kg/cm2

100 kg / cm2

1 kg/cm2

#35. A thin shell of diameter d, thickness t and length is subjected to an internal pressure p. The circumferential stress in the shell is …..(UP_2014_P_1)

pd / 2t

pd/4t

pd / 6t

pd / 8t

#36. Super heating of steam is done at………(UP_2014_P_1)

Constant volume

Constant temperature

Constant pressure

Constant enthalpy

When steam is superheated, its enthalpy remains constant, but its temperature and volume increase. This is because the heat added to the steam is used to increase its internal energy, not to do work.

Superheating of steam is done for a variety of reasons, including to:

Increase the efficiency of steam turbines
Reduce the risk of condensation in steam pipes
Improve the heat transfer capabilities of steam

Therefore, the answer is (d) Constant enthalpy.

#37. If the partial pressure of air and steam in a condenser be pa and pb respectively, then according to Dalton’s law, the pressure in condenser is equal to ………….(UP_2014_P_1)

Pa – Pb

Pa + Pb

(pa + po)/2

UNDER ROOT (pa x pb)

#38. Water at pressure 4 kg/cm2 and 160 °C temperature, when exposed to atmosphere will………….(UP_2014_P_1)

Start boiling

Flash and get converted in to steam

Remain as it was

Cool down

#39. Efficiency of a thermal cycle increases by

Regeneration

reheating of steam

both a & b

none of the above

#40. For burning of 1 kg of carbon to CO as per chemically correct combustion, the amount of air required (UP_2014_P_1)

1 kg

4/3 kg

8/3 kg

2 kg

#41. Ultimate analysis of fuel determine the percentage of (UP_2014_P_1)

Carbon, Hydrogen, Nitrogen, Sulphur, Moisture

Fixed Carbon, Ash, Volatile Matter, Moisture

Higher Calorific Value

Lower Calorific Value

#42. Incomplete combustion can be best judged by (UP_2014_P_1)

smoke at chimney exit

excess air in flue gas

measuring carbon monoxide in flue gas

measuring temperature of flue gas at exit of furnace

#43. In water wall furnace the heat is transferred to water wall by (UP_2014_P_1)

Convection

Radiation

Conduction

Radiation & conduction

#44. LMTD (log mean temperature difference) in case of counter flow compared to parallel flow heat exchanger is

Higher

Lower

Same

None of the above

#45. For industrial process heating the best quality of steam is (UP_2014_P_1)

Dry saturated steam

Super-heated steam

Wet steam

High pressure steam

#46. Proper sizing of steam pipe lines helps in minimizing (UP_2014_P_1)

Steam requirement

Temperature drop

Boiler efficiency

Pressure drop

#47. The parameter used by ASME to define fans, blowers and compressors (UP_2014_P_1)

Fan ratio

Specific ratio

Blade ratio

Twist factor

#48. The type of control gives maximum benefit for fan application for energy saving point of view is (UP_2014_P_1)

Discharge damper control

Inlet guide vane control

Speed control

Variable pitch control

#49. What is the impact on flow and discharge pressure when the impeller of a pump is trimmed (UP_2014_P_1)

Flow decreases with increased pressure

Both flow and pressure increases

Both flow and pressure decreases

Flow increases with decreased pressure

#50. if the speed of a centrifugal pump is doubled, it power consumption will become (UP_2014_P_1)

Two times

Four times

Eight times

No change

Finish

Results

POWER PLANT GYANNovember 8, 2023 Uncategorized No Comments »

Steam Trap :Newer

Older: Why is the safety valve of a superheater set at a lower pressure than a safety valve of a boiler drum? (Central BOE-2021)

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UP BOE 2014 OLD QUESTION WITH SOLUTION

#1. The object of producing draught in a boiler is (UP_2014_P_2)

#2. In water tube boiler (UP_2014_P_2)

#3. In a glass tube type water indicator for a boiler, one end of the tube is connected to the water space and the other end is connected to……….. (UP_2014_P_2)

#4. Which of the following statement is wrong?

#5. The natural draught is produced by(UP_2014_P_2)

#6. A safety valve usually employed with stationary boilers is (UP_2014_P_2)

#7. The chimney draught varies with (UP_2014_P_2)

#8. The performance of boiler is measured by the (UP_2014_P_2)

#9. The maximum heat loss in a boiler occurs due to (UP_2014_P_2)

#10. Which of the following is not a boiler mounting? (UP_2014_P_2)

#11. Which of the following are the boiler accessories? (UP_2014_P_2)

#12. The ability of a material to resist softening at high temperature is known as …. (UP_2014_P_2)

#13. Killed steels are those steels (UP_2014_P_2)

#14. Corrosion resistance of steel is increased by the addition of (UP_2014_P_2)

#15. Manganese in steel increases its (UP_2014_P_2)

#16. Brinell hardness tester uses a steel ball of size (UP_2014_P_2)

#17. In arc welding, eyes need to be protected against (UP_2014_P_2)

#18. The gases used in tungsten inert gas welding are (UP_2014_P_2)

#19. In resistance welding, voltage used for heating is (UP_2014_P_2)

#20. Seam welding is (UP_2014_P_2)

#21. Generally water pipe lines are designed with water velocity (UP_2014_P_2)

#22. In indirect steam heating, the heat utilized for heating application (UP_2014_P_2)

#23. Orsat meter is used for (UP_2014_P_2)

#24. Sulphur content of fuel is very important to the plant operator because it (UP_2014_P_2)

#25. Name the fan more suitable for high pressure application (UP_2014_P_2)

#26. Turndown Ratio of a burners is the ratio of (UP_2014_P_2)

#27. ESP works on the principle of (UP_2014_P_2)

#28. A solution having 4 pH is more acidic than a solution of 7 pH (UP_2014_P_2)

#29. Demineralisation of water is the process to remove (UP_2014_P_2)

#30. A rise in conductivity in boiler feed water indicate (UP_2014_P_2)

#31. Hooke’s law holds good up to ……(UP_2014_P_1)

#32. If equal and opposite forces applied to a body tend to elongate it, the stress so produced is called (UP_2014_P_1)

#33. Modulus of Rigidity is defined as the ratio of ……(UP_2014_P_1)

#34. The pressure at which the latent heat of vaporisation is zero is ……..(UP_2014_P_1)

#35. A thin shell of diameter d, thickness t and length is subjected to an internal pressure p. The circumferential stress in the shell is …..(UP_2014_P_1)

#36. Super heating of steam is done at………(UP_2014_P_1)

#37. If the partial pressure of air and steam in a condenser be pa and pb respectively, then according to Dalton’s law, the pressure in condenser is equal to ………….(UP_2014_P_1)

#38. Water at pressure 4 kg/cm2 and 160 °C temperature, when exposed to atmosphere will………….(UP_2014_P_1)

#39. Efficiency of a thermal cycle increases by

#40. For burning of 1 kg of carbon to CO as per chemically correct combustion, the amount of air required (UP_2014_P_1)

#41. Ultimate analysis of fuel determine the percentage of (UP_2014_P_1)

#42. Incomplete combustion can be best judged by (UP_2014_P_1)

#43. In water wall furnace the heat is transferred to water wall by (UP_2014_P_1)

#44. LMTD (log mean temperature difference) in case of counter flow compared to parallel flow heat exchanger is

#45. For industrial process heating the best quality of steam is (UP_2014_P_1)

#46. Proper sizing of steam pipe lines helps in minimizing (UP_2014_P_1)

#47. The parameter used by ASME to define fans, blowers and compressors (UP_2014_P_1)

#48. The type of control gives maximum benefit for fan application for energy saving point of view is (UP_2014_P_1)

#49. What is the impact on flow and discharge pressure when the impeller of a pump is trimmed (UP_2014_P_1)

#50. if the speed of a centrifugal pump is doubled, it power consumption will become (UP_2014_P_1)

Results

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