Which of the following statement is wrong?

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Which of the following statement is wrong?

A. Locomotive boiler is a water tube boiler

B. Water tube boilers are internally fired

C. Lamont boiler is a low pressure water tube boiler

D. All of the above

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Alkaline pyrogallate is used in Orsat's apparatus for absorption of

A. CO₂

B. CO

C. O₂

D. N₂

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Which type of boiler can meet rapid changes of load?

A. Vertical fire tube type

B. Horizontal fire tube type

C. Horizontal water tube type

D. Forced circulation type

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The heat balance sheet for the boiler shows the

A. Complete account of heat supplied by 1 kg of dry fuel and the heat consumed

B. Moisture present in the fuel

C. Steam formed by combustion of hydrogen per kg of fuel

D. All of the above

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The difference between Cornish boiler and Lancashire boiler is that

A. Former is fire tube type and latter is water tube type boiler

B. Former is water tube type and latter is fire tube type

C. Former contains one fire tube and latter contains two fire tubes

D. None/of the above

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The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

A. η_S = η_B × η_N

B. η_S = η_B / η_N

C. η_S = η_N / η_B

D. None of these

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In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is __________ the relative velocity of steam at inlet tip of the blade.

A. Equal to

B. Less than

C. Greater than

D. None of these

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O₂ content in atmospheric air on volume basis is

A. 21 %

B. 23 %

C. 30 %

D. 40 %

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The latent heat of steam with increase of pressure

A. Remain same

B. Increases

C. Decreases

D. Behaves unpredictably

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The friction in the nozzle __________ exit velocity of steam.

A. Has no effect on

B. Decreases

C. Increases

D. None of these

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For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

A. Equal to

B. Twice

C. Three times

D. Four times

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The length of Lancashire boiler varies from

A. 5 to 6 m

B. 6 to 7 m

C. 7.25 to 9 m

D. 9 to 10 m

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Which of the following is not a boiler mounting?

A. Blow off cock

B. Feed check valve

C. Economiser

D. Fusible plug

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The evaporation of 15.653 kg of water per hour from and at 100°C is called

A. Evaporative capacity

B. Factor of evaporation

C. Equivalent evaporation

D. One boiler h.p.

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The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity V at inlet)

A. V_b = 0.5 V cosα

B. V_b = V cos α

C. V_b = 0.5 V² cosα

D. V_b = V² cosα

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Which is not correct statement about pulverised fuel firing?

A. High burning rate is possible

B. Heat release can be easily controlled

C. Fuel burns economically

D. It is the best technique for burning high ash content fuel having low fusion ash

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The condition of steam in boiler drum is always

A. Dry

B. Wet

C. Saturated

D. Supersaturated

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Cochran boiler is a

A. Horizontal fire tube boiler

B. Horizontal water tube boiler

C. Vertical water tube boiler

D. Vertical fire tube boiler

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In an impulse turbine

A. The steam is expanded in nozzles only and there is a pressure drop and heat drop

B. The steam is expanded both in fixed and moving blades continuously

C. The steam is expanded in moving blades only

D. The pressure and temperature of steam remains constant

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The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

A. 10 to 15 %

B. 15 to 20 %

C. 20 to 30 %

D. 30 to 40 %

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Which device is used in thermal power plants to reduce level of pollution?

A. Induced draft fan

B. Smoke meter

C. Chimney

D. Precipitator

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By compounding the expansion of steam in two or more cylinders, the length of stroke

A. Does not change

B. Increases

C. Decreases

D. None of these

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De-Laval turbine is a

A. Simple impulse turbine

B. Simple reaction turbine

C. Impulse-reaction turbine

D. None of these

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The principal function of a stop valve is to

A. Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required

B. Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler

C. Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit

D. Increase the temperature of saturated steam without raising its pressure

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The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)

A. V = 44.72 h_d K

B. V = 44.72 K h_d

C. V = 44.72 K h_d

D. V = 44.72 K h_d

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A valve installed between the boiler and the feed pump is

A. Blow off cock

B. Feed check valve

C. Steam stop valve

D. None of these

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The power of a boiler may be defined as

A. The ratio of heat actually used in producing the steam to the heat liberated in the furnace

B. The amount of water evaporated or steam produced in kg per kg of fuel burnt

C. The amount of water evaporated from and at 100° C into dry and saturated steam

D. The evaporation of 15.653 kg of water per hour from and at 100° C

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The efficiency of the plant __________ with the mechanical draught.

A. Increases

B. Decreases

C. Remains constant

D. None of these

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Proximate analysis of fuel is determination of percentage of

A. Carbon, hydrogen, nitrogen, sulphur, moisture

B. Fixed carbon, ash, volatile matter, moisture

C. Higher calorific value

D. Lower calorific value

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The average value of diagram factor lies between

A. 0.2 to 0.5

B. 0.5 to 0.65

C. 0.65 to 0.9

D. 0.8 to 1.2

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The action of steam in a steam turbine is

A. Static

B. Dynamic

C. Static and dynamic

D. Neither static nor dynamic

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Accepted Answer

D. All of the above

Which of the following statement is wrong?

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

Alkaline pyrogallate is used in Orsat's apparatus for absorption of

Which type of boiler can meet rapid changes of load?

The heat balance sheet for the boiler shows the

The difference between Cornish boiler and Lancashire boiler is that

The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is __________ the relative velocity of steam at inlet tip of the blade.

O₂ content in atmospheric air on volume basis is

The latent heat of steam with increase of pressure

The friction in the nozzle __________ exit velocity of steam.

For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

The length of Lancashire boiler varies from

Which of the following is not a boiler mounting?

The evaporation of 15.653 kg of water per hour from and at 100°C is called

The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity V at inlet)

Which is not correct statement about pulverised fuel firing?

The condition of steam in boiler drum is always

Cochran boiler is a

In an impulse turbine

The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

Which device is used in thermal power plants to reduce level of pollution?

By compounding the expansion of steam in two or more cylinders, the length of stroke

De-Laval turbine is a

The principal function of a stop valve is to

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)

A valve installed between the boiler and the feed pump is

The power of a boiler may be defined as

The efficiency of the plant __________ with the mechanical draught.

Proximate analysis of fuel is determination of percentage of

The average value of diagram factor lies between

The action of steam in a steam turbine is

Also checkout

Which of the following statement is wrong?

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

Alkaline pyrogallate is used in Orsat's apparatus for absorption of

Which type of boiler can meet rapid changes of load?

The heat balance sheet for the boiler shows the

The difference between Cornish boiler and Lancashire boiler is that

The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is __________ the relative velocity of steam at inlet tip of the blade.

O₂ content in atmospheric air on volume basis is

The latent heat of steam with increase of pressure

The friction in the nozzle __________ exit velocity of steam.

For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

The length of Lancashire boiler varies from

Which of the following is not a boiler mounting?

The evaporation of 15.653 kg of water per hour from and at 100°C is called

The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity V at inlet)

Which is not correct statement about pulverised fuel firing?

The condition of steam in boiler drum is always

Cochran boiler is a

In an impulse turbine

The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

Which device is used in thermal power plants to reduce level of pollution?

By compounding the expansion of steam in two or more cylinders, the length of stroke

De-Laval turbine is a

The principal function of a stop valve is to

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

A valve installed between the boiler and the feed pump is

The power of a boiler may be defined as

The efficiency of the plant __________ with the mechanical draught.

Proximate analysis of fuel is determination of percentage of

The average value of diagram factor lies between

The action of steam in a steam turbine is

Also checkout

The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)