Willians line for the steam engine is a straight line relationship between the steam consumption per hour and

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Willians line for the steam engine is a straight line relationship between the steam consumption per hour and

A. Indicated power

B. Brake power

C. Efficiency

D. Pressure of steam

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For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then

A. α₁ = α₂ and β₁ = β₂

B. α₁ = β₁ and α₂= β₂

C. α₁ < β₁ and α₂ > β₂

D. α₁ = β₂ and β₁ = α₂

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

A. Does not change

B. Increases

C. Decreases

D. None of these

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Primary air is the air used to

A. Provide air around burners for obtaining optimum combustion

B. Transport and dry the coal

C. Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

D. Air delivered by forced draft fan

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The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

A. V_b = 0.5 V cosα

B. V_b = V cosα

C. V_b = 0.5 V² cosα

D. V_b = V² cosα

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Sulphur content of fuels is very important to the plant operators because it

A. Has high heating value

B. Retards electric precipitation

C. Promotes complete combustion

D. Has highly corrosive effect

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The number of drums in Benson steam generator is

A. One

B. Two

C. One steam drum and one water drum

D. No drum

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The major axis of elliptical manholes on the shell should be provided

A. Longitudinally

B. Circumferentially

C. On dished end

D. Anywhere

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The high steam and low water safety valve is used to blow off steam when the

A. Steam pressure exceeds the working pressure

B. Water level in the boiler becomes too low

C. Both (A) and (B)

D. None of the above

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The ratio of heat equivalent to brake power to the energy supplied in steam is known as

A. Mechanical efficiency

B. Overall efficiency

C. Indicated thermal efficiency

D. Brake thermal efficiency

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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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Pulverised fuel is used for

A. Better burning

B. More calorific value

C. Less radiation loss

D. Medium sized units

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The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

A. V = 2g H'

B. V = 2g/H'

C. V = H'/2g

D. V = 2gH'

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Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)

A. 1/(I.P)

B. 1/(I.P)²

C. I.P.

D. (I.P.)²

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The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

A. Induced steam jet draught

B. Chimney draught

C. Forced steam jet draught

D. None of these

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The water tubes in a Babcock and Wilcox boiler are

A. Horizontal

B. Vertical

C. Inclined

D. Horizontal and inclined

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A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

A. 79 m/s

B. 188 m/s

C. 450 m/s

D. 900 m/s

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Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

A. Higher effectiveness of boiler

B. High calorific value coal being burnt

C. Fouling of heat transfer surfaces

D. Raising of steam temperature

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The function of injector used in small steam plants is to

A. Create vacuum in furnace

B. Create vacuum at turbine exhaust

C. Pump feed water

D. Dose chemicals in feed water

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The actual power supplied by the engine crankshaft is called

A. Indicated power

B. Brake power

C. Frictional power

D. None of these

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An ideal regenerative cycle is

A. Equal to Carnot cycle

B. Less than Carnot cycle

C. More than Carnot cycle

D. Could be anything

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The flow through a nozzle is regarded as

A. Constant volume flow

B. Constant pressure flow

C. Isothermal flow

D. Isentropic flow

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The best suited coal for chain or travelling grate stoker boiler is

A. Coking coal

B. Non-coking or free burning coal

C. Pulverised coal

D. High sulphur coal

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In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

A. 3.3 bar

B. 5.46 bar

C. 8.2 bar

D. 9.9 bar

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Which of the following statement is wrong?

A. The mechanical draught reduces the height of chimney.

B. The natural draught reduces the fuel consumption.

C. A balanced draught is a combination of induced and forced draught.

D. All of the above

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Which of the following boilers is best suited to meet fluctuating demands?

A. Babcock and Wilcox

B. Locomotive

C. Lancashire

D. Cochran

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The biggest size of thermal power unit operating in India is

A. 30 MW

B. 60 MW

C. 100 MW

D. 500 MW

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De-Laval turbine is a

A. Single rotor impulse turbine

B. Multi-rotor impulse turbine

C. Impulse reaction turbine

D. None of these

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Vacuum for reciprocating steam engines compared to steam turbines is

A. More

B. Equal

C. Less

D. Could be more or less depending on the size of plant

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For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be

A. One-half the height of chimney

B. Equal to the height of chimney

C. Two times the height of chimney

D. Four times the height of chimney

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Accepted Answer

A. Indicated power

Willians line for the steam engine is a straight line relationship between the steam consumption per hour and

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then

The action of steam in a steam turbine is

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

Primary air is the air used to

The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

Sulphur content of fuels is very important to the plant operators because it

The number of drums in Benson steam generator is

The major axis of elliptical manholes on the shell should be provided

The high steam and low water safety valve is used to blow off steam when the

The ratio of heat equivalent to brake power to the energy supplied in steam is known as

The latent heat of steam with increase of pressure

Pulverised fuel is used for

The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)

The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

The water tubes in a Babcock and Wilcox boiler are

A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

The function of injector used in small steam plants is to

The actual power supplied by the engine crankshaft is called

An ideal regenerative cycle is

The flow through a nozzle is regarded as

The best suited coal for chain or travelling grate stoker boiler is

In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

Which of the following statement is wrong?

Which of the following boilers is best suited to meet fluctuating demands?

The biggest size of thermal power unit operating in India is

De-Laval turbine is a

Vacuum for reciprocating steam engines compared to steam turbines is

For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be

Also checkout

Willians line for the steam engine is a straight line relationship between the steam consumption per hour and

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then

The action of steam in a steam turbine is

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

Primary air is the air used to

The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

Sulphur content of fuels is very important to the plant operators because it

The number of drums in Benson steam generator is

The major axis of elliptical manholes on the shell should be provided

The high steam and low water safety valve is used to blow off steam when the

The ratio of heat equivalent to brake power to the energy supplied in steam is known as

The latent heat of steam with increase of pressure

Pulverised fuel is used for

The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)

The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

The water tubes in a Babcock and Wilcox boiler are

A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

The function of injector used in small steam plants is to

The actual power supplied by the engine crankshaft is called

An ideal regenerative cycle is

The flow through a nozzle is regarded as

The best suited coal for chain or travelling grate stoker boiler is

In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

Which of the following statement is wrong?

Which of the following boilers is best suited to meet fluctuating demands?

The biggest size of thermal power unit operating in India is

De-Laval turbine is a

Vacuum for reciprocating steam engines compared to steam turbines is

For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be

Also checkout

The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)