The basic job of feed water treatment in boilers is to overcome the problem of

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The basic job of feed water treatment in boilers is to overcome the problem of

A. Corrosion

B. Scale

C. Carryover

D. All of the above

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The saturation temperature of steam with increase in pressure increases

A. Linearly

B. Rapidly first and then slowly

C. Slowly first and then rapidly

D. Inversely

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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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Reheating of steam in a turbine

A. Increases the workdone through the turbine

B. Increases the efficiency of the turbine

C. Reduces wear on the blades

D. All of these

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The numbers of fire tubes in a Cochran boiler are

A. 75

B. 115

C. 165

D. 225

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The selection of type and size of a steam boiler depends upon

A. The power required and working pressure

B. The geographical position of the power house

C. The fuel and water available

D. All of the above

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During storage, the heating value of coal

A. Increases

B. Decreases

C. Remain constant

D. May increase or decrease depending upon the method of storage

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Caking coals are those which

A. Form lumps or masses of coke

B. Burn freely

C. Show little or no fusing action

D. Burn completely

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Lancashire boiler is

A. Stationary fire tube boiler

B. Internally fired boiler

C. Horizontal boiler

D. All of these

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The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

A. Same

B. Less

C. More

D. None of these

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While steam expands in turbines, theoretically the entropy

A. Remains constant

B. Increases

C. Decreases

D. Behaves unpredictably

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With increase in load, radiant superheater has

A. Drooping characteristic

B. Linear characteristic

C. Rising characteristic

D. Flat characteristic

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The crown of the fire box is made hemispherical in order to

A. Give maximum space

B. Give maximum strength

C. Withstand pressure inside boiler

D. Resist intense heat in fire box

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Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)

A. p_a = p_m/K

B. p_a = p_m × K

C. p_a = K/p_m

D. p_a = p_m + K

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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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A regenerative steam cycle renders

A. Increased work output per unit mass of steam

B. Decreased work output per unit mass of steam

C. Increased thermal efficiency

D. Decreased work output per unit mass of steam as well as increased thermal efficiency

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Boiler parameters are expressed by

A. Tonnes/hr. of steam

B. Pressure of steam in kg/cm²

C. Temperature of steam in °C

D. All of the above

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In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

A. 160/3 m/s

B. 320/3 m/s

C. 640/3 m/s

D. 640 m/s

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Adiabatic process is

A. Essentially an isentropic process

B. Non-heat transfer process

C. Reversible process

D. Constant temperature process

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When the nozzle operates with the maximum mass flow, the nozzle is said to be

A. Choked

B. Under-damping

C. Over-damping

D. None of these

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The high pressure boiler is one, which produces steam at a pressure more than

A. Atmospheric pressure

B. 5 kg/cm²

C. 10 kg/cm²

D. 7580 kg/cm²

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Heating wet steam at constant temperature is heating it at constant

A. Volume

B. Pressure

C. Entropy

D. Enthalpy

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The reheat factor is the ratio of the

A. Cumulative heat drop to the isentropic heat drop

B. Isentropic heat drop to the heat supplied

C. Total useful heat drop to the total isentropic heat drop

D. None of the above

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If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

A. Throttling calorimeter

B. Separating calorimeter

C. Combined separating and throttling calorimeter

D. Bucket calorimeter

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Secondary 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 induced draft fan

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Curtis turbine is a

A. Simple reaction turbine

B. Velocity compounded turbine

C. Pressure compounded turbine

D. Pressure-velocity compounded turbine

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A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

A. Blow off cock

B. Fusible plug

C. Superheater

D. Stop valve

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A boiler in India should conform to safety regulations of

A. DIN

B. BS

C. ASTM

D. IBR

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Which of the following is a water tube boiler?

A. Lancashire boiler

B. Babcock and Wilcox boiler

C. Locomotive boiler

D. Cochran boiler

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In a nozzle, whole frictional loss is assumed to occur between

A. Inlet and throat

B. Inlet and outlet

C. Throat and exit

D. All of these

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The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.

A. Remains same

B. Decreases

C. Increases

D. None of these

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Accepted Answer

D. All of the above

The basic job of feed water treatment in boilers is to overcome the problem of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The saturation temperature of steam with increase in pressure increases

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

Reheating of steam in a turbine

The numbers of fire tubes in a Cochran boiler are

The selection of type and size of a steam boiler depends upon

During storage, the heating value of coal

Caking coals are those which

Lancashire boiler is

The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

While steam expands in turbines, theoretically the entropy

With increase in load, radiant superheater has

The crown of the fire box is made hemispherical in order to

Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)

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 regenerative steam cycle renders

Boiler parameters are expressed by

In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

Adiabatic process is

When the nozzle operates with the maximum mass flow, the nozzle is said to be

The high pressure boiler is one, which produces steam at a pressure more than

Heating wet steam at constant temperature is heating it at constant

The reheat factor is the ratio of the

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Secondary air is the air used to

Curtis turbine is a

A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

A boiler in India should conform to safety regulations of

Which of the following is a water tube boiler?

In a nozzle, whole frictional loss is assumed to occur between

The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.

Also checkout

The basic job of feed water treatment in boilers is to overcome the problem of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The saturation temperature of steam with increase in pressure increases

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

Reheating of steam in a turbine

The numbers of fire tubes in a Cochran boiler are

The selection of type and size of a steam boiler depends upon

During storage, the heating value of coal

Caking coals are those which

Lancashire boiler is

The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

While steam expands in turbines, theoretically the entropy

With increase in load, radiant superheater has

The crown of the fire box is made hemispherical in order to

Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

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 regenerative steam cycle renders

Boiler parameters are expressed by

In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

Adiabatic process is

When the nozzle operates with the maximum mass flow, the nozzle is said to be

The high pressure boiler is one, which produces steam at a pressure more than

Heating wet steam at constant temperature is heating it at constant

The reheat factor is the ratio of the

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Secondary air is the air used to

Curtis turbine is a

A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

A boiler in India should conform to safety regulations of

Which of the following is a water tube boiler?

In a nozzle, whole frictional loss is assumed to occur between

The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.

Also checkout

Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)