Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Question

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

A. And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

B. And its corresponding conversion into dry steam at desired boiler pressure

C. Conversion into steam at atmospheric condition

D. Conversion into steam at the same pressure at which feed water is supplied

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The specific volume of steam with increase in pressure decreases

A. Linearly

B. Slowly first and then rapidly

C. Rapidly first and then slowly

D. Inversely

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A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

A. Supplied by same manufacturer loose and assembled at site

B. Supplied mounted on a single base

C. Purchased from several parties and packed together at site

D. Packaged boiler does not exist

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The capacity of induced draft fan compared to forced draft fan in a boiler is

A. Same

B. More

C. Less

D. Less or more depending on size of boiler

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In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

A. Velocity increases

B. Velocity decreases

C. Velocity remains constant

D. Pressure remains constant

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On Mollier chart, flow through turbine is represented by

A. Horizontal straight line

B. Vertical straight line

C. Straight inclined line

D. Curved line

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The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

A. Same

B. Less

C. More

D. None of these

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A wet vapour can be completely specified by

A. Pressure only

B. Temperature only

C. Dryness fraction only

D. Pressure and dryness fraction

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In locomotive boiler, maximum steam pressure is limited to

A. 1 kg/cm²

B. 5 kg/cm²

C. 10 kg/cm²

D. 18 kg/cm²

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A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called

A. Receiver type compound engine

B. Tandem type compound engine

C. Woolf type compound engine

D. Both (A) and (B)

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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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Reheating of steam under ideal conditions takes place at constant

A. Entropy

B. Enthalpy

C. Pressure

D. Temperature

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Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

A. I.P. = a × m + b

B. m = a + b × I.P.

C. I.P. = b × m + a

D. m = (b/I.P.) - a

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Clearance ratio is the ratio of

A. Clearance volume to the swept volume

B. Clearance volume to the volume at cut-off

C. Volume at cut-off to the swept volume

D. Swept volume to the clearance volume

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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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Which of the following statement is correct?

A. A horizontal steam engine requires less floor area than a vertical steam engine

B. The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure

C. The compound steam engines are generally non-condensing steam engines

D. All of the above

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A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

A. Back pressure turbine

B. Pass out turbine

C. Low pressure turbine

D. Impulse turbine

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The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

A. Blades are equiangular

B. Blade velocity coefficient is unity

C. Blades are equiangular and frictionless

D. Blade solidity is 0.65

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Calorific value of coal is of the order of

A. 200-400 kcal/ kg

B. 800-1200 kcal/ kg

C. 2000-4000 kcal/ kg

D. 5000-8000 kcal/ kg

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In reaction turbines, the axial thrust is due to

A. Pressure drop across the rotor

B. Change in axial velocity

C. Both (A) and (B)

D. None of these

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Which of the following statement is correct?

A. The efficiency of steam turbines is greater than steam engines

B. A flywheel is a must for steam turbine

C. The turbine blades do not change the direction of steam issuing from the nozzle

D. The pressure of steam, in reaction turbines, is increased in fixed blades as well as in moving blades

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The diagram efficiency is the ratio of

A. Workdone on the blades to the energy supplied to the blades

B. Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

C. Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam

D. None of the above

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An economiser in a boiler

A. Increases steam pressure

B. Increases steam flow

C. Decreases fuel consumption

D. Decreases steam pressure

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The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)

A. T₁ /88.25H

B. 88.25H/T₁

C. T₁ /176.5H

D. 176.5H/T₁

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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 fire tubes in a Cochran boiler usually have _________ diameter.

A. 6.25 mm

B. 62.5 mm

C. 72.5 mm

D. 92.5 mm

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The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

A. Equal to

B. Less than

C. Higher than

D. None of these

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The cylinder dimensions of a compound engine may be designed on the basis of

A. Equal power developed in each cylinder for uniform turning moment

B. Equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders

C. Equal temperature drop in each cylinder for economy of steam

D. All of the above

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When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

A. Internally fired boiler

B. Externally fired boiler

C. Natural circulation boiler

D. Forced circulation boiler

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Which of the following is steam dial?

A. Non-coking bituminous coal

B. Brown coal

C. Pulverised coal

D. Coking bituminous coal

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Tertiary air is the air used to

A. Provide air around burners for obtaining optimum combustion

B. Transport and dry the coal

C. Cool the scanners

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

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Accepted Answer

A. And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The specific volume of steam with increase in pressure decreases

A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

The capacity of induced draft fan compared to forced draft fan in a boiler is

In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

On Mollier chart, flow through turbine is represented by

The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

A wet vapour can be completely specified by

In locomotive boiler, maximum steam pressure is limited to

A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called

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)

Reheating of steam under ideal conditions takes place at constant

Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Clearance ratio is the ratio of

The heat balance sheet for the boiler shows the

Which of the following statement is correct?

A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Calorific value of coal is of the order of

In reaction turbines, the axial thrust is due to

Which of the following statement is correct?

The diagram efficiency is the ratio of

An economiser in a boiler

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)

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

The fire tubes in a Cochran boiler usually have _________ diameter.

The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

The cylinder dimensions of a compound engine may be designed on the basis of

When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

Which of the following is steam dial?

Tertiary air is the air used to

Also checkout

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The specific volume of steam with increase in pressure decreases

A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

The capacity of induced draft fan compared to forced draft fan in a boiler is

In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

On Mollier chart, flow through turbine is represented by

The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

A wet vapour can be completely specified by

In locomotive boiler, maximum steam pressure is limited to

A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called

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)

Reheating of steam under ideal conditions takes place at constant

Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Clearance ratio is the ratio of

The heat balance sheet for the boiler shows the

Which of the following statement is correct?

A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Calorific value of coal is of the order of

In reaction turbines, the axial thrust is due to

Which of the following statement is correct?

The diagram efficiency is the ratio of

An economiser in a boiler

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T1 = Absolute temperature of air outside the chimney in K)

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

The fire tubes in a Cochran boiler usually have _________ diameter.

The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

The cylinder dimensions of a compound engine may be designed on the basis of

When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

Which of the following is steam dial?

Tertiary air is the air used to

Also checkout

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)

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)