Ultimate analysis of fuel is determination of percentage of

Question

Ultimate 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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In regenerative air preheaters, the heat is transferred

A. From a metal wall from one medium to another

B. From heating an intermediate material and then heating the air from this material

C. By direct mixing

D. Heat is transferred by bleeding some gas from furnace

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The actual vacuum in a condenser is equal to

A. Barometric pressure + actual pressure

B. Barometric pressure - actual pressure

C. Gauge pressure + atmospheric pressure

D. Gauge pressure - atmospheric pressure

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Feed water conditioning in thermal power plants in done to

A. Reduce hardness and for removal of solids

B. Increase efficiency of thermal power plant

C. Increase heat transfer rate

D. Increase steam parameters

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The radius of a dished head is taken approximately as

A. One fourth

B. Half

C. One

D. Two

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For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

A. More

B. Less

C. Equal

D. None of these

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A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimney, is known as

A. Economiser

B. Fusible plug

C. Superheater

D. Stop valve

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Sulphur in coal results in

A. Corroding air heaters

B. Spontaneous combustion during coal storage

C. Facilitating ash precipitation

D. All of the above

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The cylindrical shell of a Lancashire boiler has diameter from

A. 1 to 2 m

B. 1.25 to 2.25 m

C. 1.5 to 2.5 m

D. 1.75 to 2.75 m

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The balanced draft furnace is one using

A. Induced draft fan and chimney

B. Induced draft fan and forced draft fan

C. Forced draft fan and chimney

D. Any one of the above

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The steam enters the nozzle at a

A. High pressure and a low velocity

B. High pressure and a high velocity

C. Low pressure and a low velocity

D. Low pressure and a high velocity

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The relative heat absorption for successively added equal areas of boiler convection heating surfaces

A. Increases

B. Decreases

C. Remain unaffected

D. First increases and then decreases

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Which of the following statement is wrong?

A. The factor of evaporation for all boilers is always greater than unity.

B. The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.

C. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.

D. None of the above

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The mechanical draught _________ with the amount of smoke.

A. Increases

B. Decreases

C. Does not effect

D. None of these

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Steam turbines are used for

A. Large marine propulsion

B. Electric power generation

C. Direct drive of fans, compressors, pumps

D. All of these

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In natural circulation type boiler,

A. Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

B. Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam

C. Feed pump is employed to supplement natural circulation in water wall type furnace

D. Water is converted into steam in one. Pass without any recirculation

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In forced circulation steam boilers, the force is applied

A. To draw water

B. To circulate water

C. To drain off the water

D. All of these

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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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When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

A. Choked

B. Under-damping

C. Over-damping

D. None of these

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The diameter of flue tube in a Cornish boiler is _________ that of the shell.

A. One-fourth

B. One-third

C. Two-fifth

D. Three-fifth

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Incomplete combustion can be best judged by

A. Smoky chimney exit

B. Excess air in flue gases

C. Measuring carbon monoxide in flue gases

D. Measuring temperature of flue gases at exit of furnace

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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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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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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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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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Stoichiometric quantity of air is the

A. Air present in atmosphere at NTP conditions

B. Air required for complete combustion of fuel with no excess air

C. Air required for optimum combustion so as to have reasonable excess air

D. Air required to convert CO into CO₂

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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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For water, at pressures below atmospheric;

A. Melting point rises slightly and boiling point drops markedly

B. Melting point rises markedly and boiling point drops markedly

C. Melting point drops slightly and boiling point drops markedly

D. Melting point drops slightly and boiling point drops slightly

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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 180° 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 turbine blades are

A. Straight

B. Circular

C. Curved

D. None of these

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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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Accepted Answer

A. Carbon, hydrogen, nitrogen, sulphur, moisture

Ultimate analysis of fuel is determination of percentage of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

In regenerative air preheaters, the heat is transferred

The actual vacuum in a condenser is equal to

Feed water conditioning in thermal power plants in done to

The radius of a dished head is taken approximately as

For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimney, is known as

Sulphur in coal results in

The cylindrical shell of a Lancashire boiler has diameter from

The balanced draft furnace is one using

The steam enters the nozzle at a

The relative heat absorption for successively added equal areas of boiler convection heating surfaces

Which of the following statement is wrong?

The mechanical draught _________ with the amount of smoke.

Steam turbines are used for

In natural circulation type boiler,

In forced circulation steam boilers, the force is applied

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

When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

The diameter of flue tube in a Cornish boiler is _________ that of the shell.

Incomplete combustion can be best judged by

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

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)

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

An economiser in a boiler

Stoichiometric quantity of air is the

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)

For water, at pressures below atmospheric;

A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

The turbine blades are

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

Also checkout

Ultimate analysis of fuel is determination of percentage of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

In regenerative air preheaters, the heat is transferred

The actual vacuum in a condenser is equal to

Feed water conditioning in thermal power plants in done to

The radius of a dished head is taken approximately as

For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimney, is known as

Sulphur in coal results in

The cylindrical shell of a Lancashire boiler has diameter from

The balanced draft furnace is one using

The steam enters the nozzle at a

The relative heat absorption for successively added equal areas of boiler convection heating surfaces

Which of the following statement is wrong?

The mechanical draught _________ with the amount of smoke.

Steam turbines are used for

In natural circulation type boiler,

In forced circulation steam boilers, the force is applied

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

When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

The diameter of flue tube in a Cornish boiler is _________ that of the shell.

Incomplete combustion can be best judged by

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

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)

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

An economiser in a boiler

Stoichiometric quantity of air is the

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)

For water, at pressures below atmospheric;

A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

The turbine blades are

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

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)