Fire tube boilers are

Question

Fire tube boilers are

A. Internally fired

B. Externally fired

C. Internally as well as externally fired

D. None of these

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A stage, in reaction turbine, is represented by

A. Number of casing

B. Number of entries of steam

C. Number of exits of steam

D. Each row of blades

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The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

A. Feed pump

B. Injector

C. Feed check valve

D. Pressure gauge

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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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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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The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

A. Remains constant

B. Decreases

C. Increases

D. None of these

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In designing air preheaters, the important design consideration is that

A. Approach temperature should be as low as possible

B. Handling and maintenance should be easier

C. Heat transfer area should be optimum

D. Stack gases should not be cooled to the dew point

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When the total heat of steam is h kJ/kg and the sensible heat of feed water is h_f1 kJ/kg, then the factor of evaporation is given by

A. (h - h_f1)/2257

B. (h + h_f1)/2257

C. (h × h_f1)/2257

D. None of these

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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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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 function of a crosshead is to guide motion of the _________ and to prevent it from bending.

A. Piston rod

B. Connecting rod

C. Eccentric rod

D. Valve rod

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In fire tube boilers

A. Water passes through the tubes which are surrounded by flames and hot gases

B. The flames and hot gases pass through the tubes which are surrounded by water

C. Forced circulation takes place

D. None of these

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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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The shell of the Cochran boiler is made hemispherical

A. To give maximum space and strength

B. To withstand the pressure of steam inside the boiler

C. Both (A) and (B)

D. None of the above

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The diagram factor is the ratio of the

A. Area of the actual indicator diagram to the area of theoretical indicator diagram

B. Actual workdone per stroke to the theoretical workdone per stroke

C. Actual mean effective pressure to the theoretical mean effective pressure

D. Any one of the above

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The height of chimney in a power plant is governed by

A. The draft to be created

B. Limitation of construction facilities

C. Control of pollution

D. Quantity of flue gases to be handled

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In a reaction turbine, when steam flows through the moving blades,

A. Pressure increases while velocity decreases

B. Pressure decreases while velocity increases

C. Pressure and velocity both decreases

D. Pressure and velocity both increases

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Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

A. A steam turbine develops higher speeds

B. The efficiency of steam turbine is higher

C. The steam consumption is less

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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The effect of bleeding is that

A. It increases the thermodynamic efficiency of the turbine

B. Boiler is supplied with hot water

C. It decreases the power developed by the turbine

D. All of the above

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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 ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

A. Equivalent evaporation

B. Factor of evaporation

C. Boiler efficiency

D. Power of a boiler

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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 ratio of total useful heat drop to the total isentropic heat drop, is called

A. Stage efficiency

B. Internal efficiency

C. Rankine efficiency

D. None of these

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In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

A. Equal to

B. Lower than

C. Higher than

D. None of these

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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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The water tubes in a Babcock and Wilcox boiler are

A. Horizontal

B. Vertical

C. Inclined

D. Horizontal and inclined

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The turbine blades are

A. Straight

B. Circular

C. Curved

D. None of these

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If partial pressure of air and steam be p_a and p_s respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

A. p_s - p_a

B. p_a - p_s

C. p_a + p_s

D. None of these

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The efficiency of a boiler is defined as

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

B. Ratio of the mass of steam produced to the mass of total water supplied in a given time

C. Ratio of the heat liberated in the furnace to the heat actually used in producing steam

D. None of the above

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Fire tube boilers are those in which

A. Flue gases pass through tubes and water around it

B. Water passes through the tubes and flue gases around it

C. Forced circulation takes place

D. Tubes are laid vertically

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Accepted Answer

A. Internally fired

Fire tube boilers are

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

A stage, in reaction turbine, is represented by

The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

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

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

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

In designing air preheaters, the important design consideration is that

When the total heat of steam is h kJ/kg and the sensible heat of feed water is h_f1 kJ/kg, then the factor of evaporation is given by

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

The function of injector used in small steam plants is to

The function of a crosshead is to guide motion of the _________ and to prevent it from bending.

In fire tube boilers

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

The shell of the Cochran boiler is made hemispherical

The diagram factor is the ratio of the

The height of chimney in a power plant is governed by

In a reaction turbine, when steam flows through the moving blades,

Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

In natural circulation type boiler,

The effect of bleeding is that

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

The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

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

The ratio of total useful heat drop to the total isentropic heat drop, is called

In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

Ultimate analysis of fuel is determination of percentage of

The water tubes in a Babcock and Wilcox boiler are

The turbine blades are

If partial pressure of air and steam be p_a and p_s respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

The efficiency of a boiler is defined as

Fire tube boilers are those in which

Also checkout

Fire tube boilers are

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

A stage, in reaction turbine, is represented by

The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

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

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

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

In designing air preheaters, the important design consideration is that

When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

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

The function of injector used in small steam plants is to

The function of a crosshead is to guide motion of the _________ and to prevent it from bending.

In fire tube boilers

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

The shell of the Cochran boiler is made hemispherical

The diagram factor is the ratio of the

The height of chimney in a power plant is governed by

In a reaction turbine, when steam flows through the moving blades,

Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

In natural circulation type boiler,

The effect of bleeding is that

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

The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

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

The ratio of total useful heat drop to the total isentropic heat drop, is called

In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

Ultimate analysis of fuel is determination of percentage of

The water tubes in a Babcock and Wilcox boiler are

The turbine blades are

If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

The efficiency of a boiler is defined as

Fire tube boilers are those in which

Also checkout

When the total heat of steam is h kJ/kg and the sensible heat of feed water is h_f1 kJ/kg, then the factor of evaporation is given by

If partial pressure of air and steam be p_a and p_s respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to