The ratio of brake power to the indicated power is known as

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The ratio of brake power to the indicated power is known as

A. Mechanical efficiency

B. Overall efficiency

C. Indicated thermal efficiency

D. Brake thermal efficiency

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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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The critical pressure gives the velocity of steam at the throat

A. Equal to the velocity of sound

B. Less than the velocity of sound

C. More than the velocity of sound

D. None of these

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The steam temperature with increase in load in case of a boiler fitted with radiation superheater

A. Increases

B. Decreases

C. Remain unaffected

D. First increases and then decreases

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The performance of a boiler is measured by the

A. Amount of water evaporated per hour

B. Steam produced in kg/h

C. Steam produced in kg/kg of fuel burnt

D. All of these

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A valve installed between the boiler and the feed pump is

A. Blow off cock

B. Feed check valve

C. Steam stop valve

D. None of these

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The main object of a boiler trial is

A. To determine the generating capacity of the boiler

B. To determine the thermal efficiency of the boiler when working at a definite pressure

C. To prepare heat balance sheet for the boiler

D. All of the above

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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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Water boils when its vapour pressure

A. Equals that of the surroundings

B. Equals 760 mm of mercury

C. Equals to atmospheric pressure

D. Equals the pressure of water in the container

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Which of the following statement is wrong?

A. Locomotive boiler is a water tube boiler

B. Water tube boilers are internally fired

C. Lamont boiler is a low pressure water tube boiler

D. All of the above

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The difference between Cornish boiler and Lancashire boiler is that

A. Former is fire tube type and latter is water tube type boiler

B. Former is water tube type and latter is fire tube type

C. Former contains one fire tube and latter contains two fire tubes

D. None/of the above

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Duplex feed pumps are used in small steam boilers. These operate on the principle of

A. Centrifugal pump

B. Axial flow pump

C. Gear pump

D. Reciprocating pump

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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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The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

A. 180° to each other

B. 90° to each other

C. 0° to each other

D. None of these

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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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Fusible plug for boilers is made of fusible metal containing tin, lead, and

A. Bismuth

B. Copper

C. Aluminium

D. Nickel

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Which of the following boiler is best suited to meet the fluctuating demand of steam?

A. Locomotive boiler

B. Lancashire boiler

C. Cornish boiler

D. Babcock and Wilcox boiler

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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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De-Laval turbines are mostly used

A. Where low speeds are required

B. For small power purposes and low speeds

C. For large power purposes

D. For small power purposes and high speeds

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A binary vapour plant consists of

A. Steam turbine

B. Steam condenser

C. Mercury boiler

D. All of these

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Presence of moisture in fuel oil would

A. Keep the burner tips cool

B. Aid in proper combustion

C. Because sputtering, possibly extinguishing flame

D. Clean the nozzles

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Which type of boiler can meet rapid changes of load?

A. Vertical fire tube type

B. Horizontal fire tube type

C. Horizontal water tube type

D. Forced circulation type

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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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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 bituminous coal is no caking if its carbon content is

A. 78-81 %

B. 81-85 %

C. 85-90 %

D. 90-95 %

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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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The friction in the nozzle __________ exit velocity of steam.

A. Has no effect on

B. Decreases

C. Increases

D. None of these

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Hygrometry deals with the

A. Hygroscopic substances

B. Water vapour in air

C. Temperature of air

D. Pressure of air

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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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The condition of steam in boiler drum is always

A. Dry

B. Wet

C. Saturated

D. Supersaturated

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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

Discuss this answer

Accepted Answer

A. Mechanical efficiency

The ratio of brake power to the indicated power is known as

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

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

The critical pressure gives the velocity of steam at the throat

The steam temperature with increase in load in case of a boiler fitted with radiation superheater

The performance of a boiler is measured by the

A valve installed between the boiler and the feed pump is

The main object of a boiler trial is

Boiler parameters are expressed by

Water boils when its vapour pressure

Which of the following statement is wrong?

The difference between Cornish boiler and Lancashire boiler is that

Duplex feed pumps are used in small steam boilers. These operate on the principle of

Fire tube boilers are those in which

The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

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

Fusible plug for boilers is made of fusible metal containing tin, lead, and

Which of the following boiler is best suited to meet the fluctuating demand of steam?

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)

De-Laval turbines are mostly used

A binary vapour plant consists of

Presence of moisture in fuel oil would

Which type of boiler can meet rapid changes of load?

Reheating of steam under ideal conditions takes place at constant

An economiser in a boiler

The bituminous coal is no caking if its carbon content is

The efficiency of a boiler is defined as

The friction in the nozzle __________ exit velocity of steam.

Hygrometry deals with the

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

The condition of steam in boiler drum is always

In locomotive boiler, maximum steam pressure is limited to

Also checkout

The ratio of brake power to the indicated power is known as

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

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

The critical pressure gives the velocity of steam at the throat

The steam temperature with increase in load in case of a boiler fitted with radiation superheater

The performance of a boiler is measured by the

A valve installed between the boiler and the feed pump is

The main object of a boiler trial is

Boiler parameters are expressed by

Water boils when its vapour pressure

Which of the following statement is wrong?

The difference between Cornish boiler and Lancashire boiler is that

Duplex feed pumps are used in small steam boilers. These operate on the principle of

Fire tube boilers are those in which

The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

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

Fusible plug for boilers is made of fusible metal containing tin, lead, and

Which of the following boiler is best suited to meet the fluctuating demand of steam?

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)

De-Laval turbines are mostly used

A binary vapour plant consists of

Presence of moisture in fuel oil would

Which type of boiler can meet rapid changes of load?

Reheating of steam under ideal conditions takes place at constant

An economiser in a boiler

The bituminous coal is no caking if its carbon content is

The efficiency of a boiler is defined as

The friction in the nozzle __________ exit velocity of steam.

Hygrometry deals with the

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

The condition of steam in boiler drum is always

In locomotive boiler, maximum steam pressure is limited to

Also checkout

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)