Sublimation region is the region where

Question

Sublimation region is the region where

A. Solid and vapour phases are in equilibrium

B. Solid and liquid phases are in equilibrium

C. Liquid and vapour phases are in equilibrium

D. Solid, liquid and vapour phases are in equilibrium

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The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

A. 10 to 15 %

B. 15 to 20 %

C. 20 to 30 %

D. 30 to 40 %

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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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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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A device used to increase the temperature of saturated steam without raising its pressure, is called

A. Blow off cock

B. Fusible plug

C. Superheater

D. Stop valve

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The temperature of flue gases at air heater outlet should be

A. 100°C

B. Above dew point temperature of flue gases

C. Below dew point temperature of flue gases

D. Less than wet bulb temperature of flue gases

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The critical pressure ratio for gases is

A. 0.528

B. 0.546

C. 0.577

D. 0.582

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The ultimate analysis of fuel lists

A. Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume

B. Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight

C. Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash

D. Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

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

A. Equal to

B. Lower than

C. Higher than

D. None of these

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The equivalent evaporation of a boiler is a measure to compare

A. The given boiler with the model

B. The two different boilers of the same make

C. Two different makes of boilers operating under the same operating conditions

D. Any type of boilers operating under any conditions

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When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, 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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Steam engine operates on

A. Carnot cycle

B. Joule cycle

C. Stirling cycle

D. Brayton cycle

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The discharge is __________ at critical pressure.

A. Zero

B. Minimum

C. Maximum

D. None of these

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The object of producing draught in a boiler is

A. To provide an adequate supply of air for the fuel combustion

B. To exhaust the gases of combustion from the combustion chamber

C. To discharge the gases of combustion to the atmosphere through the chimney

D. All of the above

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The chimney draught varies with

A. Climatic conditions

B. Temperature of furnace gases

C. Height of chimney

D. All of these

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Lancashire boiler is used where working pressure and power required are

A. Low

B. Moderate

C. High

D. None of these

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The draught in locomotive boilers is produced by a

A. Chimney

B. Centrifugal fan

C. Steam jet

D. None of these

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In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

A. 260 kW

B. 282 kW

C. 296 kW

D. 302 kW

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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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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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Pick up the correct statement as regards Cornish boiler and Lancashire boiler

A. Cornish is fire tube and Lancashire is water tube

B. Cornish is water tube and Lancashire is fire tube

C. Cornish has two fire tubes and Lancashire has one

D. Lancashire has two fire tubes and Cornish has one

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When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

A. Slow speed engine

B. Vertical steam engine

C. Condensing steam engine

D. Non-condensing steam engine

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Which of the following are boiler accessories?

A. Economiser

B. Superheater

C. Both (A) and (B)

D. None of these

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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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An economiser is installed in a boiler primarily to

A. Superheat the steam

B. Reduce fuel consumption

C. Increase steam pressure

D. All of these

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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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Lancashire boiler is

A. Stationary fire tube boiler

B. Internally fired boiler

C. Horizontal boiler

D. All of these

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The nozzle 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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The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

A. V_b = 0.5 V cosα

B. V_b = V cosα

C. V_b = 0.5 V² cosα

D. V_b = V² cosα

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The average operating pressure of Benson boiler is

A. 100 bar

B. 150 bar

C. 200 bar

D. 250 bar

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Locomotive boiler is of the following type

A. Multi tubular

B. Horizontal

C. Internally fired

D. All of the above

Discuss this answer

Accepted Answer

A. Solid and vapour phases are in equilibrium

Sublimation region is the region where

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

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

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

A device used to increase the temperature of saturated steam without raising its pressure, is called

The temperature of flue gases at air heater outlet should be

The critical pressure ratio for gases is

The ultimate analysis of fuel lists

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

The equivalent evaporation of a boiler is a measure to compare

When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Steam engine operates on

The discharge is __________ at critical pressure.

The object of producing draught in a boiler is

The chimney draught varies with

Lancashire boiler is used where working pressure and power required are

The draught in locomotive boilers is produced by a

In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

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

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

Pick up the correct statement as regards Cornish boiler and Lancashire boiler

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

Which of the following are boiler accessories?

A boiler in India should conform to safety regulations of

An economiser is installed in a boiler primarily to

In fire tube boilers

Lancashire boiler is

The nozzle efficiency is the ratio of

The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

The average operating pressure of Benson boiler is

Locomotive boiler is of the following type

Also checkout

Sublimation region is the region where

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

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

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

A device used to increase the temperature of saturated steam without raising its pressure, is called

The temperature of flue gases at air heater outlet should be

The critical pressure ratio for gases is

The ultimate analysis of fuel lists

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

The equivalent evaporation of a boiler is a measure to compare

When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Steam engine operates on

The discharge is __________ at critical pressure.

The object of producing draught in a boiler is

The chimney draught varies with

Lancashire boiler is used where working pressure and power required are

The draught in locomotive boilers is produced by a

In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

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

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

Pick up the correct statement as regards Cornish boiler and Lancashire boiler

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

Which of the following are boiler accessories?

A boiler in India should conform to safety regulations of

An economiser is installed in a boiler primarily to

In fire tube boilers

Lancashire boiler is

The nozzle efficiency is the ratio of

The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

The average operating pressure of Benson boiler is

Locomotive boiler is of the following type

Also checkout

The efficiency of an impulse turbine is maximum when (where V_b = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)