Sulphur content of fuels is very important to the plant operators because it

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Sulphur content of fuels is very important to the plant operators because it

A. Has high heating value

B. Retards electric precipitation

C. Promotes complete combustion

D. Has highly corrosive effect

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The fire tubes in a Locomotive boiler has _________ diameter.

A. 4.75 mm

B. 5.47 mm

C. 7.45 mm

D. 47.5 mm

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Secondary air is the air used to

A. Provide air around burners for obtaining optimum combustion

B. Transport and dry the coal

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

D. Air delivered by induced draft fan

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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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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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In locomotives, the draught is produced by

A. Chimney

B. Induced draft fan

C. Both combined (A) and (B)

D. Steam jet draught

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The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

A. Wet

B. Superheated

C. Remain dry saturated

D. Dry

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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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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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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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One kilowatt-hour energy is equivalent to

A. 1000 J

B. 360 kJ

C. 3600 kJ

D. 3600 kW/sec

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

A. Condenser efficiency

B. Nozzle efficiency

C. Boiler efficiency

D. Vacuum efficiency

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The ratio of the clearance volume to the swept volume is called

A. Cut-off ratio

B. Expansion ratio

C. Clearance ratio

D. None of these

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The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

A. η_S = η_B × η_N

B. η_S = η_B / η_N

C. η_S = η_N / η_B

D. None of these

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The water tubes in a simple vertical boiler are

A. Horizontal

B. Vertical

C. Inclined

D. None of these

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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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In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

A. Remain unaffected

B. Improve

C. Worsen

D. May improve/worsen depending on size

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Throttle governing of steam engines is a method of controlling the engine output by varying

A. Volume of intake steam

B. Pressure of intake steam

C. Temperature of intake steam

D. All of these

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Coke is produced by

A. Pulverising coal in inert atmosphere

B. Heating wood in a limited supply of air at temperatures below 300°C

C. Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

D. Enriching carbon in the coal

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Expanding steam to a very low pressure (high vacuum) in steam engines is

A. Desirable

B. Economical

C. Essential

D. Uneconomical

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An ideal regenerative cycle is

A. Equal to Carnot cycle

B. Less than Carnot cycle

C. More than Carnot cycle

D. Could be anything

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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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The expansion of steam in a nozzle follows

A. Carnot cycle

B. Rankine cycle

C. Joule cycle

D. Stirling cycle

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A supercritical boiler is one that operates above the pressure and temperature of following values

A. 100 kg/cm² and 540°C

B. 1 kg/cm² and 100°C

C. 218 kg/cm² abs and 373°C

D. 218 kg/cm² abs and 540°C

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In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

A. 10 atmospheres

B. 20 atmospheres

C. 30 atmospheres

D. 40 atmospheres

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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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Which of the following statement is wrong?

A. The mechanical draught reduces the height of chimney.

B. The natural draught reduces the fuel consumption.

C. A balanced draught is a combination of induced and forced draught.

D. All of the above

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The ratio of heat equivalent to brake power to the energy supplied in steam is known as

A. Mechanical efficiency

B. Overall efficiency

C. Indicated thermal efficiency

D. Brake thermal efficiency

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De-Laval turbine is a

A. Simple impulse turbine

B. Simple reaction turbine

C. Impulse-reaction turbine

D. None of these

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Rateau turbine is

A. Simple reaction turbine

B. Velocity compounded turbine

C. Pressure compounded turbine

D. Pressure-velocity compounded turbine

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Accepted Answer

D. Has highly corrosive effect

Sulphur content of fuels is very important to the plant operators because it

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The fire tubes in a Locomotive boiler has _________ diameter.

Secondary air is the air used to

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

A stage, in reaction turbine, is represented by

In locomotives, the draught is produced by

The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

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)

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

In fire tube boilers

One kilowatt-hour energy is equivalent to

The object of producing draught in a boiler is

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

The ratio of the clearance volume to the swept volume is called

The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

The water tubes in a simple vertical boiler are

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

In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Throttle governing of steam engines is a method of controlling the engine output by varying

Coke is produced by

Expanding steam to a very low pressure (high vacuum) in steam engines is

An ideal regenerative cycle is

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

The expansion of steam in a nozzle follows

A supercritical boiler is one that operates above the pressure and temperature of following values

In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

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

Which of the following statement is wrong?

The ratio of heat equivalent to brake power to the energy supplied in steam is known as

De-Laval turbine is a

Rateau turbine is

Also checkout

Sulphur content of fuels is very important to the plant operators because it

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The fire tubes in a Locomotive boiler has _________ diameter.

Secondary air is the air used to

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

A stage, in reaction turbine, is represented by

In locomotives, the draught is produced by

The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

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)

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

In fire tube boilers

One kilowatt-hour energy is equivalent to

The object of producing draught in a boiler is

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

The ratio of the clearance volume to the swept volume is called

The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

The water tubes in a simple vertical boiler are

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

In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Throttle governing of steam engines is a method of controlling the engine output by varying

Coke is produced by

Expanding steam to a very low pressure (high vacuum) in steam engines is

An ideal regenerative cycle is

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

The expansion of steam in a nozzle follows

A supercritical boiler is one that operates above the pressure and temperature of following values

In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

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

Which of the following statement is wrong?

The ratio of heat equivalent to brake power to the energy supplied in steam is known as

De-Laval turbine is a

Rateau turbine is

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)

The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)