The missing quantity per stroke is equal to

Question

The missing quantity per stroke is equal to

A. Cylinder feed indicated mass of steam

B. Cylinder feed + indicated mass of steam

C. Mass of cushion steam + indicated mass of steam

D. Mass of cushion steam + cylinder feed

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Hard coke is produced by carburisation of coal at

A. Atmospheric temperature

B. 500-600°C

C. 700-850°C

D. 950-1100°C

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The draught may be produced by a

A. Mechanical fan

B. Chimney

C. A steam jet

D. All of these

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Pulverised fuel is used for

A. Better burning

B. More calorific value

C. Less radiation loss

D. Medium sized units

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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

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The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

A. Natural draught

B. Induced draught

C. Forced draught

D. Balanced draught

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The overall efficiency of thermal power plant is

A. Boiler efficiency, turbine efficiency, generator efficiency

B. All the three above plus gas cycle efficiency

C. Carnot cycle efficiency

D. Regenerative cycle efficiency

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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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Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

A. 421 kg.m

B. 421 kg.m

C. 539 kg.m

D. 102 kg.m

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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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In water 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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The Locomotive boiler has

A. 137 fire tubes and 44 superheated tubes

B. 147 fire tubes and 34 superheated tubes

C. 157 fire tubes and 24 superheated tubes

D. 167 fire tubes and 14 superheated tubes

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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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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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Reheating of steam in a turbine

A. Increases the workdone through the turbine

B. Increases the efficiency of the turbine

C. Reduces wear on the blades

D. All of these

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Lancashire boiler has __________ internal flue tubes.

A. One

B. Two

C. Three

D. Four

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For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

A. Equal to

B. Twice

C. Three times

D. Four times

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Maximum energy loss in a boiler occurs due to

A. Unburnt carbon in ash

B. Incomplete combustion

C. Ash content

D. Flue gases

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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 draught produced by a steam jet issuing from a nozzle placed in the chimney is called

A. Induced steam jet draught

B. Chimney draught

C. Forced steam jet draught

D. None of these

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In accelerated 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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An air preheater is installed

A. Before the economiser

B. Before the superheater

C. Between the economiser and chimney

D. None of these

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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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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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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 basic purpose of drum in boiler is to

A. Serve as storage of steam

B. Serve as storage of feed water for water wall

C. Remove salts from water

D. Separate steam from water

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Blading efficiency is also known as

A. Stage efficiency

B. Diagram efficiency

C. Nozzle efficiency

D. None of these

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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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The critical pressure ratio for initially dry saturated steam is

A. 0.546

B. 0.577

C. 0.582

D. 0.601

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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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Stage efficiency is also known as

A. Diagram efficiency

B. Nozzle efficiency

C. Gross efficiency

D. None of these

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Accepted Answer

A. Cylinder feed indicated mass of steam

The missing quantity per stroke is equal to

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

Hard coke is produced by carburisation of coal at

The draught may be produced by a

Pulverised fuel is used for

In locomotive boiler, maximum steam pressure is limited to

The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

The overall efficiency of thermal power plant is

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

Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

Boiler parameters are expressed by

In water tube boilers

The Locomotive boiler has

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

De-Laval turbine is a

Reheating of steam in a turbine

Lancashire boiler has __________ internal flue tubes.

For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Maximum energy loss in a boiler occurs due to

The cylindrical shell of a Lancashire boiler has diameter from

The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

In accelerated circulation type boiler

An air preheater is installed

The temperature of flue gases at air heater outlet should be

Incomplete combustion can be best judged by

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 basic purpose of drum in boiler is to

Blading efficiency is also known as

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

The critical pressure ratio for initially dry saturated steam is

A stage, in reaction turbine, is represented by

Stage efficiency is also known as

Also checkout

The missing quantity per stroke is equal to

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

Hard coke is produced by carburisation of coal at

The draught may be produced by a

Pulverised fuel is used for

In locomotive boiler, maximum steam pressure is limited to

The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

The overall efficiency of thermal power plant is

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

Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

Boiler parameters are expressed by

In water tube boilers

The Locomotive boiler has

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

De-Laval turbine is a

Reheating of steam in a turbine

Lancashire boiler has __________ internal flue tubes.

For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Maximum energy loss in a boiler occurs due to

The cylindrical shell of a Lancashire boiler has diameter from

The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

In accelerated circulation type boiler

An air preheater is installed

The temperature of flue gases at air heater outlet should be

Incomplete combustion can be best judged by

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 basic purpose of drum in boiler is to

Blading efficiency is also known as

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

The critical pressure ratio for initially dry saturated steam is

A stage, in reaction turbine, is represented by

Stage efficiency is also known as

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)