Lancashire boiler is of

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Lancashire boiler is of

A. Stationary < fire tube type

B. Horizontal type

C. Natural circulation type

D. All of the above

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The maximum heat loss is a boiler occurs due to

A. Moisture in fuel

B. Dry flue gases

C. Steam formation

D. Unburnt carbon

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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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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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In an ideal impulse turbine, the

A. Absolute velocity at the inlet of moving blade is equal to that at the outlet

B. Relative velocity at the inlet of the moving blade is equal to that at the outlet

C. Axial velocity at inlet is equal to that at the outlet

D. Whirl velocity at inlet is equal to that at the outlet

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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 velocity of whirl at outlet for an axial discharge turbine is

A. Minimum

B. Maximum

C. Zero

D. None of these

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In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

A. 56 %

B. 63 %

C. 74 %

D. 78 %

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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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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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The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

A. Blades are equiangular

B. Blade velocity coefficient is unity

C. Blades are equiangular and frictionless

D. Blade solidity is 0.65

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Fire tube boilers are limited to a maximum design working pressure of

A. 1 kg/cm

B. 6 kg/cm

C. 17 kg/cm²

D. 100 kg/cm²

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The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)

A. V = 44.72 h_d K

B. V = 44.72 K h_d

C. V = 44.72 K h_d

D. V = 44.72 K h_d

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The length of Cornish boiler is of the order of

A. 24 m

B. 35 m

C. 57.5 m

D. 79 m

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In a reaction turbine, when steam flows through the fixed 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 capacity of induced draft fan compared to forced draft fan in a boiler is

A. Same

B. More

C. Less

D. Less or more depending on size of boiler

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The fire tubes in a Scotch marine boiler are

A. Horizontal

B. Vertical

C. Inclined

D. None of these

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The flow of steam is supersonic

A. At the entrance to the nozzle

B. At the throat of the nozzle

C. In the convergent portion of the nozzle

D. In the divergent portion of the nozzle

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When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

A. Choked

B. Under-damping

C. Over-damping

D. None of these

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The length of Lancashire boiler varies from

A. 5 to 6 m

B. 6 to 7 m

C. 7.25 to 9 m

D. 9 to 10 m

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The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

A. Regenerative heating

B. Reheating of steam

C. Bleeding

D. None of these

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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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Size of boiler tubes is specified by

A. Mean diameter and thickness

B. Inside diameter and thickness

C. Outside diameter and thickness

D. Outside diameter and inside diameter

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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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The value of diagram factor depends upon

A. Initial conditions of steam

B. Back pressure

C. Initial pressure of steam

D. All of these

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The pressure of steam __________ while flowing through a nozzle.

A. Increases

B. Decreases

C. Remains constant

D. None of these

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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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Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

A. I.P. = a × m + b

B. m = a + b × I.P.

C. I.P. = b × m + a

D. m = (b/I.P.) - a

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Pour point of fuel oil is the

A. Lowest temperature at which oil will flow under set condition

B. Storage temperature

C. Temperature at which fuel is pumped through burners

D. Temperature at which oil is transported

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With increase in load, convection superheater has

A. Drooping characteristic

B. Linear characteristic

C. Rising characteristic

D. Flat characteristic

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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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Accepted Answer

D. All of the above

Lancashire boiler is of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The maximum heat loss is a boiler occurs due to

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

The difference between Cornish boiler and Lancashire boiler is that

In an ideal impulse turbine, the

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

The velocity of whirl at outlet for an axial discharge turbine is

In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

The main object of a boiler trial is

The ultimate analysis of fuel lists

The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Fire tube boilers are limited to a maximum design working pressure of

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)

The length of Cornish boiler is of the order of

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

The capacity of induced draft fan compared to forced draft fan in a boiler is

The fire tubes in a Scotch marine boiler are

The flow of steam is supersonic

When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

The length of Lancashire boiler varies from

The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

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

Size of boiler tubes is specified by

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

The value of diagram factor depends upon

The pressure of steam __________ while flowing through a nozzle.

Water boils when its vapour pressure

Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Pour point of fuel oil is the

With increase in load, convection superheater has

The performance of a boiler is measured by the

Also checkout

Lancashire boiler is of

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

The maximum heat loss is a boiler occurs due to

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

The difference between Cornish boiler and Lancashire boiler is that

In an ideal impulse turbine, the

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

The velocity of whirl at outlet for an axial discharge turbine is

In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

The main object of a boiler trial is

The ultimate analysis of fuel lists

The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Fire tube boilers are limited to a maximum design working pressure of

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

The length of Cornish boiler is of the order of

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

The capacity of induced draft fan compared to forced draft fan in a boiler is

The fire tubes in a Scotch marine boiler are

The flow of steam is supersonic

When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

The length of Lancashire boiler varies from

The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

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

Size of boiler tubes is specified by

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

The value of diagram factor depends upon

The pressure of steam __________ while flowing through a nozzle.

Water boils when its vapour pressure

Willians line follows the law (where b = A constant representing the shape of the Willians line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Pour point of fuel oil is the

With increase in load, convection superheater has

The performance of a boiler is measured by the

Also checkout

The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and h_d = Enthalpy or heat drop during expansion of steam in a nozzle)