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4

Locomotive type' boiler is

A. Horizontal multi-tubular water tube boiler

B. Water wall enclosed furnace type

C. Vertical tubular fire tube type

D. Horizontal multi-tubular fire tube type

Correct Answer :

D. Horizontal multi-tubular fire tube type


Related Questions

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4

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

A. Increases

B. Decreases

C. Remain same

D. None of these

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The velocity of steam at throat of the nozzle is __________ the velocity of sound.

A. Equal to

B. Less than

C. More than

D. None of these

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4

The high pressure and low pressure cylinders in a Tandem 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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4

Which of the following varieties of coals is mostly used in steam boilers?

A. Non-coking bituminous coal

B. Brown coal

C. Peat

D. None of the above

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4

Boiler stays are used to

A. Prevent flat surfaces under pressure from tearing apart

B. Take care of failure in shear

C. Take care of failure in compression

D. Provide support for boiler

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4

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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4

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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4

In a receiver type compound engine, the high pressure and low pressure cylinders

A. Have common piston rod

B. Are set at 90°

C. Have separate piston rods

D. Are set in V-arrangement

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4

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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4

The length of shell of a Locomotive boiler is

A. 1 m

B. 2 m

C. 3 m

D. 4 m

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4

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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4

Which of the following statement is correct for a compound steam engine?

A. The cost of the engine, for the same power and economy, is more than that of a simple steam engine.

B. The forces in the working parts are increased as the forces are distributed over more parts.

C. The ratio of expansion is reduced, thus reducing the length of stroke.

D. The temperature range per cylinder is increased, with corresponding increase in condensation.

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4

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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4

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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4

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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For water, at pressures below atmospheric;

A. Melting point rises slightly and boiling point drops markedly

B. Melting point rises markedly and boiling point drops markedly

C. Melting point drops slightly and boiling point drops markedly

D. Melting point drops slightly and boiling point drops slightly

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4

The economiser is used in boilers to

A. Increase thermal efficiency of boiler

B. Economise on fuel

C. Extract heat from the exhaust flue gases

D. Increase flue gas temperature

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4

In a throttling process

A. Heat transfer takes place

B. Work is done by the expanding steam

C. Internal energy of steam changes

D. None of the above

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4

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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Which of the following substance will have same percentage in both proximate and ultimate analysis?

A. Ash

B. Volatile matter

C. Moisture

D. Hydrogen

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4

Fire tube boilers are limited to a maximum working pressure of

A. 0.17 MN/m²

B. 1.7 MN/m²

C. 17 MN/m²

D. 170 MN/m²

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4

Which of the following is a fire tube boiler?

A. Lancashire boiler

B. Babcock and Wilcox boiler

C. Yarrow boiler

D. None of these

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4

The equivalent evaporation is defined as

A. The ratio of heat actually used in producing the steam to the heat liberated in the furnace

B. The amount of water evaporated or steam produced in kg per kg of fuel burnt

C. The amount of water evaporated from and at 100°C into dry and saturated steam

D. The evaporation of 15.653 kg of water per hour from and at 100°C

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4

If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

A. ps - pa

B. pa - ps

C. pa + ps

D. None of these

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4

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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4

The pressure of reheat steam after passing through reheater compared to inlet condition is

A. More

B. Less

C. Equal

D. May be more or less depending on capacity of reheater

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4

Pulverised fuel is used for

A. Better burning

B. More calorific value

C. Less radiation loss

D. Medium sized units

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The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure)

A. p₁. p₂

B. p₁/p₂

C. p₂/p₁

D. p₁ + p₂

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4

Which of the following is steam dial?

A. Non-coking bituminous coal

B. Brown coal

C. Pulverised coal

D. Coking bituminous coal

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The fire tubes in a Cochran boiler are

A. Horizontal

B. Vertical

C. Inclined

D. None of these