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4

A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

A. Supplied by same manufacturer loose and assembled at site

B. Supplied mounted on a single base

C. Purchased from several parties and packed together at site

D. Packaged boiler does not exist

Correct Answer :

B. Supplied mounted on a single base


Related Questions

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4

Ultimate analysis of fuel is determination of percentage of

A. Carbon, hydrogen, nitrogen, sulphur, moisture

B. Fixed carbon, ash, volatile matter, moisture

C. Higher calorific value

D. Lower calorific value

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4

The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is

A. Less

B. More

C. Equal

D. May be less or more depending on temperature

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4

In a single acting steam engine

A. The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft

B. The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft

C. The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft

D. The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft

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4

The diameter of flue tube in a Cornish boiler is _________ that of the shell.

A. One-fourth

B. One-third

C. Two-fifth

D. Three-fifth

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4

The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

A. Equal to

B. Less than

C. Higher than

D. None of these

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4

Sulphur in coal results in

A. Corroding air heaters

B. Spontaneous combustion during coal storage

C. Facilitating ash precipitation

D. All of the above

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4

The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop

A. Remains the same

B. Increases

C. Decreases

D. Is unpredictable

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4

The diameter of internal flue tubes in a Lancashire boiler compared to its shell is

A. One-half

B. One-third

C. Two-fourth

D. Two-fifth

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4

The best suited coal for chain or travelling grate stoker boiler is

A. Coking coal

B. Non-coking or free burning coal

C. Pulverised coal

D. High sulphur coal

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4

A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

A. 1.05

B. 2.86

C. 6.65

D. 10.05

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4

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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4

Which of the following statement is correct?

A. A horizontal steam engine requires less floor area than a vertical steam engine

B. The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure

C. The compound steam engines are generally non-condensing steam engines

D. All of the above

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4

The draught may be produced by a

A. Mechanical fan

B. Chimney

C. A steam jet

D. All of these

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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 shell diameter and length of locomotive boiler are

A. 1.5 m, 4 m

B. 1.5 m, 6 m

C. 1 m, 4 m

D. 2 m, 4 m

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4

One kilowatt-hour energy is equivalent to

A. 1000 J

B. 360 kJ

C. 3600 kJ

D. 3600 kW/sec

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4

The dry saturated steam at very low pressure, (510 kg/cm²) when throttled to atmosphere will become

A. Wet

B. Superheated

C. Remain dry saturated

D. Dry

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4

The actual power generated in the engine cylinder is called

A. Indicated power

B. Brake power

C. Frictional power

D. None of these

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4

Which of the following coals has the highest calorific value?

A. Anthracite coal

B. Bituminous coal

C. Lignite

D. Peat

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4

Which of the following statement is wrong?

A. The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.

B. The flow in the convergent portion of the nozzle is subsonic.

C. The flow in the divergent portion of the nozzle is supersonic.

D. To increase the velocity of steam above sonic velocity (supersonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.

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4

Which of the following boiler works on a forced circulation of water?

A. Lamont boiler

B. Benson boiler

C. Loeffler boiler

D. All of these

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4

A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

A. Supplied by same manufacturer loose and assembled at site

B. Supplied mounted on a single base

C. Purchased from several parties and packed together at site

D. Packaged boiler does not exist

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4

The fittings mounted on the boiler for its proper and safe functioning is a

A. Water level indicator

B. Pressure gauge

C. Safety valve

D. All of these

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4

Multi-stage steam turbines are of the

A. Velocity compounded type

B. Reaction type

C. Pressure compounded type

D. All of these

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4

1 kg.m is equal to

A. 9.81 Joules

B. 102 Joules

C. 427 Joules

D. None of these

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4

The numbers of fire tubes in a Cochran boiler are

A. 75

B. 115

C. 165

D. 225

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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

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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4

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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4

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

A. Bismuth

B. Copper

C. Aluminium

D. Nickel