STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

One kilowatt-hour energy is equivalent to

1000 J

3600 kJ

3600 kW/sec

360 kJ

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Purchased from several parties and packed together at site

Packaged boiler does not exist

Supplied by same manufacturer loose and assembled at site

Supplied mounted on a single base

TRUE ANSWER : ?
YOUR ANSWER : ?

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

ηS = ηB × ηN

ηS = ηN / ηB

None of the listed here

ηS = ηB / ηN

TRUE ANSWER : ?
YOUR ANSWER : ?

Water boils when its vapor pressure

Equals to atmospheric pressure

Equals that of the surroundings

Equals the pressure of water in the container

Equals 760 mm of mercury

TRUE ANSWER : ?
YOUR ANSWER : ?

While steam expands in turbines, theoretically the entropy

Remains constant

Behaves unpredictably

Decreases

Increases

TRUE ANSWER : ?
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Which of the following are boiler accessories?

Economizer

Superheater

Both (A) and (B)

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A steam nozzle converts

Kinetic energy into heat energy of steam

Heat energy of steam into potential energy

Potential energy into heat energy of steam

Heat energy of steam into kinetic energy

TRUE ANSWER : ?
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Boiler stays are used to

Prevent flat surfaces under pressure from tearing apart

Take care of failure in compression

Provide support for boiler

Take care of failure in shear

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Lancashire boiler is of

Natural circulation type

Horizontal type

All of the listed here

Stationary < fire tube type

TRUE ANSWER : ?
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An economiser is generally placed between

Induced draft fan and forced draft fan

Last superheater or reheater and air preheater

Air preheater and chimney

None of these

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YOUR ANSWER : ?