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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The natural draught is produced by

Steam jet
Chimney
Centrifugal fan
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

None of these
Over-damping
Under-damping
Choked

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive type' boiler is

Vertical tubular fire tube type
Horizontal multi-tubular water tube boiler
Horizontal multi-tubular fire tube type
Water wall enclosed furnace type

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Steam Boilers, Engines, Nozzles and Turbines
The behavior of coal in a furnace is determined by

The proximate analysis
The content of ash and heating value
The exact analysis
The content of sulphur

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

pa = pm/K
pa = pm + K
pa = K/pm
pa = pm × K

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Steam Boilers, Engines, Nozzles and Turbines
Sulphur in coal results in

Corroding air heaters
Facilitating ash precipitation
All of these
Spontaneous combustion during coal storage

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