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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A safety valve mainly used with locomotive and marine boilers is

High steam and low water safety valve
Spring loaded safety valve
Lever safety valve
Dead weight safety valve

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Steam Boilers, Engines, Nozzles and Turbines
Relative percentage of heat absorbed through the heat transfer of (i) Furnace water wall (ii) Boiler tank (iii) Superheater (iv) Economizer (v) Air-heater of a typical boiler of 200 MW capacity would be of the order of

7 : 15 : 20 : 10 : 48
48 : 20 : 15 : 7 : 10
20 : 48 : 7 : 15 : 10
10 : 7 : 15 : 20 : 48

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler are

Inclined
Horizontal
Vertical
None of these

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Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

Over-damping
None of these
Choked
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
The latent heat of steam with increase of pressure

Decreases
Behaves unpredictably
Remain same
Increases

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Steam Boilers, Engines, Nozzles and Turbines
An ideal regenerative cycle is

Less than Carnot cycle
Equal to Carnot cycle
More than Carnot cycle
Could be anything

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