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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The specific heat of superheated steam in kcal/kg is generally of the order of

0.5
0.3
0.8
0.1

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Steam Boilers, Engines, Nozzles and Turbines
Feed water conditioning in thermal power plants in done to

Increase efficiency of thermal power plant
Increase steam parameters
Increase heat transfer rate
Reduce hardness and for removal of solids

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Steam Boilers, Engines, Nozzles and Turbines
The major axis of elliptical manholes on the shell should be provided

Longitudinally
Anywhere
Circumferentially
On dished end

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

50°C and 1.1 bar pressure
100°C and 1.1 bar pressure
50°C and normal atmospheric pressure
100°C and normal atmospheric pressure

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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

Under-damping
None of these
Over-damping
Choked

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Steam Boilers, Engines, Nozzles and Turbines
A safety valve usually employed with stationary boilers is

Lever safety valve
Dead weight safety valve
High steam and low water safety valve
All of the listed here

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