In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

0.56

0.74

0.63

0.78

0.56

0.74

0.63

0.78

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Steam Boilers, Engines, Nozzles and Turbines
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

Water level indicator

Fusible plug

Safety valve

Pressure gauge

Water level indicator

Fusible plug

Safety valve

Pressure gauge

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Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

25 to 40%

40 to 60%

10 to 15%

15 to 25%

25 to 40%

40 to 60%

10 to 15%

15 to 25%

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

Increase steam pressure

Superheat the steam

All of the listed here

Reduce fuel consumption

Increase steam pressure

Superheat the steam

All of the listed here

Reduce fuel consumption

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Steam Boilers, Engines, Nozzles and Turbines
In an impulse reaction turbine, the pressure drops gradually and continuously over

Moving blades

None of these

Fixed blades

Both fixed and moving blades

Moving blades

None of these

Fixed blades

Both fixed and moving blades

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Steam Boilers, Engines, Nozzles and Turbines
In a Woolf type compound engine, the high pressure and low pressure cylinders

Are set at 90°

Have separate piston rod

Have common piston rod

Are set in V arrangement

Are set at 90°

Have separate piston rod

Have common piston rod

Are set in V arrangement

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

Steam Boilers, Engines, Nozzles and Turbines The friction present between the steam and the nozzle surfaces reduces the heat drop by

Steam Boilers, Engines, Nozzles and Turbines An economiser is installed in a boiler primarily to

Steam Boilers, Engines, Nozzles and Turbines In an impulse reaction turbine, the pressure drops gradually and continuously over

Steam Boilers, Engines, Nozzles and Turbines In a Woolf type compound engine, the high pressure and low pressure cylinders

Steam Boilers, Engines, Nozzles and Turbines
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

Steam Boilers, Engines, Nozzles and Turbines
In an impulse reaction turbine, the pressure drops gradually and continuously over

Steam Boilers, Engines, Nozzles and Turbines
In a Woolf type compound engine, the high pressure and low pressure cylinders