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Steam Boilers

For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has ____________________?

Engines, Nozzles and Turbines, Steam Boilers /
For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has ____________________?

A. more heating surface
B. less heating surface
C. equal heating surface
D. heating surface depends on other parameters
E. none of the above

For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has ____________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers

The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________?

Engines, Nozzles and Turbines, Steam Boilers /
The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________?

A. increases
B. decreases
C. remains unchanged
D. increases/decreases depending on steam temperature requirements
E. unpredictable

The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers

The feed check valve is used in order to ______________________?

Engines, Nozzles and Turbines, Steam Boilers /
The feed check valve is used in order to ______________________?

A. regulate flow of boiler water
B. check level of water in boiler drum
C. recirculate unwanted feed water
D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
E. none of the above

The feed check valve is used in order to ______________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers

The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________?

Engines, Nozzles and Turbines, Steam Boilers /
The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________?

A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. first decreases and then increases

The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers

The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?

Engines, Nozzles and Turbines, Steam Boilers /
The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?

A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. unpredictable

The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers

A supercritical boiler is one that operates above the pressure and temperature of following values_____________________?

Engines, Nozzles and Turbines, Steam Boilers /
A supercritical boiler is one that operates above the pressure and temperature of following values_____________________?

A. 100 kg/cm2 and 540°C
B. 1 kg/cm2 and 100°C
C. 218 kg/cm2 abs and 373°C
D. 218 kg/cm2 abs and 540°C
E. 100 kg/cm2 abs and 373°C

A supercritical boiler is one that operates above the pressure and temperature of following values_____________________? Read More »

Engines, Nozzles and Turbines, Steam Boilers