WorksheetsSteam Power Plant: 2
Total questions: 15
Worksheet time: 8mins
The formation of gas bubbles in a liquid is called
bubbling
foaming
priming
carryover
In a condensing steam engine
condensed steam is supplied
steam condenses inside cylinder
steam condenses as soon as it leaves the cylinder
exhaust steam is condensed in a condenser
Which of the following is the pressure applied at the nozzle discharge section?
Stagnant pressure
Critical pressure
Back pressure
Atmospheric pressure
When the back pressure is reduced to lowest exit pressure, the mass flow reaches a maximum value and the flow is said to be :
Stacked
Choked
Stuck-up
Clog-up
For back pressure valves, abrupt changes in fluid properties occur in a very thin section of converging - diverging nozzle under supersonic flow conditions, creating
sound wave
tidal wave
shock wave
none of these
An inventor proposes to develop electrical power by withdrawing heat from the geyser fields of northern California and converting it all to work in power turbines. This scheme will not work because:
the geyser fields have only a limited lifetime
the salinity of the steam is too great
it violates the first law of thermodynamics
it violates the second law of thermodynamics
Measure of ability of a boiler to transfer the heat given by the furnace to the water and steam is
grate efficiency
stroke efficiency
furnace efficiency
boiler efficiency
A goose neck is installed in the line connecting a steam gauge to a boiler to:
maintain constant steam flow
protect the gauge element
prevent steam knocking
maintain steam pressure
When droplets of water are carried by steam in the boiler.
Priming
Foaming
Carryover
Embrittlement
The process in which heat energy is transferred to a thermal energy storage device is known as:
adiabatic
regeneration
intercooling
isentropic
A heat transfer device that reduces a thermodynamic fluid from its vapor phase to its liquid phase such as in vapor compression refrigeration plant or in a condensing steam power plant.
Flash vessel
Cooling tower
Condenser
Steam separator
In a steam generator with good combustion control, what occurs if the load is increased?
Air temperature leaving air heater decreases
Air temperature entering air heater increases
Furnace pressure is approximately constant
Economizer gas outlet temperature decreases
A liquid boils when its vapor pressure equals
the gage pressure
the critical pressure
the ambient pressure
one standard atmosphere
A chemical method of feedwater treatment which uses calcium hydroxide and sodium carbonate as reagents.
Thermal treatment
Lime soda treatment
Demineralization process
Ion exchange treatment
Which of the following factors does working pressure of boiler doesn’t depend?
Tensile strength of shell
Thickness of shell
Factor of safety
Type of fuel being fired
