4.75 mm
5.47 mm
7.45 mm
47.5 mm
D. 47.5 mm
Increases expansion ratio of steam
Reduces back pressure of steam
Reduces temperature of exhaust steam
All of these
Natural draught
Induced draught
Forced draught
Balanced draught
A horizontal steam engine requires less floor area than a vertical steam engine
The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure
The compound steam engines are generally non-condensing steam engines
All of the above
180° to each other
90° to each other
0° to each other
None of these
Volume of intake steam
Pressure of intake steam
Temperature of intake steam
All of these
Convection
Radiation
Conduction
Radiation and conduction
In the drum
In the fire tubes
Above steam dome
Over the combustion chamber
Induced draft fan
Smoke meter
Chimney
Precipitator
There is a pressure drop in the nozzle
Fluid flows through the nozzle
Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
The given boiler with the model
The two different boilers of the same make
Two different makes of boilers operating under the same operating conditions
Any type of boilers operating under any conditions
Evaporative capacity
Factor of evaporation
Equivalent evaporation
One boiler h.p.
Moisture in fuel
Dry flue gases
Steam formation
Unburnt carbon
Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
Feed pump is employed to supplement natural circulation in water wall type furnace
Water is converted into steam in one pass without any recirculation
Feed pump
Injector
Feed check valve
Pressure gauge
Straight
Circular
Curved
None of these
2 cm
6 cm
8 cm
12 cm
Does not change
Increases
Decreases
None of these
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Longitudinally
Circumferentially
On dished end
Anywhere
Locomotive boiler
Babcock and Wilcox boiler
Stirling boiler
All of the above
Heated sufficiently
Burnt in excess air
Heated to its ignition point
Burnt as powder
Stage efficiency
Diagram efficiency
Nozzle efficiency
None of these
Lamont boiler
Benson boiler
Loeffler boiler
All of these
Carbon, hydrogen, nitrogen, sulphur, moisture
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Lower calorific value
One
Two
One steam drum and one water drum
No drum
Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
Increase the temperature of saturated steam without raising its pressure
100 kg/cm² and 540°C
1 kg/cm² and 100°C
218 kg/cm² abs and 373°C
218 kg/cm² abs and 540°C
Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency
Carnot cycle efficiency
Regenerative cycle efficiency
3.3 bar
5.46 bar
8.2 bar
9.9 bar
2 to 4.5 m
3 to 5 m
5 to 7.5 m
7 to 9 m