Mean diameter and thickness
Inside diameter and thickness
Outside diameter and thickness
Outside diameter and inside diameter
C. Outside diameter and thickness
Drooping characteristic
Linear characteristic
Rising characteristic
Flat characteristic
One fourth
Half
One
Two
Minimum
Maximum
Zero
None of these
p₁. p₂
p₁/p₂
p₂/p₁
p₁ + p₂
Infinitely long
Around 200 meters
Equal to the height of the hot gas column producing draught
Outside temperature is very low
Same value
Higher value
Lower value
Lower/higher depending on steam flow
Horizontal
Vertical
Inclined
None of these
Economiser
Fusible plug
Superheater
Stop valve
0.1 to 0.2 kg
0.2 to 0.4 kg
0.6 to 0.8 kg
1.0 to 1.5 kg
To determine the generating capacity of the boiler
To determine the thermal efficiency of the boiler when working at a definite pressure
To prepare heat balance sheet for the boiler
All of the above
Swept volume to the volume at cut-off
Clearance volume to the swept volume
Volume at cut-off to the swept volume
Swept volume to the clearance volume
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
None of the above
Water passes through the tubes which are surrounded by flames and hot gases
The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
None of these
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
56 %
63 %
74 %
78 %
It increases the thermodynamic efficiency of the turbine
Boiler is supplied with hot water
It decreases the power developed by the turbine
All of the above
Heat energy of steam into kinetic energy
Kinetic energy into heat energy of steam
Heat energy of steam into potential energy
Potential energy into heat energy of steam
Side by side and each cylinder has common piston, connecting rod and crank
Side by side and each cylinder has separate piston, connecting rod and crank
At 90° and each cylinder has common piston, connecting rod and crank
At 90° and each cylinder has separate piston, connecting rod and crank
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Brake thermal efficiency
Atmospheric pressure
5 kg/cm²
10 kg/cm²
7580 kg/cm²
Increases
Decreases
Remains constant
None of these
Mechanical fan
Chimney
A steam jet
All of these
10 atmospheres
20 atmospheres
30 atmospheres
40 atmospheres
Reduce speed of rotor
Improve efficiency
Reduce exit losses
All of these
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Air delivered by forced draft fan
Same
Less
More
None of these
Has high heating value
Retards electric precipitation
Promotes complete combustion
Has highly corrosive effect
Pressure only
Temperature only
Dryness fraction only
Pressure and dryness fraction
Babcock and Wilcox
Locomotive
Lancashire
Cochran