Maintain the speed of the turbine
Reduce the effective heat drop
Reheat the steam and improve its quality
Completely balance against end thrust
A. Maintain the speed of the turbine
Former is fire tube type and latter is water tube type boiler
Former is water tube type and latter is fire tube type
Former contains one fire tube and latter contains two fire tubes
None/of the above
Convection
Radiation
Conduction
Radiation and conduction
To reduce the ratio of expansion in each cylinder
To reduce the length of stroke
To reduce the temperature range in each cylinder
All of the above
Economiser
Superheater
Both (A) and (B)
None of these
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
One-fourth
One-third
Two-fifth
Three-fifth
Horizontal multi-tubular water tube boiler
Water wall enclosed furnace type
Vertical tubular fire tube type
Horizontal multi-tubular fire tube type
Decrease the mass flow rate and to increase the wetness of steam
Increase the mass flow rate and to increase the exit temperature
Decrease the mass flow rate and to decrease the wetness of steam
Increase the exit temperature without any effect on mass flow rate
0°C
100°C
Saturation temperature at given pressure
Room temperature
Pressure only
Temperature only
Dryness fraction only
Pressure and dryness fraction
Have common piston rod
Are set at 90°
Have separate piston rods
Are set in V-arrangement
Have common piston rod
Are set at 90°
Have separate piston rods
Are set in V-arrangement
To convert reciprocating motion of the piston into rotary motion
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To prevent fluctuation of speed
To keep the engine speed uniform at all load conditions
ηS = ηB × ηN
ηS = ηB / ηN
ηS = ηN / ηB
None of these
Increase thermal efficiency of boiler
Economise on fuel
Extract heat from the exhaust flue gases
Increase flue gas temperature
Increases evaporative capacity of the boiler
Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of the above
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
Lancashire boiler
Babcock and Wilcox boiler
Yarrow boiler
None of these
Regeneration
Reheating of steam
Both (A) and (B)
Cooling of steam
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
539 kcal/ kg
539 BTU/ lb
427 kcal/ kg
100 kcal/ kg
0.5 to 10 MN/m²
1 to 15 MN/m²
2.5 to 15 MN/m²
3.5 to 20 MN/m²
Simple impulse turbine
Simple reaction turbine
Impulse-reaction turbine
None of these
Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
Boiler efficiency
None of these
Moisture in fuel
Dry flue gases
Steam formation
Unburnt carbon
No drum
One drum
Two drums
Three drums
Inherent moisture and surface moisture are different things
In some coals moisture may be present up to 40%
Some moisture in coal helps in better burning which is not possible with completely dry coal
It increases thermal efficiency
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
Increases
Decreases
Has no effect on
None of these
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency