Can be raised rapidly
Is raised at slower rate
Is raised at same rate
Could be raised at fast/slow rate depending on design
A. Can be raised rapidly
0.5 to 1 m
1 to 2 m
1.25 to 2.5 m
2 to 3 m
Decreasing initial steam pressure and temperature
Increasing exhaust pressure
Decreasing exhausts pressure
Increasing the expansion ratio
Heated sufficiently
Burnt in excess air
Heated to its ignition point
Burnt as powder
Chimney
Induced draft fan
Both combined (A) and (B)
Steam jet draught
Single tube, horizontal, internally fired and stationary boiler
Single tube, vertical, externally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Multi-tubular, horizontal, externally fired and stationary boiler
The efficiency of steam turbines is greater than steam engines
A flywheel is a must for steam turbine
The turbine blades do not change the direction of steam issuing from the nozzle
The pressure of steam, in reaction turbines, is increased in fixed blades as well as in moving blades
Internally fired
Externally fired
Internally as well as externally fired
None of these
Blow off cock
Fusible plug
Stop valve
Safety valve
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Equal
Less
More
None of these
Slow speed engine
Medium speed steam engine
High speed steam engine
None of these
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency
The ratio of heat actually used in producing the steam to the heat liberated in the furnace
The amount of water evaporated or steam produced in kg per kg of fuel burnt
The amount of water evaporated from and at 100° C into dry and saturated steam
The evaporation of 15.653 kg of water per hour from and at 100° C
Velocity of steam
Specific volume of steam
Dryness fraction of steam
All of these
The mechanical draught reduces the height of chimney.
The natural draught reduces the fuel consumption.
A balanced draught is a combination of induced and forced draught.
All of the above
Mechanical fan
Chimney
A steam jet
All of these
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
Increases
Decreases
Remain unaffected
First increases and then decreases
Lever safety valve
Dead weight safety valve
High steam and low water safety valve
Spring loaded safety valve
Carbon, hydrogen, nitrogen, sulphur, moisture
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Lower calorific value
To blow off steam when the pressure of steam inside the boiler exceeds the working pressure
To indicate the water level inside the boiler to an observer
To measure pressure of steam inside the steam boiler
None of the above
CO₂
CO
O₂
N₂
Anthracite coal
Bituminous coal
Lignite
Peat
Horizontal
Vertical
Inclined
None of these
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Brake thermal efficiency
No heat drop in moving blades
No heat drop in fixed blades
Maximum heat drop in moving blades
Maximum heat drop in fixed blades
Remain unaffected
Improve
Worsen
May improve/worsen depending on size
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
One
Two
Three
Four
Has high heating value
Retards electric precipitation
Promotes complete combustion
Has highly corrosive effect