Before the economiser
Before the superheater
Between the economiser and chimney
None of these
Initial conditions of steam
Back pressure
Initial pressure of steam
All of these
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
Horizontal
Vertical
Inclined
Horizontal and inclined
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
Air present in atmosphere at NTP conditions
Air required for complete combustion of fuel with no excess air
Air required for optimum combustion so as to have reasonable excess air
Air required to convert CO into CO₂
225.65 kgf/ cm²
273 kgf/ cm²
100 kgf/ cm²
1 kgf/ cm²
Cylinder feed indicated mass of steam
Cylinder feed + indicated mass of steam
Mass of cushion steam + indicated mass of steam
Mass of cushion steam + cylinder feed
Increases
Decreases
Remains constant
None of these
Blow off cock
Fusible plug
Superheater
Stop valve
60°
90°
180°
270°
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
Feed pump
Injector
Feed check valve
Pressure gauge
Have common piston rod
Are set at 90°
Have separate piston rod
Are set in V-arrangement
One-fourth
One-third
Two-fifth
One-half
Equal to Carnot cycle
Less than Carnot cycle
More than Carnot cycle
Could be anything
Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Superheat the steam
Reduce fuel consumption
Increase steam pressure
All of these
Area of nozzle at throat
Initial pressure and volume of steam
Final pressure of steam leaving the nozzle
Both (A) and (B)
Receiver type compound engine
Tandem type compound engine
Woolf type compound engine
Both (A) and (B)
The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft
10 atmospheres
20 atmospheres
30 atmospheres
40 atmospheres
Equal
Less
More
None of these
Prevent the bulging of flat surfaces
Avoid explosion in furnace
Prevent leakage of hot flue gases
Support furnace freely from top
0.546
0.577
0.582
0.601
Better burning
More calorific value
Less radiation loss
Medium sized units
To give maximum space and strength
To withstand the pressure of steam inside the boiler
Both (A) and (B)
None of the above
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Single rotor impulse turbine
Multi-rotor impulse turbine
Impulse reaction turbine
None of these
Desirable
Economical
Essential
Uneconomical