6.25 mm
62.5 mm
72.5 mm
92.5 mm
B. 62.5 mm
160/3 m/s
320/3 m/s
640/3 m/s
640 m/s
Stationary fire tube boiler
Internally fired boiler
Horizontal boiler
All of these
Number of casing
Number of entries of steam
Number of exits of steam
Each row of blades
To guide motion of the piston rod and to prevent it from bending
To transfer motion from the piston to the crosshead
To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
None of these
47.5 mm, 130 mm
32.5 mm, 180 mm
65.5 mm, 210 mm
24.5 mm, 65 mm
Enthalpy
Superheating
Super saturation
Latent heat
Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these
Increases evaporative capacity of the boiler
Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of the above
Regeneration
Reheating of steam
Both (A) and (B)
Cooling of steam
Remains the same
Increases
Decreases
Is unpredictable
There is no pressure drop due to condensation
Steam is admitted at boiler pressure and exhausted at condenser pressure
The expansion (or compression) of the steam is hyperbolic
All of the above
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
1 m
2 m
3 m
4 m
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
None of these
Blading efficiency
Nozzle efficiency
Gross or stage efficiency
Mechanical efficiency
Pressure only
Temperature only
Dryness fraction only
Pressure and dryness fraction
Constant volume
Constant temperature
Constant pressure
Constant entropy
Higher calorific value at constant volume
Lower calorific value at constant volume
Higher calorific value at constant pressure
Lower calorific value at constant pressure
From a metal wall from one medium to another
From heating an intermediate material and then heating the air from this material
By direct mixing,
Heat is transferred by bleeding some gases from furnace
9.81 Joules
102 Joules
427 Joules
None of these
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Cool the scanners
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone.
Wet
Superheated
Remain dry saturated
Dry
All the fuel burns instantaneously producing high energy release
Fuel burns with less air
Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal
Explosion in furnace
Pulverising coal in inert atmosphere
Heating wood in a limited supply of air at temperatures below 300°C
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Binding the pulverised coal into briquettes
Tonnes/hr. of steam
Pressure of steam in kg/cm²
Temperature of steam in °C
All of the above
Increase thermal efficiency of boiler
Economise on fuel
Extract heat from the exhaust flue gases
Increase flue gas temperature
0.2
0.8
1.0
0.6
Does not change
Increases
Decreases
None of these
To provide reciprocating motion to the slide valve
To convert reciprocating motion of the piston into rotary motion of the crank
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To provide simple harmonic motion to the D-slide valve
Feed pump
Injector
Feed check valve
Pressure gauge