One-half the height of chimney
Equal to the height of chimney
Two times the height of chimney
Four times the height of chimney
B. Equal to the height of chimney
Flue gases pass through tubes and water around it
Water passes through the tubes and flue gases around it
Work is done during adiabatic expansion
Change in enthalpy
Natural draught
Induced draught
Forced draught
Balanced draught
More
Less
Equal
None of these
Entropy
Enthalpy
Pressure
Temperature
Longitudinally
Circumferentially
On dished end
Anywhere
Internally fired
Externally fired
Internally as well as externally fired
None of these
Convection
Radiation
Conduction
Radiation and conduction
(p₂/p₁) = [2/(n - 1)] n/(n + 1)
(p₂/p₁) = [2/(n + 1)] n/(n-1)
(p₂/p₁) = [(n - 1)/2] n + (1/n)
(p₂/p₁) = [(n + 1)/2] n - (1/n)
1.5 m, 4 m
1.5 m, 6 m
1 m, 4 m
2 m, 4 m
Less
More
Equal
May be less or more depending on temperature
Static
Dynamic
Static and dynamic
Neither static nor dynamic
Internally fired
Externally fired
Internally as well as externally fired
None of these
There is a pressure drop in the nozzle
Fluid flows through the nozzle
Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
Regeneration
Reheating of steam
Both (A) and (B)
Cooling of steam
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Give maximum space
Give maximum strength
Withstand pressure inside boiler
Resist intense heat in fire box
To give maximum space and strength
To withstand the pressure of steam inside the boiler
Both (A) and (B)
None of the above
0.17 MN/m²
1.7 MN/m²
17 MN/m²
170 MN/m²
Remains the same
Increases
Decreases
Is unpredictable
100 tonnes/h
135 tonnes/h
175 tonnes/h
250 tonnes/h
T1 /88.25H
88.25H/T1
T1 /176.5H
176.5H/T1
Lowers the boiling point of a liquid
Raises the boiling point of a liquid
Does not affects the boiling point of a liquid
Reduces its volume
21 %
23 %
30 %
40 %
Increases
Decreases
Remain unaffected
First increases and then decreases
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
Has high heating value
Retards electric precipitation
Promotes complete combustion
Has highly corrosive effect
Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency
Carnot cycle efficiency
Regenerative cycle efficiency
Area of the actual indicator diagram to the area of theoretical indicator diagram
Actual workdone per stroke to the theoretical workdone per stroke
Actual mean effective pressure to the theoretical mean effective pressure
Any one of the above
56 %
63 %
74 %
78 %