α₁ = α₂ and β₁ = β₂
α₁ = β₁ and α₂= β₂
α₁ < β₁ and α₂ > β₂
α₁ = β₂ and β₁ = α₂
B. α₁ = β₁ and α₂= β₂
Can be raised rapidly
Is raised at slower rate
Is raised at same rate
Could be raised at fast/slow rate depending on design
Equal to
Less than
More than
None of these
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Brake thermal efficiency
Bleeding
Reheating
Governing
None of these
1 to 2 m
1.25 to 2.25 m
1.5 to 2.5 m
1.75 to 2.75 m
Prevent flat surfaces under pressure from tearing apart
Take care of failure in shear
Take care of failure in compression
Provide support for boiler
Equal to
Less than
More than
None of these
Absolute velocity at the inlet of moving blade is equal to that at the outlet
Relative velocity at the inlet of the moving blade is equal to that at the outlet
Axial velocity at inlet is equal to that at the outlet
Whirl velocity at inlet is equal to that at the outlet
Heat carried away by flue gases
Heat carried away by ash
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
All of the above
Remains the same
Increases
Decreases
Is unpredictable
Last superheater or reheater and air preheater
Induced draft fan and forced draft fan
Air preheater and chimney
None of the above
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
Surface condenser
Jet condenser
Barometric condenser
Evaporative condenser
Condenser
Condensate pump
Air extraction pump
All of these
Give maximum space
Give maximum strength
Withstand pressure inside boiler
Resist intense heat in fire box
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
Equal
Less
More
None of these
2 cm
6 cm
8 cm
12 cm
225.65 kgf/ cm²
273 kgf/ cm²
100 kgf/ cm²
1 kgf/ cm²
One-fourth
One-third
Two-fifth
Three-fifth
V = 2g H'
V = 2g/H'
V = H'/2g
V = 2gH'
0.546
0.577
0.582
0.601
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
None of the above
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
Low
Very low
High
Very high
Area of nozzle at throat
Initial pressure and volume of steam
Final pressure of steam leaving the nozzle
Both (A) and (B)
Longitudinally
Circumferentially
On dished end
Anywhere
Increases the mean effective pressure
Increases the workdone
Decreases the efficiency of the engine
All of these
Corroding air heaters
Spontaneous combustion during coal storage
Facilitating ash precipitation
All of the above
21 %
23 %
30 %
40 %