Inlet and throat
Inlet and outlet
Throat and exit
All of these
C. Throat and exit
Atmospheric temperature
500-600°C
700-850°C
950-1100°C
Mean diameter and thickness
Inside diameter and thickness
Outside diameter and thickness
Outside diameter and inside diameter
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency
Less efficient and less economical
Less efficient and more economical
More efficient and less economical
More efficient and more economical
0.546
0.577
0.582
0.601
Wholly in blades
Wholly in nozzle
Partly in the nozzle and partly in blades
None of these
150 kg/h
210 kg/h
280 kg/h
340 kg/h
Vertical fire tube type
Horizontal fire tube type
Horizontal water tube type
Forced circulation type
Drooping characteristic
Linear characteristic
Rising characteristic
Flat characteristic
Equal to
Less than
More than
None of these
0.4
0.56
0.67
1.67
Where low speeds are required
For small power purposes and low speeds
For large power purposes
For small power purposes and high speeds
Diverge from left to right
Diverge from right to left
Are equally spaced throughout
First rise up and then fall
Maximum
Minimum
Zero
Depends on temperature also
Equivalent evaporation
Factor of evaporation
Boiler efficiency
Power of a boiler
Equal
Less
More
None of these
Reduce speed of rotor
Improve efficiency
Reduce exit losses
All of these
0.1
0.3
0.5
0.8
Indicated power
Brake power
Frictional power
None of these
Increases
Decreases
Remain unaffected
First increases and then decreases
Maintain the speed of the turbine
Reduce the effective heat drop
Reheat the steam and improve its quality
Completely balance against end thrust
Horizontal
Vertical
Inclined
Both horizontal and vertical
Increases
Decreases
Remain constant
May increase or decrease depending upon the method of storage
78-81 %
81-85 %
85-90 %
90-95 %
0°C
40°C
60°C
100°C
When the cross-section of the nozzle increases continuously from entrance to exit
When the cross-section of the nozzle decreases continuously from entrance to exit
When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
None of the above
The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
The flow in the convergent portion of the nozzle is subsonic.
The flow in the divergent portion of the nozzle is supersonic.
To increase the velocity of steam above sonic velocity (supersonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.
Velocity increases
Velocity decreases
Velocity remains constant
Pressure remains constant
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
The steam is expanded in nozzles only and there is a pressure drop and heat drop
The steam is expanded both in fixed and moving blades continuously
The steam is expanded in moving blades only
The pressure and temperature of steam remains constant