Atmospheric temperature
500-600°C
700-850°C
950-1100°C
D. 950-1100°C
1 m
1.5 m
2 m
2.5 m
Latent heat is zero
Liquid directly becomes steam
Specific volume of steam and liquid is same
This is the maximum pressure limit
180° to each other
90° to each other
0° to each other
None of these
Initial conditions of steam
Back pressure
Initial pressure of steam
All of these
Drooping characteristic
Linear characteristic
Rising characteristic
Flat characteristic
Avoid excessive build up of pressure
Avoid explosion
Extinguish fire if water level in the boiler falls below alarming limit
Control steam dome
Atmospheric pressure
5 kg/cm²
10 kg/cm²
7580 kg/cm²
Isothermal process
Isentropic process
Throttling process
Free expansion process
Pressure alone
Temperature alone
Pressure and temperature
Pressure and dryness fraction
More
Less
Equal
None of these
Lancashire boiler is a fire tube boiler.
Fire tube boilers are internally fired.
Babcock and Wilcox boiler is a water tube boiler.
All of the above
Wet steam
Dry saturated steam
Superheated steam
None of these
Remain same
Increases
Decreases
Behaves unpredictably
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency
0.18 MN/m²
1.8 MN/m²
18 MN/m²
180 MN/m²
Have common piston rod
Are set at 90°
Have separate piston rod
Are set in V-arrangement
Ratio of thermal efficiency to Rankine efficiency
Ratio of brake power to the indicated power
Ratio of heat equivalent to indicated power to the energy supplied in steam
Product of thermal efficiency and Rankine efficiency
Stage efficiency
Diagram efficiency
Nozzle efficiency
None of these
Mechanical fan
Chimney
A steam jet
All of these
Water space also
Chimney
Steam space
Superheater
Direction of steam flow
Number of stages
Mode of steam action
All of these
More heating surface
Less heating surface
Equal heating surface
Heating surface depends on other parameters
Simple impulse turbine
Simple reaction turbine
Impulse-reaction turbine
None of these
Same as
2 times
4 times
8 times
Increases
Decreases
Has no effect on
None of these
Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
Boiler efficiency
None of these
Below atmospheric pressure
1 kg/cm²
100 kg/cm²
225.6 kg/cm²
40 percent
50 percent
60 percent
70 percent
Minimum
Maximum
Zero
None of these
And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²
And its corresponding conversion into dry steam at desired boiler pressure
Conversion into steam at atmospheric condition
Conversion into steam at the same pressure at which feed water is supplied