0.18 MN/m²
1.8 MN/m²
18 MN/m²
180 MN/m²
B. 1.8 MN/m²
Increases the mean effective pressure
Increases the workdone
Decreases the efficiency of the engine
All of these
ηS = ηB × ηN
ηS = ηB / ηN
ηS = ηN / ηB
None of these
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Brake thermal efficiency
No heat drop in moving blades
No heat drop in fixed blades
Maximum heat drop in moving blades
Maximum heat drop in fixed blades
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
Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency
Carnot cycle efficiency
Regenerative cycle efficiency
Non-coking bituminous coal
Brown coal
Peat
None of the above
To give maximum space and strength
To withstand the pressure of steam inside the boiler
Both (A) and (B)
None of the above
Stage efficiency
Diagram efficiency
Nozzle efficiency
None of these
A horizontal steam engine requires less floor area than a vertical steam engine
The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure
The compound steam engines are generally non-condensing steam engines
All of the above
Equal to the velocity of sound
Less than the velocity of sound
More than the velocity of sound
None of these
pa = pm/K
pa = pm × K
pa = K/pm
pa = pm + K
Regulate flow of boiler water
Check level of water in boiler drum
Recirculate unwanted feed water
Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Single tube, horizontal, internally fired and stationary boiler
Single tube, vertical, externally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Multi-tubular, horizontal, externally fired and stationary boiler
Increases
Decreases
Remain unaffected
First increases and then decreases
Zero
One
Two
Four
2 to 4.5 m
3 to 5 m
5 to 7.5 m
7 to 9 m
100 bar
150 bar
200 bar
250 bar
Increases evaporative capacity of the boiler
Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of the above
Direction of steam flow
Number of stages
Mode of steam action
All of these
To guide motion of the piston rod and to prevent it from bending
To transfer motion from the piston to the cross head
To convert heat energy of the steam into mechanical work
To exhaust steam from the cylinder at proper moment
Hygroscopic substances
Water vapour in air
Temperature of air
Pressure of air
Temperature, time, and turbulence
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature
Total air, time, and temperature
Superheater
Air-preheater
Economiser
Injector
Zero
Minimum
Maximum
None of these
Horizontal
Vertical
Inclined
Horizontal and inclined
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
High pressure and a low velocity
High pressure and a high velocity
Low pressure and a low velocity
Low pressure and a high velocity
Drooping characteristic
Linear characteristic
Rising characteristic
Flat characteristic
180° to each other
90° to each other
0° to each other
None of these