Large marine propulsion
Electric power generation
Direct drive of fans, compressors, pumps
All of these
D. All of these
Give maximum space
Give maximum strength
Withstand pressure inside boiler
Resist intense heat in fire box
24 m
35 m
57.5 m
79 m
The draft to be created
Limitation of construction facilities
Control of pollution
Quantity of flue gases to be handled
The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
The forces in the working parts are increased as the forces are distributed over more parts.
The ratio of expansion is reduced, thus reducing the length of stroke.
The temperature range per cylinder is increased, with corresponding increase in condensation.
0.528
0.546
0.577
0.582
The given boiler with the model
The two different boilers of the same make
Two different makes of boilers operating under the same operating conditions
Any type of boilers operating under any conditions
Avoid excessive build up of pressure
Avoid explosion
Extinguish fire if water level in the boiler falls below alarming limit
Control steam dome
Heat transfer takes place across cylinder walls
Work is done
Steam may be wet, dry or superheated after expansion
All of the above
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
Water passes through the tubes which are surrounded by flames and hot gases
The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
None of these
Volume
Pressure
Entropy
Enthalpy
Regenerative heating
Reheating of steam
Bleeding
None of these
Equal to the velocity of sound
Less than the velocity of sound
More than the velocity of sound
None of these
V = 2g H'
V = 2g/H'
V = H'/2g
V = 2gH'
(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)
Corrosion
Scale
Carryover
All of the above
Induced draft fan and chimney
Induced draft fan and forced draft fan
Forced draft fan and chimney
Any one of the above
sin²α
cos²α
tan²α
cot²α
Coking coal
Non-coking or free burning coal
Pulverised coal
High sulphur coal
Boiler effectiveness
Boiler evaporative capacity
Factor of evaporation
Boiler efficiency
Wet
Superheated
Remain dry saturated
Dry
A steam turbine develops higher speeds
The efficiency of steam turbine is higher
The steam consumption is less
All of these
Blades are equiangular
Blade velocity coefficient is unity
Blades are equiangular and frictionless
Blade solidity is 0.65
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
Ash
Volatile matter
Moisture
Hydrogen
Boiler drums
Superheater tubes
Economiser
A separate coil located in convection path.
0.2
0.8
1.0
0.6
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Water level indicator
Pressure gauge
Safety valve
All of these
The expansion of steam in a nozzle follows Rankine cycle.
The friction in the nozzle increases the dryness fraction of steam.
The pressure of steam at throat is called critical pressure.
All of the above