More
Less
Equal
None of these
B. Less
(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)
Former occupies less space for same power
Rate of steam flow is more in former case
Former is used for high installed capacity
Chances of explosion are less in former case.
Amount of water evaporated per hour
Steam produced in kg/h
Steam produced in kg/kg of fuel burnt
All of these
21 %
23 %
30 %
40 %
Indicated power
Brake power
Frictional power
None of these
Heating the oil in the settling tanks
Cooling the oil in the settling tanks
Burning the oil
Suspension
Choked
Under-damping
Over-damping
None of these
75
115
165
225
Horizontal
Vertical
Inclined
None of these
Straight
Circular
Curved
None of these
Heated sufficiently
Burnt in excess air
Heated to its ignition point
Burnt as powder
78-81 %
81-85 %
85-90 %
90-95 %
(h - hf1)/2257
(h + hf1)/2257
(h × hf1)/2257
None of these
Increases
Decreases
Remains constant
None of these
Steam boiler
Steam turbine
Steam condenser
Steam injector
Has no effect on
Decreases
Increases
None of these
Throttle governing
Cut-off governing
By-pass governing
None of these
Velocity increases
Velocity decreases
Velocity remains constant
Pressure remains constant
Equal to
Twice
Three times
Four times
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
Induced draft fan
Smoke meter
Chimney
Precipitator
Isothermal process
Isentropic process
Throttling process
Free expansion process
Blow off cock
Fusible plug
Stop valve
Safety valve
Where low speeds are required
For small power purposes and low speeds
For large power purposes
For small power purposes and high speeds
Work done during the Rankine cycle
Work done during compression
Work done during adiabatic expansion
Change in enthalpy
Linearly
Slowly first and then rapidly
Rapidly first and then slowly
Inversely
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Air delivered by forced draft fan
Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
Boiler efficiency
None of these
Swept volume to the volume at cut-off
Clearance volume to the swept volume
Volume at cut-off to the swept volume
Swept volume to the clearance volume
More
Less
Equal
May be more or less depending on capacity of reheater