V = 44.72 hd K
V = 44.72 K hd
V = 44.72 K hd
V = 44.72 K hd
C. V = 44.72 K hd
Horizontal
Vertical
Inclined
None of these
Area of the actual indicator diagram to the area of theoretical indicator diagram
Actual workdone per stroke to the theoretical workdone per stroke
Actual mean effective pressure to the theoretical mean effective pressure
Any one of the above
Increases the workdone through the turbine
Increases the efficiency of the turbine
Reduces wear on the blades
All of these
Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Equal to
Lower than
Higher than
None of these
Low
Very low
High
Very high
Heat transfer takes place
Work is done by the expanding steam
Internal energy of steam changes
None of the above
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
None of the above
Before the economiser
Before the superheater
Between the economiser and chimney
None of these
Water space also
Chimney
Steam space
Superheater
Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
Increase the temperature of saturated steam without raising its pressure
Internally fired
Externally fired
Internally as well as externally fired
None of these
Lowers the boiling point of a liquid
Raises the boiling point of a liquid
Does not affects the boiling point of a liquid
Reduces its volume
Remain same
Increases
Decreases
Behaves unpredictably
Babcock and Wilcox
Locomotive
Lancashire
Cochran
Internally fired
Externally fired
Internally as well as externally fired
None of these
421 kg.m
421 kg.m
539 kg.m
102 kg.m
There is a pressure drop in the nozzle
Fluid flows through the nozzle
Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
Avoid excessive build up of pressure
Avoid explosion
Extinguish fire if water level in the boiler falls below alarming limit
Control steam dome
The efficiency of steam turbines is greater than steam engines
A flywheel is a must for steam turbine
The turbine blades do not change the direction of steam issuing from the nozzle
The pressure of steam, in reaction turbines, is increased in fixed blades as well as in moving blades
Where low speeds are required
For small power purposes and low speeds
For large power purposes
For small power purposes and high speeds
The steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
The expansion of steam takes place partly in the fixed blades and partly in the moving blades
The steam is expanded from a high pressure to a condenser pressure in one or more nozzles
The pressure and temperature of steam remains constant
Coking coal
Non-coking or free burning coal
Pulverised coal
High sulphur coal
0.1 kg/cm²
1 kg/cm²
100 kg/cm²
225.6 kg/cm²
100 kg/cm² and 540°C
1 kg/cm² and 100°C
218 kg/cm² abs and 373°C
218 kg/cm² abs and 540°C
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
None of these
200-400 kcal/ kg
800-1200 kcal/ kg
2000-4000 kcal/ kg
5000-8000 kcal/ kg
To determine the generating capacity of the boiler
To determine the thermal efficiency of the boiler when working at a definite pressure
To prepare heat balance sheet for the boiler
All of the above
Higher calorific value at constant volume
Lower calorific value at constant volume
Higher calorific value at constant pressure
Lower calorific value at constant pressure
Lancashire boiler
Babcock and Wilcox boiler
Locomotive boiler
Cochran boiler