Throttle governing
Cut-off governing
By-pass governing
None of these
A. Throttle governing
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
Heat carried away by flue gases
Heat carried away by ash
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
All of the above
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
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Brake thermal efficiency
Approach temperature should be as low as possible
Handling and maintenance should be easier
Heat transfer area should be optimum
Stack gases should not be cooled to the dew point
Steam pressure exceeds the working pressure
Water level in the boiler becomes too low
Both (A) and (B)
None of the above
Volume of intake steam
Pressure of intake steam
Temperature of intake steam
All of these
Avoid excessive build up of pressure
Avoid explosion
Extinguish fire if water level in the boiler falls below alarming limit
Control steam dome
Superheater
Air-preheater
Economiser
Injector
Remains constant
Decreases
Increases
None of these
Remain same
Increases
Decreases
Behaves unpredictably
Ash
Volatile matter
Moisture
Hydrogen
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
Cornish is fire tube and Lancashire is water tube
Cornish is water tube and Lancashire is fire tube
Cornish has two fire tubes and Lancashire has one
Lancashire has two fire tubes and Cornish has one
Diverge from left to right
Diverge from right to left
Are equally spaced throughout
First rise up and then fall
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
Longitudinally
Circumferentially
On dished end
Anywhere
One
Two
Three
Four
T1 /88.25H
88.25H/T1
T1 /176.5H
176.5H/T1
Increase thermal efficiency of boiler
Economise on fuel
Extract heat from the exhaust flue gases
Increase flue gas temperature
Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these
Back pressure turbine
Pass out turbine
Low pressure turbine
Impulse turbine
1 kg/cm
6 kg/cm
17 kg/cm²
100 kg/cm²
137 fire tubes and 44 superheated tubes
147 fire tubes and 34 superheated tubes
157 fire tubes and 24 superheated tubes
167 fire tubes and 14 superheated tubes
Blow off cock
Fusible plug
Stop valve
Safety valve
Have common piston rod
Are set at 90°
Have separate piston rods
Are set in V-arrangement
160/3 m/s
320/3 m/s
640/3 m/s
640 m/s
30 MW
60 MW
100 MW
500 MW
Supply of excess, air
Supply of excess coal
Burning CO and unburnts in upper zone of furnace by supplying more air
Fuel bed firing
(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)