10 to 15 %
15 to 20 %
20 to 30 %
30 to 40 %
A. 10 to 15 %
Increases
Decreases
Has no effect on
None of these
0.528
0.546
0.577
0.582
0.17 MN/m²
1.7 MN/m²
17 MN/m²
170 MN/m²
Ratio of thermal efficiency to the 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
Have common piston rod
Are set at 90°
Have separate piston rods
Are set in V-arrangement
21 %
23 %
30 %
40 %
13 mm
31 mm
130 mm
230 mm
Piston rod
Connecting rod
Eccentric rod
Valve rod
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
50°C and normal atmospheric pressure
50°C and 1.1 bar pressure
100°C and normal atmospheric pressure
100°C and 1.1 bar pressure
100 bar
150 bar
200 bar
250 bar
60°
90°
180°
270°
Climatic conditions
Temperature of furnace gases
Height of chimney
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
One half
One third
One fourth
One fifth
Volume
Pressure
Entropy
Enthalpy
Corroding air heaters
Spontaneous combustion during coal storage
Facilitating ash precipitation
All of the above
Equal to
Less than
More than
None of these
Essentially an isentropic process
Non-heat transfer process
Reversible process
Constant temperature process
Large marine propulsion
Electric power generation
Direct drive of fans, compressors, pumps
All of these
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Non-coking bituminous coal
Brown coal
Pulverised coal
Coking bituminous coal
Throttle governing
Cut-off governing
By-pass governing
None of these
To provide reciprocating motion to the slide valve
To convert reciprocating motion of the piston into rotary motion of the crank
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To provide simple harmonic motion to the D-slide valve
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
Wet steam
Dry saturated steam
Superheated steam
None of these
1 kg/cm²
5 kg/cm²
10 kg/cm²
18 kg/cm²
Increases expansion ratio of steam
Reduces back pressure of steam
Reduces temperature of exhaust steam
All of these
Before the economiser
Before the superheater
Between the economiser and chimney
None of these
Bleeding
Reheating
Governing
None of these