Producer gas
Coal gas
Mond gas
Coke oven gas
B. Coal gas
When molecular momentum of the system becomes zero
At sea level
At the temperature of - 273 K
At the centre of the earth
3p/E × (2/m - 1)
3p/E × (2 - m)
3p/E × (1 - 2/m)
E/3p × (2/m - 1)
Two constant volume and two isentropic
Two constant pressure and two isentropic
Two constant volume and two isothermal
One constant pressure, one constant volume and two isentropic
50 %
25 %
0 %
15 %
Thermodynamic law
Thermodynamic process
Thermodynamic cycle
None of these
Molecular mass of the gas and the specific heat at constant volume
Atomic mass of the gas and the gas constant
Molecular mass of the gas and the gas constant
None of the above
No stress
Shear stress
Tensile stress
Compressive stress
External energy
Internal energy
Kinetic energy
Molecular energy
p.v = constant, if T is kept constant
v/T = constant, if p is kept constant
p/T = constant, if v is kept constant
T/p = constant, if v is kept constant
Heat and work crosses the boundary of the system, but the mass of the working substance does not crosses the boundary of the system
Mass of the working substance crosses the boundary of the system but the heat and work does not crosses the boundary of the system
Both the heat and work as well as mass of the working substance crosses the boundary of the system
Neither the heat and work nor the mass of the working substance crosses the boundary of the system
Inversely proportional to two times
Directly proportional to
Inversely proportional to
None of these
L = l/2
L = l/√2
L = l
L = 2l
When coal is first dried and then crushed to a fine powder by pulverising machine
From the finely ground coal by moulding under pressure with or without a binding material
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
By heating wood with a limited supply of air to a temperature not less than 280°C
Malleability
Ductility
Plasticity
Elasticity
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
None of these
Zero
wl/4
wl/2
wl²/2
Double
Half
Same
None of these
Creeping
Yielding
Breaking
Plasticity
Enthalpy
Internal energy
Entropy
External energy
Principal stresses
Normal stresses on planes at 45°
Shear stresses on planes at 45°
Normal and shear stresses on a plane
Change
Do not change
Both (A) and (B)
None of these
Pressure exerted by the gas
Volume occupied by the gas
Temperature of the gas
All of these
Temperature limits
Pressure ratio
Compression ratio
Cut-off ratio and compression ratio
Tensile in both the material
Tensile in steel and compressive in copper
Compressive in steel and tensile in copper
Compressive in both the materials
wl/4
wl/2
wl
wl²/2
Slenderness ratio and area of cross-section
Poisson's ratio and modulus of elasticity
Slenderness ratio and modulus of elasticity
Slenderness ratio, area of cross-section and modulus of elasticity
Equal to
Less than
More than
None of these
First kind
Second kind
Third kind
None of these
Drying and crushing the coal to a fine powder
Moulding the finely ground coal under pressure with or without a binding material
Heating the wood with a limited supply of air to temperature not less than 280°C
None of the above
t
2t
4t
8t