(σx + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]
(σx + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]
(σx - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]
(σx - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]
B. (σx + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]
Elements
Compounds
Atoms
Molecules
Two isothermals and two isentropic
Two isentropic and two constant volumes
Two isentropic, one constant volume and one constant pressure
Two isentropic and two constant pressures
Conservation of work
Conservation of heat
Conversion of heat into work
Conversion of work into heat
Tensile in both the material
Tensile in steel and compressive in copper
Compressive in steel and tensile in copper
Compressive in both the materials
For a given compression ratio, both Otto and Diesel cycles have the same efficiency.
For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
For a given compression ratio, Diesel cycle is more efficient than Otto cycle.
The efficiency of Otto or Diesel cycle has nothing to do with compression ratio.
kJ
kJ/kg
kJ/m2
kJ/m3
(σx/2) + (1/2) × √(σx² + 4 τ²xy)
(σx/2) - (1/2) × √(σx² + 4 τ²xy)
(σx/2) + (1/2) × √(σx² - 4 τ²xy)
(1/2) × √(σx² + 4 τ²xy)
Rankine
Stirling
Carnot
Brayton
Soft coal
Hard coal
Pulverised coal
Bituminous coal
Permanent
Temporary
Semi-permanent
None of these
Mono-atomic
Di-atomic
Tri-atomic
Poly-atomic
(T1/T2) - 1
1 - (T1/T2)
1 - (T2/T1)
1 + (T2/T1)
Resilience
Proof resilience
Modulus of resilience
Toughness
Boyle's law
Charle's law
Gay-Lussac law
Joule's law
Wl3/48 EI
Wa²b²/3EIl
[Wa/(a√3) x EIl] x (l² - a²)3/2
5Wl3/384 EI
Carbon and hydrogen
Oxygen and hydrogen
Sulphur and oxygen
Sulphur and hydrogen
M/I = σ/y = E/R
T/J = τ/R = Cθ/l
M/R = T/J = Cθ/l
T/l= τ/J = R/Cθ
Constant volume process
Adiabatic process
Constant pressure process
Isothermal process
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All the processes, taking place in the cycle of operation, must be extremely slow
The working parts of the engine must be friction free
All of the above
Absolute scale of temperature
Absolute zero temperature
Absolute temperature
None of these
Pressure
Volume
Temperature
Density
0
1
γ
∝
Energy stored in a body when strained within elastic limits
Energy stored in a body when strained up to the breaking of a specimen
Maximum strain energy which can be stored in a body
Proof resilience per unit volume of a material
Oxygen
Nitrogen
Hydrogen
Methane
1 × 102 N/m2
1 × 103 N/m2
1 × 104 N/m2
1 × 105 N/m2
Extensive heat is transferred
Extensive work is done
Extensive energy is utilised
None of these
Linear stress to linear strain
Linear stress to lateral strain
Volumetric strain to linear strain
Shear stress to shear strain
Equal
Proportional to their respective moduli of elasticity
Inversely proportional to their moduli of elasticity
Average of the sum of moduli of elasticity
2
8
16
32
Isochoric process
Isobaric process
Hyperbolic process
All of these