Q. Can Poisson Ratio be Negative or zero?
Ans.: Poisson's ratio for a cork is almost zero. Yes Poisson's ratio can be negative. Such materials are called as "auxetics". E.g. Human ligaments
Q. Poisson’s Ratio is higher in, Rubber/Steel/Wood?
Ans.:
For rubber = 0.5
For steel = 0.288
For wood < 0.2
Thus Poisson’s ratio is higher in RUBBER.
Q: What is Truss?
Ans.: Truss is a rigid structure composed of number of straight members pin jointed to each other.
It can sustain dynamic and static load without any relative motion to each other.
Q. State Third Law of Thermodynamics.
Ans.: Third Law of Thermodynamics states that entropy of the system approaches constant value as the temperature approaches absolute zero.
Q: What is enthalpy?
Ans.: Enthalpy is the heat content of a chemical system. It is a measure of total energy of a thermodynamic system.
Q: Which conducts heat faster steel or copper or brass?
Ans.: Copper conducts heat faster than steel or brass.
Q: State Stefan–Boltzmann Law.
Ans.: The total energy radiated per unit surface area of a black body in unit time is proportional to the fourth power of the thermodynamic temperature.
σ = 5.670 x 10-8 Wm-2K-4
Q: Types of truss:
Ans.:
Plain truss
Rigid truss
Simple truss.
Q: What is IC Engine?
Ans.: The internal combustion engine converts chemical energy into useful mechanical energy by burning fuel.
Chemical energy is released when the fuel-air mixture is ignited by the spark in the combustion chamber. The gas produced in this reaction rapidly expands forcing the piston down the cylinder on the power stroke.
Q: Definition of Octane Number and Cetane Number?
Ans.: Octane No. - Octane number is defined as the percentage, by volume, of iso-octane in the mixture of iso-octane and h-heptane. It is the measure of rating of SI engine.
Cetane No. - Cetane number is defined as the percentage, by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene. It is the measure of rating of CI engine.
Ans.: Poisson's ratio for a cork is almost zero. Yes Poisson's ratio can be negative. Such materials are called as "auxetics". E.g. Human ligaments
Q. Poisson’s Ratio is higher in, Rubber/Steel/Wood?
Ans.:
For rubber = 0.5
For steel = 0.288
For wood < 0.2
Thus Poisson’s ratio is higher in RUBBER.
Q: What is Truss?
Ans.: Truss is a rigid structure composed of number of straight members pin jointed to each other.
It can sustain dynamic and static load without any relative motion to each other.
Q. State Third Law of Thermodynamics.
Ans.: Third Law of Thermodynamics states that entropy of the system approaches constant value as the temperature approaches absolute zero.
Q: What is enthalpy?
Ans.: Enthalpy is the heat content of a chemical system. It is a measure of total energy of a thermodynamic system.
Q: Which conducts heat faster steel or copper or brass?
Ans.: Copper conducts heat faster than steel or brass.
Q: State Stefan–Boltzmann Law.
Ans.: The total energy radiated per unit surface area of a black body in unit time is proportional to the fourth power of the thermodynamic temperature.
σ = 5.670 x 10-8 Wm-2K-4
Q: Types of truss:
Ans.:
Plain truss
Rigid truss
Simple truss.
Q: What is IC Engine?
Ans.: The internal combustion engine converts chemical energy into useful mechanical energy by burning fuel.
Chemical energy is released when the fuel-air mixture is ignited by the spark in the combustion chamber. The gas produced in this reaction rapidly expands forcing the piston down the cylinder on the power stroke.
Q: Definition of Octane Number and Cetane Number?
Ans.: Octane No. - Octane number is defined as the percentage, by volume, of iso-octane in the mixture of iso-octane and h-heptane. It is the measure of rating of SI engine.
Cetane No. - Cetane number is defined as the percentage, by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene. It is the measure of rating of CI engine.
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