AMIE Study Circle Blog

Presently, AMIE aspirants fall into two categories. Those with the date of the election before May 31, 2013, and then whose date of the election is after May 31, 2013. If you are in the first category, then, as per AICTE public notice, you will be treated as equivalent to B.E./B TECH and may take all prevailing benefits. In this respect, if you still could not complete AMIE because of your busy schedule or any other reason, you can apply for re-registration and take benefit from this condition by AICTE. You can join our re-registration package. See pricing & free samples at his link https://amiestudycircle.com/recruitment-pricing.html However, if your date of the election is after May 31, 2013, then you have the following choices: Choice #1: Stop/postpone doing AMIE Stop/postpone doing AMIE to do it later after the final high court judgement, if favourable. Choice #2: Still pursue AMIE Still pursue AMIE considering that you are lucky enough to be in pipeline, i.e. better than those

1. The fin efficiency is defined as the ratio of the actual heat transfer from the fin to (a) The heat transfer from the same fin with an adiabatic tip. (b) The heat transfer from an equivalent fin which is infinitely long. (c) The heat transfer from the same fin if the temperature along the entire length of the fin is the same as the base temperature. (d) None of the above. 2. A cylindrical pin fin of diameter 0.6 cm and length of .3 cm with negligible heat loss from the tip has an efficiency of 0.7. The effectiveness of the fin is (a) 0.3 (b) 0.7 (c) 2 (d) 8 (e) 14 3. For the same initial conditions, one can expect the laminar thermal and momentum boundary layers on a flat plate to have the same thickness when the Prandtl number of the flowing fluid is (a) close to zero (b) small (c) approximately one (d) large (e) very large 4. The transition from laminar flow to turbulent flow in a forced convection situation is determined by which one of the following dimensionless numbers? (a)

Explain the following in brief Clausius inequality The following equation is known as the inequality of Clausius. It provides the criterion of the reversibility of a cycle. ∮(dQ/T) ≤ 0 If ∮(dQ/T) = 0 then the cycle is reversible If ∮(dQ/T) < 0 then the cycle is irreversible and possible If ∮(dQ/T) > 0 the cycle is irreversible and possible Nucleate boiling In nucleate boiling, steam bubbles form at the heat transfer surface and then break away and are carried into the mainstream of the fluid. It is a type of boiling that takes place when the surface temperature is hotter than the saturated fluid temperature by a certain amount but where the heat flux is below the critical heat flux.  Entropy principle All heat is not equally valuable for converting into work. The heat that is supplied to a substance at a high temperature has a greater possibility of conversion into work than heat supplied to a substance at a lower temperature. “Entropy is a function of a quantity of heat which sh

Write a short note on any four.   Natural Convection Vs Forced convection Free or natural convection. Free or natural convection occurs where the fluid circulates by virtue of the natural differences in densities of hot and cold fluids; the denser portions of the fluid move downward because of the greater force of gravity, as compared with the force on the less dense. Forced convection. When the work is done to blow or pump the fluid, it is said to be forced convection. Clapeyran equation       Clausius-Claperyon equation is a relationship between the saturation pressure, temperature, the enthalpy of evaporation, and the specific volume of the two phases involved. This equation provides a basis for calculations of properties hi a two-phase region.  This is known as Clausius-Claperyon or Claperyon equation for evaporation of liquids. The derivative dp/dT is the slope of vapour pressure versus temperature curve. where, s g  = Specific entropy of saturated vapour, s f  = Specific entropy

Multiple choice questions choose the correct answer (20 marks) 1. Measurement of temperature is based on ⸺ (a) thermodynamic properties (b) zeroth law of thermodynamics (c) the first law of thermodynamics (d) the second law of thermodynamics 2. Carnot cycle efficiency depends upon ⸺ (a) properties of the medium/substance use (b) condition of engine (c) working condition (d) temperature range of operation 3. In a Rankine Cycle, heat output is obtained from (a) Condenser (b) Boiler (c) Turbine (d) Pump 4. The ideal gas-refrigeration cycle is similar to (a) Brayton cycle (b) Reversed Brayton cycle (c) Rankine cycle (d) Reversed Rankine cycle 5. When humidity ratio of air------air is said to be dehumidified. (a) increases (b) decreases (c) remains constant (d) None of the mentioned 6. Heat transfer deals with the rate of (a) work transfer (b) temperature transfer (c) energy transfer (d) None of the above 7. Aluminium is used as a fin material because (a) it has a higher convection heat tr

Answer briefly on the following (4 x 5) Zeroth law of thermodynamics Zeroth law of thermodynamics states that if the bodies A and B are in thermal equilibrium with a third body C separately then the two bodies A and B shall also be in thermal equilibrium with each other.  Condensation Condensation is the change of the physical state of matter from the gas phase into the liquid phase and is the reverse of evaporation. It can also be defined as the change in the state of water vapour to liquid water when in contact with any surface.  Clausius inequality The following equation is known as the inequality of Clausius. It provides the criterion of the reversibility of a cycle. ∮(dQ/T) ≤ 0 If ∮(dQ/T) = 0 then the cycle is reversible If ∮(dQ/T) < 0 then the cycle is irreversible and possible If ∮(dQ/T) > 0 the cycle is irreversible and possible Kirchhoff’s law Kirchhoff's Law:  The law states that at any temperature the ratio of total emissive power E to the total absorptivity a is a

Answer the following (10 x 2) What for Castigliano’s first theorem is used? Castigliano’s first theorem: The first partial derivative of the total internal energy (strain energy) in a structure with respect to any particular deflection component at a point is equal to the force applied at that point and in the direction corresponding to that deflection component. This first theorem is applicable to linearly or nonlinearly elastic structures in which the temperature is consta nt and the supports are unyielding. It is given as ∂U/∂Δ i  = P i Discuss the concept of indeterminacy for steel structures. A structure that cannot be analysed by using equations of equilibrium only is called a  statically indeterminate structure,  e.g., fixed beams, continuous beams, propped cantilevers.  To analyse indeterminate structures, apart from using equations of equilibrium one has to determine the various deformations and make use of compatibility conditions.  Indeterminate structures arc also called re