AMIE Study Circle Blog

A fuel generally has the number of constituents. Some constituents react exothermally and thereby generate heat, and some others do not react chemically at all. The heat generated due to combustion of a unit mass of solid (or liquid) fuel is called its calorific value and is expressed in terms of kJ/kg. For gaseous fuels, the calorific value is expressed as heat liberated by combustion of unit cubic metre of gas at standard temperature and pressure (15 0 C and 760 mm of mercury). 

Answer the following in brief:   List out assumptions to derive of equation of simple bending. Beam is initially straight, and has a constant cross-section. Beam is made of homogeneous material and the beam has a longitudinal plane of symmetry. Resultant of the applied loads lies in the plane of symmetry. The geometry of the overall member is such that bending not buckling is the primary cause of failure. Elastic limit is nowhere exceeded and ‘E’ is same in tension and compression. Plane cross sections remains plane before and after bending  Define the following: Youngs modulus, shear modulus and bulk modulus. Young.s modulus: With in the elastic limit, the ratio of longitudinal stress to longitudinal strain is called young.s modulus.  Bulk modulus: With in the elastic limit, it is defined as the ratio of Bulk stress to Bulk strain  Rigidity modulus: With in the elastic limit, it is defined as the ratio of shearing stress to shearing strain.   Define fac...

Choose the correct answer from the given choices: 1. The dimensional formula of kinematic viscosity of a fluid is (i) LT 2 (ii) L 2 T -1 *   (iii) ML -1 T -1 (iv) ML -2 T -2 Hint: Kinematic Viscosity (ν) = Dynamic Viscosity (μ) / Density (ρ). =  [M¹L⁻¹T⁻¹] / [M¹L⁻³]   2. An open tank contains 60 cm of water covered with 30 cm of oil of specific gravity 0.8. The pressure intensity at the bottom of the tank is nearly (i) 2350 N/m 2 (ii) 3530 N/m 2 (iii) 5880 N/m 2 (iv) 8240 N/m 2  * Hint:  P A  = [ρgh] oil  + [ρgh] water = [0.8 x 9.81 x 0.3] + [1 x 9.81 x 0.6] =8.2404 kN/m 2 = 8240.4 N/m 2     3. The expression p + wZ + ρ v 2 /2 = constant, commonly used to express Bernoulli s equation has units of total energy per unit (i) volume* (ii) mass (iii) weight (iv) cross-sectional area of flow 4. The hydraulic diameter used in place of diameter for a non-circular duct is equal to (i) A/P (ii) 4xA/P* (iii) 2A/P (iv) 4P/A ...

Answer the following in brief: How Fixed Carbon is determined? What are its Benefits? The fixed-carbon content of a coal is determined by subtracting the percentages of moisture, volatile matter, and ash from a sample. The % of fixed carbon is calculated as % of fixed carbon = 100 - [% of moisture + % of volatile matter + % of ash]   The % of fixed carbon increases the ranking of coal because the more is the amount of fixed carbon higher will be the calorific value of coal and quality of coal will also be better. At the same time it helps in designing of furnace and fire box.   List Advantages and Disadvantages of Nuclear Fusion. Pros of nuclear energy: 1. Carbon-free electricity 2. Small land footprint 3. High power output 4. Reliable energy source Cons of nuclear energy: 1. Uranium is technically non-renewable 2. Very high upfront costs 3. Nuclear waste 4. Malfunctions can be catastrophic    What are the Advantages of Hydroelectricity? Renewable. Hydropower is comp...

Sketch electrical equivalent circuit of a photovoltaic diode and write the expression of the output current.  \(I = {I_{ph}} - {I_0}\left( {{e^{(V + I{R_s})/n{V_T}}} - 1} \right) - \frac{{V + I{R_s}}}{{{R_{sh}}}}\)    Make a comparison between horizontal axis wind turbine and vertical axis wind turbine.   State Faraday's law of electrolysis. First Law of Electrolysis The amount of substance (mass) deposited or liberated at any electrode during electrolysis is directly proportional to the quantity of electricity (charge) passed through the electrolyte.   Second Law of Electrolysis When the same quantity of electricity passes through different electrolytes, the mass of substances deposited or dissolved is proportional to their chemical equivalent weights.    What are various wind energy storage systems? Battery Energy Storage Systems: These include lithium-ion, solid-state, and flow batteries.Thermal Energy Storage: This method stores energy in the form ...

Answer the following questions.   Notch sensitivity factor. The Notch Sensitivity Factor is a crucial concept in materials engineering and fatigue design. It quantifies how sensitive a material is to the presence of a stress concentrator (like a notch, hole, fillet, crack, or sudden change in cross-section). In simpler terms: It tells you how much a real-world "notch" reduces a material's fatigue strength compared to its ideal, smooth condition. Spigot and socket joint for pipes. A spigot and socket joint (also commonly called a bell and spigot joint) is a type of pipe connection used in plumbing and pipeline systems. One end of a pipe is formed into a plain, narrower spigot (male end), while the opposite end of the adjoining pipe has an enlarged socket (or bell, the female end). The spigot is inserted into the socket to create a continuous pipeline. State two important reasons for adopting involute curves for a gear tooth profile. Constant velocity ratio during meshing: ...

Answer the following in brief.   Define Product Design Specifications (PDS). Product Design Specification (PDS) is a detailed document that defines the complete requirements, constraints, and desired characteristics of a product to be designed. It serves as a definitive reference throughout the design process, ensuring that the final product meets the intended purpose and stakeholder needs.    What is the role of database management systems in computer-integrated manufacturing (C1M)? Computer-Integrated Manufacturing (CIM) is a manufacturing approach that uses computers to integrate and automate all aspects of production, from design and planning to execution, quality control, and business functions, often through a centralized or common database.Database Management Systems (DBMS) play a pivotal role in CIM by serving as the backbone for data integration, storage, retrieval, and sharing across the entire manufacturing enterprise.    List two advantages of modula...