Assessment of blends of CO2 with butane and isobutane as working fluids for heat pump applications
arun k
s7 m1
College of Engineering, Trivandrum
2007-11 Batch



Introduction
Eco-friendly natural refrigerants as alternative refrigerants

Due to toxicity of NH3, flammability of hydrocarbons, and high pressure and low COP of CO2, blends are mo ....etc

[:=Read Full Message Here=:]

The uniaxial extensional viscosity is a fundamental material property of a fluid which characterizes the resistance of a material to stretching deformations. For microstructured fluids, this extensional viscosity is a function of both the rate of deformation and the total strain accumulated. Some of the most common manifestations of extensional viscosity effects in complex fluids are the dramatic changes they have on the lifetime of a fluid thread undergoing capillary breakup. In a pinching thread, viscous, inertial and elastic forces can all r ....etc

[:=Read Full Message Here=:]

Abstract
Purpose: This paper presents the properties of magneto-rheological fluids and their recent applications and development In recent years. This paper particularly deals about the use of MR fluids in shock absorbing system in cars.
Reviews: The theoretical research results of the properties and applications obtained in the past decades and their developments are also reviewed.
Findings: It is very clearly and well understood from the presented paper that replacement of the traditional methods w ....etc

[:=Read Full Message Here=:]

Presented by:
Clyde Jonathan D’Silva


Super critical Fluids and its Applications
INTRODUCTION
• Definition: Supercritical Fluid is any substance at a temperature and pressure above its Critical point.
• Example: Commonly used Supercritical fluids are CO2 & H2O.
Phase Diagram:
• Few SCF
PROPERTIES OF SCF
• Can penetrate solids like gas.
• Dissolves materials like liquid.
• There is no surface tension in SCF.
• It has a very good solvent property.
• In supercritical en ....etc

[:=Read Full Message Here=:]

161/2014
Maximum : 100 marks
Time : 1 hour and 15 minutes

1.Which constituent in the earth gives plasticity to mould bricks?
(A)Lime
(B)Magnesia
(C ) Silica ’
(D) Alumina

2.The distance from the optical centre to the principle focus of a lens :
(A)Radius of curvature
(B)Focal length
(C )Focus
(D)None of these

3.The study of static electricity ;
(A)Electronics
(C )Electrostatic
(B)Electrostatic Field 
(D)Electron gravity

4.In optical systems, the lens of system of lenses closest to the observer� ....etc

[:=Read Full Message Here=:]

Electrorheological fluids are suspensions of extremely fine non-conducting particles (up to 50 micrometres diameter) in an electrically insulating fluid. The apparent viscosity of these fluids changes reversibly by an order of up to 100,000 in response to an electric field. For example, a typical ER fluid can go from the consistency of a liquid to that of a gel, and back, with response times on the order of milliseconds. The effect is sometimes called the Winslow effect

The ER effect

The change in apparent viscosity is dependent on the ap ....etc

[:=Read Full Message Here=:]

1.The narrow strip of drawing board are joint together byjoints.
(A) Butt and lap joints(B)Lapped and splayed joints
(C ) Tongue and groove joint(D)Butt and dovetail jointsButt and dovetail joints

2.Which wood is used to made wooden T-Square? 
(A) Teak(B)Oak
(C ) Pine(D)Linoleum

3.The designation of standard recommended scalesof 1:10 and 1: 20 is :
(A) M2(B)M 4
(C ) M 5(D)M 3M3

4.The trimmed size of A2 drawing sheet in mm is :
(A) 297x 420(B)420x594
(C ) 594 x 841(D)-210 x 297 .

5.Which type of line is us ....etc

[:=Read Full Message Here=:]

Hey guys, I'm a Mec undergraduate. Here's my request-->If anyone has information or any report/ppt on the above topic, kindly post them. I'll be grateful!

Regards,
eGeek
....etc

[:=Read Full Message Here=:]

Important two-phase fluid mechanics problems that are dominated or significantly affected by capillary effects are not oddities but rather daily events in our lives. Seemingly unrelated topics such as the economics of satellite television and pulmonary health and safety research share capillary fluids physics. Current and future miniaturized two-phase heat transfer loops and fuel cells possess similar concerns. This seminar presents research in a number of capillary fluids topics on Earth and in orbit. An energy method code, Surface Evolver, is ....etc

[:=Read Full Message Here=:]

141/2016
Maximum: 100 marks
Time : 1 hour and 15 minutes

1. Box of prismatic compass is made of:
(A)copper(B)nickel
(C ) brass(D) none of these

2.The specific gravity of stone should not in any case less than :
(A)2.5 (B)2
(C )1.5 (D)1

3.The rocks which are deposited in layers and can be easily split 

along such layers is known as:
(A)aqueousrock
(B)sedimentary rock
(C )metamorphic rock
(D)basalt

4.The extend of land that gets irrigated from a water source is :
(A) duty '
(B) delta
(C )ayacut
( ....etc

[:=Read Full Message Here=:]