HVAC
Heat Exchanger Designs
Calculations for heat exchanger designs use heat transfer parameters such as convection heat transfer coefficients,…
Material Science
Non-Destructive testing (NDT)
NDT is the method of detection and measurement of properties or condition of materials, structures, machines without damaging or destroying their operational capabilities. Examples ofNDT are: magnetic dust method, penetrating liquid method, ultrasonic test and radiography. All NDTs are used to detect various types of flaws on the surface of material or internal inclusions of impurities and these techniques are also very useful during preventive maintenance and repair. There are few techniques which do not require any special apparatus and are quite simple to handle and only a moderate skill being required. Some of the applications of NDTs are detecting: (i) surface cracks (ii) material composition (iii) internal inclusions (iv) internal voids and discontinuities and (v) condition of internal stresses.
Theory of Machines
Gears for connecting intersecting shafts
Bevel gears are useful when the direction ofa shaft's rotation needs to be changed. They are…
Theory of Machines
CAM Introduction
Cam - A mechanical device used to transmit motion to a follower by direct contact.…
Theory of Machines
Contact Ratio (or) Number of Pairs of Teeth in Contact
To assure continuous smooth tooth action, as one pair of teeth ceases action a succeeding…
Welding Processes
Types of Welded Joints
There are five different types of welded joints for bringing two parts together for joining.…
Non Destructive Testing
Present State of Eddy Current Inspection
Eddy current inspection is used in a variety of industries to find defects and make…
Powerplant Engineering
Comparison between Impulse and Reaction Steam Turbines
In Impulse Turbine, steam completely expands in the nozzle itself. Hence its pressure remains constant…
Theory of Machines
Velocity Ratio of Belt Drive
It is the ratio between the velocities of the driver and the follower or driven.…
