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Duty cycle
The concept of duty cycle is to be clearly understood before operating any machine. Unlike the arc welding power sources, the resistance welding power sources are designated for 1 minute integrating period. Suppose a machine is rated for 50 % duty cycle, it means that after operating the machine for ½ min. at full load, the machine has to be cooled for the next ½ min. The duty cycle at loads different to the full load can be calculated from the formula.Duty cycle at Y kVA = (rated kVA / Y kVA) x rated KVAThis formula is applicable straight in the case of under loads but while overloading, we should not overlook the constraint imposed by the maximum capacities of the circuit elements e.g. diodes, contacts, etc., though the machine is going to be overloaded to that extent only for a very brief period allowed by this formula. In effect, this formula takes care of the heating of the winding only.
when is scaling transformation termed as linear
Data given for gear problem T P = 30 TG = 80 φ = 20o m = 12 mm Addendum = 10 mm then determine the length of path of contact, length of Arc of contact and contact Ratio.
Q. Radiographic examination of welded joints? Radiographic examination (RT) of welded joints shall be performed as required by the Code. Acceptance criteria shall be in accord
Determine the maximum stress developed in the beam: An I section in Figure is utilized as a beam. The beam is subjected to a bending moment of 2.5 kN m at its neutral axis. De
Q. Identification of Defects of coating? All holidays and other coating defects, including without limitation primer blister, excess powder mounds, crazed coating, lifted and u
All shell and head joints shall be double-welded butt joints with full penetration. In cases where double welding is impractical, the root pass shall be made by the GTAW process.
Relativity of simultaneity Two events occurring at different space co-ordinates x 1 and x 2 in an inertial frame S, are said to be simultaneous, if they occur at the same tim
#question.want settle down where sheet metal engineers are required.
Determine the Location of Any Zero Crossings For the loaded as shown below a. Draw the V & M diagrams on the grid below. b. Determine the location of any zero crossings
Find the maximum shear stress at free end: A stepped shaft ABCD, with A is fixed end and D is free end. AB = 1 m, BC = 2 m, CD = 1 m. AB is a hollow shaft of 100 mm outer diam
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