Deepakkumar Yadav
Reasons for Developing Electrical and Magnetic Fault. Q.Give the reasons for developing electrical and magnetic fault. Electrical Faults : Sr. No. Faults Reason Remedial measures 1 Wrong electric connections Field winding connections may be wrong. Field-Armature winding connections might be wrong. 3-phase motor phase sequence connection R-Y-B may be wrong. Check the connection. Check direction of … Read more
Distinguish Between Routine and Break-down Maintenance of Electrical Equipment’s Q. Distinguish between routine and break-down maintenance of electrical equipments. Sr. No. Routine Maintenance Break Down Maintenance 1 As the name suggest, it is the maintenance as a routine work i.e. daily work so routine maintenance is a overall daily maintenance of the machine. As the little … Read more
Body Effect of Shock When Current Passing Through a Body Q. What is the body effect of shock when current of 1 mA, 4-15 mA, 100 mA current passing through a body ? Current (mA) Shock effect 1 mA Perceptible, No-pains. 4-15mA Medium but painful, but no-loss on muscular control. 15-20 mA Painful, muscular control … Read more
Distinguish between Routine Test and Type Test Q. Distinguish between Routine Test and Type Test. Sr. No. Routine Test Type Test 1 These tests are carried out on each and every machines manufactured in the industry. This tests are carried out on few machines from the lot of the machines of same designs and specification. … Read more
Mechanical Faults and Causes in Case of Electrical Machines Q. List out the mechanical faults and causes in case of electrical machines. Mechanical Faults : Sr. No Fault Reasons Remedial measures 1 Bent shape Drawback in shaft coupling machine to machine or machine to load shaft. Due care during storage, transportation must be taken. 2 … Read more
Steps to be Followed for Shut Down Q. State the steps to be followed for shut down. Following Procedure is Followed for Obtaining Permits for Shut down For major, routine repairs and emergency work on the electric lines (Transmission line, feeder line on distributor line) maintenance programm is prepared and declared. For this major work … Read more
Tests to be Carried Out on Transformer as per IS – 2026 Q. List out the tests to be carried out on transformer as per IS – 2026. Also state the objective Heat run on test on transformer. Routine Test Type Test Special Test Supplementary Test
Back to Back Test for Efficiency of Transformer Q. Explain with neat sketch back to back test for efficiency of transformer. Connection-circuit diagram Primary of auxiliary transformer A and B an the two identical Y – Y connected transformers. One more transformer is needed called as an auxiliary transformer (C). This is also a Y connected … Read more
Importance of Planning of Preventive Maintenance Schedule Q. State the importance of planning of preventive maintenance schedule. Following points are firstly considered prior to prepare a final preventive maintenance schedule. Too frequent inspections-will cause waste of time and will not be economical. Too less frequency will invite failure of operation of machine; and it will … Read more
Activities That are Done During Preventive Maintenance of Induction Motors Q. State any six activities that are done during preventive maintenance of induction motors. The activities that are done during preventive maintenance of induction motors are : Attention towards brushes : Sparking at the brushes : Sparking is produced due to misalignment of commutator, mechanical … Read more