Deepakkumar Yadav
ydeepak297@gmail.com Need of Parallel Operation of Alternators and Condition for Satisfactory Parallel Operation. Q. Why the alternators are connected in parallel ? What are the conditions to be fulfilled successful parallel operation of alternators? Need of parallel operation of alternators and condition for satisfactory parallel operation : Load growth : Load demand is now a days … Read more
Tests to be Carried out on Transformer Under Routine Tests and Special tests Q. Enlist any four tests to be carried out on transformer under routine tests and special tests. Routine Tests : Measurement of D.C. Resistance of Winding Measurement of Voltage Ratio and Check of Voltage. Vector Relationship (Polarity Test and Phasing – out … Read more
Objectives of Machines Testing Q. What are the objectives of testing Q. Explain why testing is carried out on machines or equipment’s. The main objective of testing is to know the quality of the machine, quality of materials used for manufacturing the machine and also to check its behavior and performance as per the design … Read more
Tests to be Carried Out on 3 Phase Induction Motor Q. List out the tests to be carried out on 3 phase induction motor as per I.S. 4029 – 1967 and is 325 – 1961. Routine Tests : These tests are carried out on each and every motor manufactured in the industries. As per I.S. … Read more
Types of Fire Extinguishers Q. Which types of fire extinguishers are in your institute state their locations. Types of Fire Extinguisher Many types of fire extinguishers are available with different extinguishing ‘agents’ to deal with different classes of fires. Water-filled extinguishers: There are two methods of operation. Gas cartridge type Stored pressure type With both … Read more
Conditions for Parallel Operation of 3Φ Transformer. Q. State various conditions for parallel operation of 3Φ transformer. Conditions : Voltage ratings of the primary windings should be suitable for supply system voltage and frequency. The windings must be properly connected as regards their polarities. Voltage ratings of primary and secondary of both transformers must be identical … Read more
Objectives of Reduced Voltage Running up Test on 3 Φ IM. Q. Describe the objectives of reduced voltage running up test on 3 Φ IM. Many induction motors are started with star – Delta starter where the applied voltage at starting is 1√3 times the rated voltage. To ascertain the ability of the motor to run at … Read more
Specific Test Before And After Commissioning of Transformer Q. List the specific test before and after commissioning of transformer. 1. Mechanical tests 2. Electrical tests THESE RULES MUST BE FOLLOWED FOR ALL TEST PROCEDURES. Following is an approximate sequence for transformer testing: 1. Inspect transformer and parts for shipping damage and moisture. 2. Check nameplate … Read more
Electric Accidents Q. Define following term w.r.t. electric accidents. (i) Safety (ii) Hazard … Read more
Do’s and Don’ts For Working on Electrical Equipment Q. State the general Do’s and Don’ts for working on electrical equipment. Do’s : 1. Before replacing a lamp or handling a … Read more