Deepakkumar Yadav
Procedure To Rescue A Person Who Received An Electric Shock Q.Explain The Procedure To Be Followed To Rescuing A Person Who Have Received An Electric Shock? The procedure to be followed to rescue a person who has received an electric shock is as follows Call the doctor immediately. If the main switch is close by, … Read more
Precautions should taken To Avoid Fire Due To Electrical Reasons Q.What precautions should be taken to avoid fire due to electrical reasons ? Precautions to be taken to avoid fire due to electrical reasons are as follows: 1.If the electrical equipment which is under fire is definitely “DEAD”, The fire can be tackled as an … Read more
Causes of Electrical Accidents Q. What Are The Causes Of Electrical Accidents? Causes of electrical accidents : Accident can also be to the system such as short circuit , seviour leakage current, breaking of live conductors on other conductor on earth wire, on animals, human beings. Accidents may be due to negligence … Read more
Precaution When Working With Electrical Installation Q. What Safety Precautions Are Necessary When Working With Electrical Installation ? 1. Don’t use loose clothing; Don’t use clothes with metallic buttons. 2. Don’t use nailed shoes. 3. Don’t keep with you the metallic keys, chains while working. 4.Treat everything as live. 5.Thick before you act. 6.To appropriate … Read more
Fire Extinguishers Working Q. Explain the operation of fire extinguishers in brief. A detailed note on all fire-extinguisher is printed in Red and white or Red and Black pains on the cylinder of the extinguisher, Prior to use it, read carefully the instructions. There is a contract of maintenance by the supply company, The maintenance … Read more
Why indirect tests are carried out in Machine Q. Explain why indirect tests are carried out. Give one example. There are two categories of testing the machine, (i) Direct testing (ii) Indirect testing Direct testing is advisable for small capacity machines. But for big capacity machines direct are not possible. This is because (i) … Read more
Separate source voltage withstand test : (Power frequency) Q. Explain with neat sketch power frequency high voltage test on transformer. This test is made with the help of single phase a.c. voltage of sinusoidal waveforms as far as possible and at a frequency not less than 80% of rated frequency. At the end of the … Read more
Different Types of Primary and Secondary Connections of Transformer Q. State the suitability of following type of 3-phase transformer: (i) Y-Y (ii) Y-∆ (iii) ∆– ∆ (iv) ∆ – Y Q. Draw the connection diagram, symbol and phasor diagram of phasor group-1 (New phase displacement) of transformer connection (i) Y-Y (ii) ∆–∆ (iii) ∆-Z Q. Explain Zig-Zag connection of transformer. Types of Primary … Read more
When any one-phase of a 3-phase synchronous motor is short-circuited, the motor A) Will overheat in the spot B) Will fail to pull into step C) Will refuse to start D) Will not come upto speed Correct Answer is C) Will refuse to start Explanation Failure of a … Read more
The A.C. armature winding of an alternator is A) Delta Star connected Generally B) Delta Connected C) Star Delta Connected D) Always Star connected Correct answer is D) Always Star connected Explanation Alternators are connected primarily in the star to achieve the following motives: More economical:- The phase voltages in star connection are 57.7 % … Read more