Answer / mohd hakim

its an emergency rescue device whenever elevator stuck between two floors its sense and open the door of the elevator to the nearest floor after 3 minuteswith the help of dc batteries.

Generally in d.c. circuits the direction of current is from possitive to negative.In a.c.circuits what is the direction fo current flow

4 Answers  

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What is Neutral Transformer? what is the use of this?

4 Answers  

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what will be the efficiency off x'mer during no load test and during short circuit test

1 Answers   GPSC Gujarat Public Service Commission,

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I have three phase 400 KW,390 A MOTOR.For this motor which type of Cable is required....specifically rubber cable required. Can anyone help me..

5 Answers  

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what about GD square and its important for motor design?

0 Answers   Innovis, MNC,

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i am going to attaned the engineer (disign)iterview at HAL please give me duid line

0 Answers   HAL,

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What should be the minimum and maximum ohmic value for earthing?

2 Answers  

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% voltage variation in distribution a)1% b)5% c)10% d)15%

2 Answers  

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While DG is on Load? we can start the capacitor bank?

3 Answers   Inorbit,

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What is effect of over voltage and under voltage on ACB

0 Answers   EFS,

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What is an ac motor?

0 Answers  

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why v/f ratio to maintain constant in speed control of induction motor?

3 Answers  

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