Answer / udaya17

seemless tubes are made by stainless steel composites

Answer / murali

made by extrusion of steel billets

Answer / ferozh

they are made by piercing the steel tube and rolling simultaneously, in order to get the hollow tube. they are also produced by cold extrusion techniques.

Answer / souren roy

piercing...

Answer / vijay kumar

Seam less tube are made by piercing and also (extrusion-if long pipe and high pressure required)

what is the function of series reactor

3 Answers   Adhunik, INOX, RMSI,

what is level 2 automation?

0 Answers  

In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

0 Answers   RRB,

what ispositive, negative, zero sequence impedence?

0 Answers  

How can we calculate the resistance of earthing & how can we control it?

2 Answers  

How to measure the capacity/rating of a distribution transformer in KVA?

0 Answers  

what relation between transmission line & communication line?

1 Answers   NTPC,

For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

0 Answers   Ecil,

What will be the excat cable specification in Sq MM...please find the details below.... Induction Motor HP:55 Amps:70(starting Amps),45(Running Amps). Volts:415

1 Answers  

1. If we apply dc supply to the primary winding of transformer it will be burnt out. similarly dc supply is given to field winding of syn. motor and armature winding of dc motor, they are safe. (Remember both windings inductive nature) what is the reason behind that?

2 Answers  

the cheapest inducting instrument among all is a)pmmc b)moving iron c)electrodynamometer d)rectifier

2 Answers   APCPDCL, APEPDCL,

If the generator will trip, what you will do as an electrical technician in charge.

1 Answers