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Engineering

Engineering is an art and profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life.

5,839 Questions

How do you calculate Thread strength?

You measure it. If you want to calculate it, please clarify what information you have available.

Why is three phase voltage 400 V when single phase is 230 single phase 1.73 3 phase. what is 1.73?

I will try and make this as simplified as possible.

The secondary side of transfomers are connected in star - which means there is a neutral / earth connection. If you measure between a LINE to LINE ('line voltage') voltage you will measure 400V, but now we have introduced the neutral / earth and we measure between LINE to NEUTRAL ('phase voltage) 's LINE to EARTH we will get 230 V.

The reason for this is that, because the phase voltages are displaced, in time, by 120 electrical degrees, you must add them vectorially to obtain the line voltage. And the vectorial sum of two 230-V phase voltages, displaced by 120 degrees, is 400 V -or 1.732 times either of the phase voltages.

Explain the differences between the running-config and the startup-config?

The statup-config is the configuration that is loaded when the router boots or powers up.

The runnning-config is the current configuration in the router. It may have been modified since the last boot and so might be different.

Having these two provides a nice safety feature. Changes can be made to the running-config and if something badly goes wrong, you can restart the router and get back to the configuration without the changes.

What would you use to align something in a four jaw chuck on a lathe?

It depends on the surface finish of the workpiece. For machined surface a magnetic base dial indicator is used. For rough or un-machined surfaces a surface gauge is used.

What is a telegrapher?

Originally before we were able to send voice massages by telephone or radio messages were sent through wire using code made up of combination of long beeps and short beeps that were known as Morse code. sending a message in this way was known as sending a telegram over the telegraph system.

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A device or system that uses electric signals to transmit messages by a code or over a wire.

Can a globe valve be uses as a blowdown valve?

HECK NO READ the ASME code or the NBBI Also read up on valves and what they are designed to do.

A "Globe" valve is used for THROTTLING and severely restricts flow

Personally I like using a GATE valve in combination with a ball valve for Blow down applications

What to do you are 2 year down in engineering?

Just keep working hard....take help from your faculty and maintain a good bond with them....never feel guilty about your failures.....keep in touch with your subjects everyday....attend lectures and practicals....do group studies with your friends or someone who'e serious in his/her work.

But most of all when you are doing all these always do it with a happy and positive mind.... take part in extra and co-curricular activities.... and please dont argue or disobey your teachers....acept your mistakes bravely....

Trust Me, you do all this....nothing can stop you. Its a real difficult task, but it surely has its results

K.J.T.

BE Chemical ( YD @ 2nd and 3rd Yr)

(Current Percentage : 64.26%)

Can you convert an Airsoft Bolt-Action sniper into an AEG?

1. no there is not a way to do that

2. why would you want to do that

3. its a BOLT ACTION sniper, meaning its not supposed to fire at fully automatic

4. the other guy who answered does no know what he is talking about

Bzero function in socket programming?

bzero: writes the specified number of null bytes to the specified destination.
bzero(char *dest, int nbytes);

How many kilos in 20 stone?

(1 stone = 14 pounds)

(1 pound = 0.45359237 kilograms)

So >

20 (stone) * 14 * 0.45359237 = 127.0059 kilograms (approx).

What year was the seesaw invented?

it was invented 1879 by jack fort. he invented it so kids would have somthing fun to do at school

Is Surface hardening better method to use or Annealing when these methods are used to manufacture products from ferrous metals?

These are two different methods that are opposites. Surface hardening is used to stiffen a steel. Usually a steel is heated, a catalyst is applied to the surface and then the steel is quenched in an oil bath or waterbath, this hardens the surface of the steel. Annealing on the other hand, the steel is heated and then allowed to cool slowly. This softens the steel and allows it to be drawn or hammered to form a different shape.

What is electrical tilt in GSM antenna?

Electrical tilt is a tilt which gives by knob present downward in GSM antenna.

It is done for effecting the coverage of antenna. If one GSM antenna overshoots then interference will produce.

then we give electrical tilt then front lobe will change and back lobe will not change.

so antenna provides coverage in both direction.

Electrical tilt is always gives in City.

It reduces interference.