Answer / kp

AC Drve operative for following features.
1.it is safty for motor.
2.energy saving.
3.Braking
4.costing/ramping.
5.easy to understant where is fauilure.
6.interlocking according to loop for Speed refrencr.
7.control V/F

Answer / stouhidee

At which the drive is use without any damage at its max.
efficiency.

If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used? Please tell me its Calculation formula.

5 Answers   MOL,

---

What are the advantages and benefits of using PLCs to automate a section of a plant?

2 Answers  

---

How to calibrate radar type level transmitter for interface level? Total liquid(liq.1 and liq.2), level both the liq individually? For. Both the liquid levels how the signal will go from transmitter to dcs? How to calibrate. Single radar 9:26:55 AM for 2 different liquids in a tank?

0 Answers   Almeer Technical Services,

---

What are SMART insuments?

5 Answers  

---

1.what is beta in control valves? 2.what is the condition followed by light in LASERs? 3.1kg/cm2=?psi 4.Integral action reduces what? 5.about vena contracta 6.a simple RC circuit 7.thermistor material's temp coefficient of resistance 8.if wave passes through the thicker area of a chord to a thinner area what changes will occur to wavelength? 9.if 4-20 mA represents 0-10 kg/cm2 what will be the current when pressure is 5 kg/cm2.................

0 Answers   Lurgi,

---

Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com

0 Answers  

---

1. How many output signals do wew have in process control? 2. Could you write down the names of the pre-commissioning and commissioning stage test instruments and explain them (more than 5 items)? 3. What is the first step to commission a transmitter on service? 4. What is RTD? 5. Find the output value in MA of a temperature transmitter (RTD Type) at 120degree celius? 6. What is the O/P signal of a pneumatic transmitter? 7. What is the O/P signal of an elctronic transmitter? 8. What is the close loop and open loon?

4 Answers  

---

how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

1 Answers   Yokogawa,

---

Q- In the process of checking AC through Phase Tester our body is the part of circuit but we don't recevie Shock, Why ?

2 Answers  

---

Explain how thw analog to digital converter works with the circuit diagram

0 Answers  

---

how to calibrate Necleuonic level transmitter.?

0 Answers  

---

why the discharge pressure of ID fan showing negative at fan running condition.(boiler operating condition.)

5 Answers  

---