Answer / richard marks

ph meters are calibrated using buffer solutins which are at
known ph levels. Make sure the probe is cleaned before
imerging it in the solutions.

Answer / satish

YOU CAN CALIBRATE IN THREE PHASE 4/7/9 PH BUFFER SOLUTION
NORMALLY WE ARE CALIBRATING WITH 4 & 9 PH BUFFER THAT MEAN
4PH--4MA/9PH--20

Answer / subhash

the Ph calibration is done by using the buffer solutions
,with the one probe i,e the reference electrode and the
measurement electrode ,,,,,,,,,,,,,

In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

---

i have D.p. transmitter of range 0 to 2540 mmWC, i want to use this for flow measurement (0 to 500 ltr/hr.) what should i do?

9 Answers  

---

what is the reason for flow fluctuations happen on differential flow transmitter during in service

2 Answers  

---

Explain about relays.. Can we give both AC and DC to the same relay... How it is energising.. Explain its working..

7 Answers   IOCL,

---

what is datum line?

4 Answers  

---

i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me

3 Answers   ONGC,

---

what is an ambient temperature?

5 Answers   Reliance,

---

Explain Difference between Bech set and operating range of control valve

3 Answers  

---

Question on maha cement

0 Answers  

---

if we have 380 KVA DG. how to calculate Power Factor. With detailed formula

1 Answers  

---

What is voltage regulator?

1 Answers  

---

what is function test.

1 Answers   Takreer,

---