Explain the different between gate valve and globe valve?

1154

---

Explain the functions of paring disc and flow control disc in purifier and clarifier?

1228

---

Explain why self closing sounding pipes are used onboard?

1004

---

Define crankshaft explosion?

1205

---

What is center priming?

1059

---

What is the purpose of wearings in the centrifugal pumps?

1098

---

Explain the purpose of o-ring, wearings in the centrifugal pumps?

1155

---

Why plc require in analog input 4-20amp & 0-10 volt?

1155

---

What is the difference between mmwc and mmwg?

1401

---

Explain the difference between mmwc and mmwg?

5681

---

Explain why use mmwc unit?

1066

---

What are the types of valves?

1165

---

Where is wet leg is used?

1072

---

Define cryogenic?

1184

---

Explain why plc require in analog input 4-20amp & 0-10 volt?

1106

---