Answer Posted / jahanzeb

isolators are operated at off load condition ... firstly
circuit breaker breaks the circuit .....

if isolated is operated at on load then flash or sparking
takes place due heavy voltages which shows hazardous effects...

so is use to minimize the sparking effect.... we can say
thay it is a slow switch and cb is the fast one ;-)

Contaminants of fuel oil

1950

---

which technology use in bikes

1992

---

When was the first space rocket built?

1238

---

how can we find the discharge pressure of the pump with the use of flow and NPSH?

1867

---

Does the rate increase by experience or number of years worked?

1023

---

What parameters to be reported when we send lubricating oil for shore analysis?

1895

---

Why should a chain drive be used over a belt or rope driven drive? State pro`s and con`s?

1152

---

What will you do in case of scavenging fire

1995

---

How is the gear ratio calculated?

1098

---

What is Rig floor..?

1540

---

sir i want model and previous year question paper of RRB. please send it to my mail id. im a mechanical engg.

2006

---

how can we calculate the size of bearing with the size of plummer block?

3119

---

Explain the cycle of refrigeration system.

2008

---

In order to increase efficiency and reduce co emissions and other emissions, clear coal technologies are receiving major attention. What are these ?

1046

---

what is the difference between anf & centrifuge?

2889

---