Answer Posted / phani

Bearing means which bears something, i.e. shaft.
and bearing has to allow smooth rotation to the shaft by
reducing the friction between bearing and shaft.

Suppose that there is a pump.
for any pump that is having casing, impeller.
impeller shaft must sit in the casing. so there is a gap
between impeller shaft and casing.
but pump is pumping some liquid.
if there is no sealing between this gap, whatever may be
rotational liquid, that will enter into the pump discharge
as well as into this gap.
so we are loosing some quantity of liquid.
To avoid this leak between casing and shaft, we have to
provide some sealant. that may be mechanical seal or gland
packing which will reduces this outer leak.
like this mech seals, oil seals also there to avoid oil
leak between oil sump and shaft.

if the blade height is increased,then how it increases the specific speed of centrifugal pump?

3502

---

What ill be the shaft diameter with clearance having a bearing bore is 30mm?

3301

---

What is the power requirement of a refrigerator?

1078

---

What will you do in case of scavenging fire

1959

---

Is the unit and normal value fuel ratio of an average diesel engine?

2300

---

wap to insert an element in array at a particular location

2290

---

What does following alloy designation indicate fg 250 ?

1357

---

What do you understand by fuel cycle in nuclear plants ?

993

---

Can any one send me the syllabus for RRB Chennai, for section engineer, mechanical. mail it to mail Id vijaymahantesh.sk@gmail.com

2047

---

describe a type when u anticipated potential problems and development of preventive measure.

1838

---

explain the mixture requirement of si engine to meet the demands of various operating condition?

2517

---

What is the purpose of gravity tank in the stern tube

3585

---

what is cyclon vibration effect in turbine

2001

---

What is the difference between hydraulic oil and engine oil?

1080

---

Why preferred Production than Drilling?

2738

---