Interview Questions Answers in Mechanical Engineering

Question { IOCL, 8621 }

What is the effect of pump installation in series and parallel connection.

Answer

Series connection: More Head at constant Flow.

Parallel connection: More Flow at constant Head.

Is This Answer Correct ?

53 Yes

2 No

Question { Keihin Fie, 4003 }

two shafts should have same strength?
a)dia b)same material c)angle of twist d)twisting moment

Answer

Ideally YES.

Is This Answer Correct ?

0 Yes

0 No

Question { ABSC, 5863 }

what roal of balancing disk in boiler high preesure feed
pump.

Answer

Role of balancing disk in high pressure Boiler Feed
Pump is to "Reduce the axial load on Thrust Bearing".

Is This Answer Correct ?

1 Yes

0 No

Question { 7684 }

Why air is not used to run the turbine?

Answer

Air - There is no Wide span of Pressure & Volume relation.

Is This Answer Correct ?

3 Yes

0 No

Question { 12887 }

Defference between tapper & ovality

Answer

Taper: Concentric about its axis.
Ovality: Eccentric about its axis.

Is This Answer Correct ?

9 Yes

2 No

Question { 3551 }

who knows that in stem turbine:steam enter to impulse
blades or reaction blade at first(rotor blade sequence)

Answer

impulse blades.

Is This Answer Correct ?

3 Yes

1 No

Question { SSB, 6066 }

difference between i c an ci engine

Answer

As such the Question is Invalid.
The question must be either
"Difference between IC and EC engine"
or
"Difference between CI and SI engine"

Compression Ignition (CI) is a part of Internal Combustion (IC)

Is This Answer Correct ?

4 Yes

1 No

Question { 4508 }

ice can float on the surface of water?

Answer

Ice can float partially on the surface of water, because it has its Mass.

Is This Answer Correct ?

2 Yes

1 No

Question { 6040 }

What is the purpose of
jockey oil pump in
turbine.generator..????

Answer

Purpose of jacking oil pump in Turbo Generator is to keep the Rotor in floating condition during slow speed requirement for uniform cooling (during shutdown) and uniform heating (during Start up).

Is This Answer Correct ?

4 Yes

1 No

Question { 4060 }

What is meant by stages in
turbine....what is there
purpose....????

Answer

Stage is a set of Fixed & moving row of blades.
Fixed blade act as guide or as Nozzle. Moving blade is a mechanical energy imparting member.

Is This Answer Correct ?

4 Yes

0 No

Question { 2512 }

How to calculate the CFM in
the AHU (air handling units.

Answer

The cross-sectional area of the duct (A) X Velocity (V) of air.

Is This Answer Correct ?

0 Yes

0 No

Question { 2648 }

What i the role of a turning gear attached to a shaft line of a steam turbine

Answer

The role of turning gear in Steam Turbine: To rotate rotor in low speed for the following purposes:
1.To Warm Rotor uniformly before start up.
2.To Cool Rotor uniformly after shutdown.
3.To reduce the initial Torque during start up.

Is This Answer Correct ?

3 Yes

0 No

Question { HPCL, 4233 }

What is the function of rocker arm

Answer

Rocker arm is to transfer the movement from Push rod to valve stem.

Is This Answer Correct ?

1 Yes

0 No

Question { Engicon, 3549 }

what is the main differance betn id & fd fan

Answer

ID Fan: It handles high density flue gas.
It's Vane angle is more.
It works as an Exhaust Fan.

FD Fan: It handles Fresh Air.
It's Vane angle is less.
It works as a Supply fan.

Is This Answer Correct ?

11 Yes

0 No

Question { KFCL, 7715 }

What happened when Delivery valve closed and Suction valve open in centrifugal pump.(in running conditions)

Answer

Pump will run with Shut off Head. Pump will not be healthy, if run with Shut off Head for loner duration.

Is This Answer Correct ?

4 Yes

2 No

abdul hameed