# Mechanical Engineering Interview Questions

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#### Capillary tube in Refrigerator & A.C.

How to calculate the length of capillary tube used in Refrigeration & A.C.?

• Nov 30th, 2019

Is 9 inch for 100 watt correct?
is it enough?

#### Nimesh Gajjar

• Sep 29th, 2016

Barensir, for referring this calculation which book I have to refer?

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#### Ajeet Singh

• Sep 12th, 2019

A device which supplies the metered spray of fuel mixed with correct amount of air for efficient combustion in cylinder at all operating conditions.

#### shaik samdani

• Sep 3rd, 2015

Carburetor is device its used to mix the air and fuel in correct quantity as per required fuel combustion of an engine.

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#### Pipe and Tube

What the difference between a pipe and a tube?

• Aug 20th, 2019

Pipe having structure round type but tube having rectangular,D type etc

• Oct 24th, 2018

Pipes are measured in NPS i.e. Nominal pipe size or we say nominal and not actual pipe size and Tubes are measured in actual diameter. Example: For 2 inch pipe its nominal diameter is 60.3 mm which ...

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#### Distillation Column, Heat Exchangers, Compressors and Pumps

Based on which law does distillation column, heat exchangers, compressors and pumps work?

• Jun 3rd, 2019

Distillation column, heat exchangers, compressors and pumps work works on the principal of first law of thermodynamics.

#### Unni Krishnan R

• Jun 1st, 2018

Raoults Law

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#### M.Sainath

• Nov 6th, 2018

Find the weight of plate 1000*1000*10 with having hole of 100mm sq,and also having a semi circular shape at end with radius half of the side of plate?
This was my interview question?
I failed to calculate the volume of semicircle.

#### y.prathibha

• Jul 17th, 2017

How to calculate weight for thin shells?

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#### Gear Train

Explain How gear train works?

#### PRAVINMUTHURAJ

• Jun 19th, 2018

In a number of gears train are fixed transmit torque or power in one shaft to another shaft. And the gear train is engaged and disengaged in parallel linear motion

#### rakesh8014

• Jul 5th, 2010

It consist of set of gears assembled together to provide a large range of speed variation to output shaft with limited range of engine speed.it will also provide required torque for different stages of operation.

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#### Refrigerator Tubes

In domestic refrigerator, What are the tubes at the back of the refrigerator called as?

#### Ian

• Mar 30th, 2018

What is the main water inlet tube called?

#### sudeeb

• Sep 17th, 2011

It is condenser coil assembly. The Pressurized, hot refrigerant from screw compressor will pass through this coil, heat transferred between the tube coil and the surrounding, as a result the refrigera...

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#### IC Engine Efficiency

With increasing temperature of intake air IC engine efficiency will increase or decrease? Explain

#### G.Hari pratap

• Mar 18th, 2018

In diesel engine efficiency increases due to increases of intake air

#### Shahrukh

• Dec 4th, 2017

If we increase temperature of intake air then volume of air is increased and hence density will decrease because of this pressure of inlet air is decrease therefore we does not get proper quantity of air to expands and hence expansion ratio will decrease therefore efficiency will decrease....

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#### Stiffness

If two springs of stiffness K1 & K2 are in series, the equivalent stiffness is.......................

#### deepak kumar

• Mar 7th, 2018

K1k2/(k1+k2)

#### MECHANICAL

• Nov 21st, 2017

K1+K2

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#### Meaning of Numerology on spanners and wrenches

When I see any spanner then always there is a number on its ends, like 10,11,12...

What is the exact meaning of that numbers?

#### Surendra Nath Singh

• Mar 4th, 2018

The number given on spanner is outer diameter of Nut and bolt in MM.

#### Jones

• Jan 21st, 2015

Its the Jaw size of the spanner.

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#### What is a four stroke engine

• Jul 14th, 2006

A 4-s engine is that in which for every four revolutions of crank one power stroke is produced.

#### sahid

• Jan 26th, 2018

Four stroke means suction stroke, compression stroke, ignition stroke, exhaust stroke of an engine.

#### Prabhu.s

• Oct 7th, 2017

Piston moves from top dead centre to bottom dead centre is known as a stroke its take half revolution of crank shaft. In a four stroke engine we get the energy on power stroke. Its complete two revolutions of crank shaft. The four strokes are suction, compression, power, exhaust.

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#### Samuel Carl Quarshie

• Jan 31st, 2018

A crank shaft is a specially designed shaft that transforms a reciprocating movement to rotary movement and vice versa.

#### srmyst

• Mar 25th, 2012

Crankshaft is a component of engine, which transmits power developed in combustion chamber to flywheel with the help of connecting rod. Reciprocating motion of piston is converted to rotary motion with the help of connecting rod which connects piston and crankshaft.

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#### Diesel Engines

Why heavy vehicles are made by diesel engine?

#### puneet

• Jan 23rd, 2018

It provide more torque

#### ravi

• Mar 29th, 2015

The compression ratio CR for petrol engine will be in the order of 8. The CR for diesel engine will be 14. So the pulling power / torque developed will be more for diesel engines. But efficiency is co...

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#### Vivek

• Dec 19th, 2017

Its possible on a 3 jaw chuck also. Because I just did. I machined a 1mm thick aluminium square pipe in a 3 jaw chuck lathe. I just held the 3 (of)corners of tube on three chucks.

• Mar 2nd, 2015

Square parts on a mini-lathe with a 4 jaw independent chuck It is not initially aparent to the new mini-lathe owner that they can make square parts on their mini-lathe. Using a 4 jaw independent ch...

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#### How many types of gear boxes are there?

bala

• Member Since Nov-2005 | Aug 2nd, 2008

Thare are 4 types of gear box.
1. sliding mesh gear box.
2.constant mesh gear box.
3.synchromesh gear box.
4.planetarty gear box.

#### chandan pandey

• Dec 11th, 2017

Three types of gear box: 1. Manual Gear Box:     a. Synchronous gear box.     b. Constant mesh gear box.     c. Sliding mesh gear box. 2. P...

#### Akshay Raut

• Nov 24th, 2016

1. Manual Gear Box:
(a) Sliding mesh gear box
(b) Synchromesh gear box
(c) Constant mesh gear box

2. Automatic gear box:
(a) Epicyclic gear box
(b) Hydraulic Torque converter

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#### Sudhir

• Nov 10th, 2017

It is the perpendicular distance from the axis of rotation to the point mass that gives an equivalent inertia to the original objects

#### victor

• Nov 1st, 2017

Gyradius refers to distribution of the components of an object around an axis

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#### Internal Combustion

What is means that petrol engine compresion ratio 16:1, Explain in detail

#### victor

• Nov 1st, 2017

The mass ratio of Air/fuel in the combustion chamber of internal combustion

#### suresh

• Dec 19th, 2015

The Compression ratio means the change in volumes ie. The volume of the cylinder at the Piston is at BDC (Bottom Dead Centre ) and the Volume when the piston is at TDC (Top Dead Centre) Example, Let ...

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#### victor

• Nov 1st, 2017

A stroke refers to the full travel of the piston along the cylinder, in either direction.

#### Ankit Sharma

• Dec 26th, 2015

Stroke=the drift or displacement or a blow of a substance under gentle pressure. In case of IC engine, the piston inside the combustion cylinder displaces no. of times depending upon the gas cycles. ...

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