gaurav dhote

• Jun 6th, 2014

The twisting or turning force required to turn or twist the object is know as torque.

balakumara samy

• Jun 14th, 2012

Torque is the measure of how much acting on the object causes the object to rotate

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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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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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Why gas container are mostly in a cylindrical shape?

SARATH

• Sep 25th, 2015

Theoretically, a spherical pressure vessel has approximately twice the strength of a cylindrical pressure vessel with the same wall thickness, and is the ideal shape to hold internal pressure. However...

shubham Gupta

• Jun 18th, 2015

Due to stress distribution we made the shape of gas cylinder in spherical shape.

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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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Editorial / Best Answer

Stercus  

 Profile Answers by Stercus Questions by Stercus

• Member Since Dec-2007 | Aug 18th, 2009

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Akash, your FBD won’t work if you leave off external contacts – they need to be converted to force arrows. The buoyed object provides one such force: the buoyant reaction force.

You seem to agree that there is a force acting upwards on the test tube, appearing on the spring balance acting against the weight. As the test tube and the bowl of water are stationary, not accelerating, there must be an equivalent reaction force acting downwards on the body of water, imparted by the object. To go into more detail, the surface of the object experiences a pressure distribution from the water, gradated downwards due to increasing pressure within the water body. The net result from the pressure distribution is that the water pushes up on the object (buoyant force). To avoid being crushed, the object pushes back against this pressure in all directions – so again you get net a reaction force in the opposite direction, downwards.

So the FBD of the water body needs a reaction force to account for buoyancy. This reaction force acts downwards, from the centre of the displaced volume and is equal to the weight of the water displaced. The weight of the object immersed doesn’t need to be considered as this is supported but the weight of the displaced volume of water does.

PRASHANT

• Oct 16th, 2011

It will not change the reading..... Lets take a simple case... A water flask is putted on a weight balance and a rod is immersed in it which is tied to ceiling with help of a rope. The tension in the...

akash.2929

 Profile Answers by akash.2929 Questions by akash.2929

• Aug 18th, 2009

Stercus, u r correct!! :) thnx :)

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Why do we use solid shafts for transfer of power in case of pumps/ turbines & other machines why we use a hollow shaft (pipe) in universal joints of automobiles; although the rated load and twist is approx. the same.

Arun Govind Neelan

• Feb 27th, 2012

In automobile application we have to consider weight in addition to torque and strength. Hollow shaft has high torque transmitting capacity per unit mass compared to solid shaft. If you consider bending stress diagram for hollow it is min at centre so material requirement is minimum at centre.

ravindra sariya

 Profile Answers by ravindra sariya Questions by ravindra sariya

• Feb 16th, 2012

In case of turbine and pump there is an axial component of force present so solid shaft can deal better than hollow shaft...and in automobile only pure torsion is present and also hollow shaft have le...

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nasser khattab

• Nov 8th, 2015

Procedure to operate a pump open inlet valve but for outlet valve (open or close) changes due to pump type. If it is a centrifugal pump then close outlet valve and after run then open it slowly. If it is a displacement pump open outlet valve before run the pump.

karthik

• Sep 6th, 2015

Check suction valve and discharge valve are open then check oil level and start the pump switch.

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pand

• Sep 5th, 2015

DTS-i which is stands for Digital Twin Spark Ignition. If we using this engine the fuel efficiency will increase. So we get high speed.

lavi bhardwaj

• Oct 20th, 2013

Dtsi(digital twine spark ignition )engine
is used for better combustion of air and fuel mixture.it is only available in bajaj automobiles.

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Sanjay

• Sep 10th, 2016

We will be familiar with the words MPFI and CRDI in the advertisement of some vehicles. But we will not be aware about these terminologies. The MPFI is otherwise known as the Multi point fuel injectio...

bhanu tomar

 Profile Answers by bhanu tomar Questions by bhanu tomar

• Oct 6th, 2012

MPFI means multi-point fuel injector. Latest 4 stroke and 4 cylinder engines consists of MPFI system which enables them to inject fuel at each cylinder at a single time.

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What the difference between a pipe and a tube?

Sadil saifi

• Aug 20th, 2019

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

Sagar Kurhade

• 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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Which is more elastic - Steel or Rubber?

Pankaj

• Oct 31st, 2012

Elasticity is the property by virtue of which body regain its original shape and size after removal of external force.

LDK

• Oct 29th, 2012

Steel have a more elasticity then any other material

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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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What will happen by pouring diesel in petrol engine instead of petrol ?

aNKIT

• Dec 23rd, 2015

1. Diesel needs high ignition temp. to burn. If diesel compatible ignition provided to spark plug in the IC engine of petrol, combustion will definitely take place but only for one cycle and the whole...

gokul k

• Jun 26th, 2014

The ignition will not happen as diesel requires a large compression ratio. but the petrol engine will not have a sufficient pressure difference to ignite the diesel

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Ranvijay

• Aug 13th, 2017

Stainless steel and Mercury

saroj

• Dec 22nd, 2016

Vanadium

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Why is the ice maker placed at the top of the refrigerator?

Vikrant Singh

• Oct 25th, 2012

Due to maintain the convection in refrigerator. When air is cool in refrigerator it moves downward and hot air moves upward because cold air is denser than hot air this phenomena is called as convection, so movement of air take place regularly.

Mallayya S M

• Oct 12th, 2012

In every refrigerator have the cooling place at the top order because the coolants have the high temperature as compared to outer means earth then it could have there is possible to happen become low temperature also not comfortable to user.

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sandeep

• Nov 15th, 2017

In first angle - the object in between observer and plane of projection
In third angle - the plane of projection in between observer and object

victor

• Nov 1st, 2017

In first angle, the object is in 1st quadrant, in third angle, the object is in 3rd quadrant.

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What will happen if diesel is used instead of petrol in Si engine?

Navneet singh

• Oct 19th, 2015

The self ignition temperature of petrol is lower then diesel and also we know that compression ratio of a diesel engine is very high as compared to petrol or SI engine so petrol ignites readily in CI ...

AJAY MISHRA

• Aug 25th, 2015

SI engine does not work with diesel but will be knocking apply petrol in CI engine.

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What happens when we close the valve in discharge line while the pump still working?

eiddy

• Jun 1st, 2017

Water hammer phenomena takes place due to the pressure rise.
Closing the valve suddenly causes revers flow (reaction flow) may damage the pump or elbows if exist.

pawan kumar singh

• Nov 1st, 2016

When the discharge valve is closed in the running condition of a pump then the friction between pump impeller and liquid generates heat which increases continue and hence the fluid gets vaporized which causes problems of cavitation.

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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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