can we propel a rocket during its orbit around a planet using highly pressurised helium or nitrogen gas which would lessen the fuel consumption ?Or can we use it to launch a blastic missile?

Mrigank Mongia

• Sep 12th, 2011

I think i should work. if we take that the rocket is at a high altitude, it means its in a low pressure atmosphere or vacuum . If a ''high pressured'' gas released from the rocket, the gas will move...

navin

• Sep 9th, 2011

Ballistic missile... gases would get evaporated if we try to propel due to vacuum in space

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How does MPFI works? & explain me the mechanism of it? What is the purpose of it ?

Rajnish Kumar

• Sep 22nd, 2011

MPFI means Multi point fuel injection.MPFI injects fuel into the intake ports just upstream of each cylinder's intake valve, rather than at a central point within an intake manifold. MPFI (or just MPI...

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Sep 18th, 2011

MFIS stands for Multi Fuel Injection System. MFIS controls timing along with the amount of fuel that gets injected. In MFIS, air and the fuel is mixed just before the inlet. MPFI system injectors ar...

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Some of high class sedan cars have two silencers why is that so? Does it actually help in economy of car? how?

t240guy

• May 21st, 2012

The pressure of the exhaust inside the exhaust pipe decreases as it reaches the "silencer". This is because the silencer acts as a larger chamber for the exhaust to expand in. As the exhaust expands,...

Avinash Narode

• May 2nd, 2012

It is useful in V engines in order to reduce back pressure. but in others like in Mahindra XUV it is just for nice appearance.

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Pradeep Ingale

• Feb 19th, 2015

Every liquid has a vapor pressure ( the pressure at which liquid evaporates). If the suction pressure falls below vapor pressure of liquid , Cavitation occurs. Which results into vacuum creation & bub...

sushil

• Jul 14th, 2014

NET POSITIVE SUCTION HEAD

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Is Pneumatic cylinder used as a hydraulic cylinder, if so how?

Arvind kumar yadav

• Feb 27th, 2017

Like Hydraulic cylinders, something forces a piston to move in the desired direction. So we can use pneumatic cylinders as hydraulic cylinder with some modifications like a vessel for fluid storage, a...

Suriya

• Dec 5th, 2014

Pneumatic cylinder - Its being actuated with the help of air as a medium,instantaneous actuation and cant expel more load since its highly compressive load carrying is limited Hydraulic cylinder-Its b...

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What is the percentage of carbon present in pig iron?

Ayush agnihotri

• Nov 27th, 2014

3.5 percent carbon in pig iron

Rajat nakate

• Nov 4th, 2014

3.5 percent

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How we can adjust turbine shaft with turbine casting ?

Alireza khazaei

• Mar 1st, 2015

By Add or remove Shims in back of Thrust bearing

ahmad

• Feb 5th, 2015

By using bearings

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What is relative Humidity? Why it is used?

shaik samdani

• Sep 1st, 2015

Relative humidity means percentage of water content available in the atmospheric air. It is basically used where air-conditioning is required for example textiles industries, chemical industries, pharmaceutics companies &A/C halls etc.

P. Ramanarayanan

• Aug 19th, 2015

The relative humidity of an air-water mixture is defined as the ratio of the partial pressure of water vapor in the mixture to the equilibrium vapor pressure of water at a given temperature. It is measured using hygrometer

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Explain in detail about Entropy and Enthalpy independently

vikas rai

• Oct 9th, 2015

Entropy is how well molecules in a system are aligned.
Enthalpy is the amount of heat absorbed or rejected by the system.

BHARANIDHARAN SAKTHIVEL

 Profile Answers by BHARANIDHARAN SAKTHIVEL Questions by BHARANIDHARAN SAKTHIVEL

• Sep 21st, 2015

Entropy is the measure of disorderliness of a system. It is calculated by S=Q/T; &S=&H/T.

Enthalpy is the amount of heat content used or released by a system, H=U+PV.

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How to select the material of Pinion?

sourabh

• Sep 21st, 2016

Material should have good tensile and brittlness property.

manikanta

• Nov 2nd, 2015

Purpose [Power Transmission, Speed control] & Concentrated loads

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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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Why we do Product Audit?

vatsal

• Aug 25th, 2016

Product audit is required to increase the quality of product and reduce rejection as well as wastage of material used to make a product. Manufactured product meet the calculations on paper or not is also known as Audit. Product Audit - making sure product meets all specifications.

sivabalan

• Apr 30th, 2016

Its verification of process constainability and Quality.

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Why we do Layout Inspection of any product?

Dilip

• Aug 22nd, 2017

To efficiently utilize space without any wastage.

Kapil

• May 28th, 2017

We do layout inspection to ensure our product is as per customer requirement or not.

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What are the Efficiency of Gas, Steam, Hydro Turbines?

Prakash

• Jul 30th, 2016

Eiff =OP/IP

abdullah

• Jun 13th, 2016

(Q out - Q in)/Q in
the efficiency is the ratio between what we got over what we give. at any thing

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Explain What are the 7QC tools?

victor

• Nov 1st, 2017

Cause-and-effect diagram (also known as the "fishbone" or Ishikawa diagram)
Check sheet.
Control chart.
Histogram.
Pareto chart.
Scatter diagram.
Stratification (alternately, flow chart or run chart)

Felix

• Jul 21st, 2016

Check sheet
Histogram
Control chart
Paretto diagram
Cause and effect diag
Scatter diag
Flow chart

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Which type of heat exchangers are commonly used:
a. Counter current flow
b. Parrell current flow
c. Cross flow
d. All the above

Aitazaz

• Aug 8th, 2017

Counter current is mainly used in refineries to increase heat exchange but if we will talk about industrial scale like cooling towers then cross flow has the major importance.

Lalith

• Apr 9th, 2017

Counter Flow H.E. are mostly used. Because:
1. More heat exchange, with minimum medium of exchanger.
2. Less material requirement for production.
3. Can be utilized for small exchange purpose to High as required.

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SMAW means Sheilded Metal arc welding.

vrsaikumar

 Profile Answers by vrsaikumar Questions by vrsaikumar

• Nov 4th, 2008

There are 2 types of metal arc welding... shielded metal arc welding and unshielded... OR we can also say as protected and unprotected, metal arc welding...SMAW is the the welding process which shie...

harikumar

• Mar 6th, 2007

hiSMAW: Shileded Metal Arc weldingIn smaw , the welding will be done by using electrodes. The selection of electrodes will be based on Parent metal that we are going to weld and strength of the weld m...

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aakashpanchal

 Profile Answers by aakashpanchal Questions by aakashpanchal

• May 7th, 2010

R21 is C H Cl2 F, therefore R21 is dichloro monofluoro methane.

vrsaikumar

 Profile Answers by vrsaikumar Questions by vrsaikumar

• Nov 4th, 2008

Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon. It is a colorless and odorless gas. Its critical point is at 178.5 ?C (451.7 K) and 517 MPa (51.7 bar). At tempe...

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How to found pully size? how many type off pully? why we used pully?

subrat

• Oct 9th, 2014

Pulley is used for torque transmission from one shaft to another shaft .. If the shafts are parallel to each other. We use pulley for easy to transfer torque through the belt or chain.. Thank you

vrsaikumar

 Profile Answers by vrsaikumar Questions by vrsaikumar

• Nov 4th, 2008

Uses: Pulleys are one of the types of transmission devices which are used for transmitting power from 1 shaft to another shaft with the help of belts of ropes. Types of pulleys: 1. Cast iron pulleys2...

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Why are the stages being provided in Boiler Feed Pump?

kit_inton

 Profile Answers by kit_inton Questions by kit_inton

• Jun 19th, 2011

Boiler feed pump stages deliver high discharge pressure from pump to overcome the pressure inside the boiler drum and pressure losses from pipe connections, and also friction loss.

sudeeb

 Profile Answers by sudeeb Questions by sudeeb

• Dec 20th, 2010

Boiler feed pump is a multi-stage centrifugal pump where no of impellers more than one usually >3 . Depending upon the boiler working pressure pump will select. The pump should have high positive suction to avoid cavitation, usually take more than 10m. feed water temperature will be more than>65'C.

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