Why temperature decreases as we move heigher?

bibekananda sahoo

• Feb 10th, 2016

Rays coming from the Sun is only due to radiation and radiation doesn't require any medium. Thus it does not affect the upper atmosphere of the Earth so we feel the sun rays (i.e hotness) whenever it ...

rpatwa11

 Profile Answers by rpatwa11 Questions by rpatwa11

• Dec 8th, 2010

Volume of air is constant around our globe or in other words the earth can be considered as isochoric system. As we move higher and higher the pressure decrease and at constant volume the pressure is directly proportional to temp. as a result temp will also decrease 

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What is the energy required to break the material is called as?

Bhargav

• Jan 29th, 2016

A material withstands upto its shear stress. Beyond that, impact energy breaks the material.

S.Biswas

• Dec 27th, 2015

Energy required to break a material is specified as the modulus of toughness of that material.

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rajat singh shishodia

• Jan 22nd, 2016

According to me while design of an car we must look about the forces will act open it because forces act in 3 ways suddenly, continuously, partially after that the heat produced by the fuel and engine...

Bhushan Kulkarni

 Profile Answers by Bhushan Kulkarni Questions by Bhushan Kulkarni

• Aug 10th, 2011

In car Designing, it's airo-dynamic shape play important role.other factors are center of gravity,air drag,centrifugal force & many others.

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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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suresh

• Dec 19th, 2015

Advantages of increasing the CC is that the power of the engine can be easily increased, Meaning more volume of air fuel mixture is equal to more power. The other way to increase the power even withou...

Muhammad fassil

• Nov 14th, 2015

Higher CC engine consumes high fuel but is smooth in operations and engine last for more years. Whereas small CC engine can also produce power of higher CC even higher than that. Smaller engine works...

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I am a mechanical engineering student. I have always strong urge to make a device which can work as refrigerator and heater both. I have just started my project on this topic. My question is weather it is possible to make such device.

Himanshu Kumar

• Dec 20th, 2015

Technically NOT POSSIBLE but LOGICALLY POSSIBLE by combining a Heater coil with a refrigerator.

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What are the factors that a real life designer must consider for designing a car in terms of motion?

jyotish kindo

• Dec 16th, 2015

Ground clearance

SANDEEP KUMAR

• Dec 5th, 2015

Wheel Base

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Hydro testing is done with respect to which API Standard?

Deepan

• Dec 12th, 2015

API 598

Kathir

• Nov 9th, 2015

For power boilers: ASME sec I
For power piping: ASME B31.1.

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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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Name the types of power transmission elements with respect to drive ?

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Editorial / Best Answer

dibugwu ifeanyi  

 Profile Answers by dibugwu ifeanyi Questions by dibugwu ifeanyi

• Member Since Nov-2008 | Nov 19th, 2008

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Gear drive, Belt drive and Chain drive.

nikhil

• Nov 7th, 2015

Gear drive
Chain drive
Belt drive
Shaft drive

praveen

• Oct 17th, 2015

Power transmission
By V Belt
By Chain
By Gear
By Rope

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ismailrashwan

• Oct 31st, 2015

If electrical spark combustion cycle was uncontrolled that leads to (H,M) cases or if electric spark distributor was not adjusted.

nirmal

• Sep 10th, 2015

I could not understand whether inlet or exhaust valve opens all the time. Give me a clear answer

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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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Mohit sharma

• Oct 19th, 2015

Double Twin Spark Ignition

sathish Guru

• May 27th, 2015

Dtsi means digital twin spark ignition...this function used in bike engg capacity & mil &Rpm and all engg functions including

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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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What is hybrid vehicle? Where it is being used? How is it beneficial over the Ordinary Vehicle?

Kuldeep Janbandhu

• Oct 9th, 2015

A hybrid vehicle is a vehicle that uses two or more distinct power sources to move the vehicle for example a conventional internal combustion engine and also a high voltage electric motor.

NSK7777

 Profile Answers by NSK7777 Questions by NSK7777

• Aug 20th, 2009

A hybrid vehicle is a vehicle mostly that uses both electric motor and the engine as a power source. During idling---it uses only the engine power .During acceleration---it uses both engine and motor ...

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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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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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How does the cooling by air conditioning affect the relative humidity?

shaik samdani

• Sep 5th, 2015

Simply RH is calculated as difference between dry bulb & wet bulb temps. The difference b/w these more RH% is more, its less RH% is less. When we apply A/C to dry bulb, temp decreases so RH% also decreases.

rekha

• Dec 3rd, 2012

Relative humidity is ratio of mass of vapors in a given volume of air to the mass of vapors in the same volume at saturated point. With increase or decrease of % humidity or degree of saturation the relative humidity will be effected.

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Why we put 1st gear for move a rest car instead of 4th gear

shaik samdani

• Sep 3rd, 2015

To move any vehicle from stationary condition we required more torque over than speed, in 1st gear drive wheel is smaller than the driven wheel so more torque generates. But in 4th gear drive wheel bi...

MAYANK JAISWAL

• Mar 16th, 2015

Bcoze a car in REST need more TORQUE to move (larger dia. of gear provide this torque).

Its same as we need larger force to push any object from rest, as compare to force needed to b keep a moving object in motion.

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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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