How do you calculate the heat transfer thorough a cylinder with lower temperature on the bottom than on the top. the temperature of the ambient is 20 deg C, inside is 77 deg K, the bottom disk is 5 deg C. what would be the temp on the top?

Akshay Kulkarni

• Aug 4th, 2014

No formula at all.

Hint : Considering the effect of pressure difference with density, for a cylinder, it is not possible to have low temp. at the bottom part than at the topmost part.

So, the question asked here to check the basic knowledge about the fluid properties.

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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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how I can to cooling the water of Distillation apparatus cooling system? in other words I want to refrigerate the water that circulate around distillation source and Condensation the vapor.this water come hot and I want cool it with utilize the heat of Furnace.

ravi

• Mar 29th, 2015

Use Vapour absorption refrigeration system. Where the heat of the furnace can be utilized to separate the refrigerant and the absorbent in the generator. Refrigerant can be used to condense the vapour.

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what is cavitation? why it is occured and how it is occured ?

Vaibhav Jadhav

• May 15th, 2015

in flow system when the pressure of the fluid reaches below its vapor pressure, the pockets of bubble are form, this pockets of bubble when flows with the fluid and reached high pressure region,the fl...

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List the best Welding options along with parameters like Power, Voltage, Gas flow for MIG Wielding

Sibin Lakshmanan

• Aug 20th, 2015

Mig Gun,Wire feeder,Gas Regulator,Hoses,Elecrtodes

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How to calculate damping force in shock absorber?

deepak

• Apr 4th, 2017

Damping force is equal to multiplication of damping coefficient and velocity of damper.

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What is the difference between Pre-emtive and Non-pre-emtive Scheduling?

Koshy

• Jul 21st, 2016

NPE: First in first out.
Pre emtive depends on priority.

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What is the Shearing Stress of Al, Steel & Stainless Steel for tonnage calculation?

santosh das

• Oct 31st, 2016

Stress is directly propositional to strain with elastic limit and constant young modulus is different for different metals, so we calculate stress.

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When HVOF was present why engineers design HVAF?

Geraskin

 Profile Answers by Geraskin Questions by Geraskin

• Sep 5th, 2016

HVOF has great success in spraying metal and cermet coatings, but the process is a bit too hot for the tungsten carbide which leads to carbide loss during spray. HVAF has been developed to spray carbi...

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In which direction should a mill turn, throw up or in an approaching way between the pinion and the girth gear 

Ganesh ram.s

• Nov 1st, 2016

Usually ball and tube mills are working in the principal of Attrition ,Hammering

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What is the latest casting process used?

chandan kumar

• Aug 21st, 2017

The latest casting process is Injection Moulding System

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A piece of concrete has density of 2300 kg/m3 and is 400 x 600 x 3000mm thick. It is lowered into the sea by a crane for an underwater construction project. Determine the tension in the rope of the crane

(a) When the concrete is suspended in the air
(b) When the top is 1.5m above water,
(c) When the top is just below water, and
(d) When the top is 2m below water....

eiddy

• Jun 1st, 2017

a) The tension force equals the weight of the concrete = d*v*g (density, volume and acceleration of gravity respectively). b) Approximately the same result. c) Here there is an affective buoyancy fo...

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A bore of 14.46 mm diameter on a job can be measured by

victor

• Nov 1st, 2017

Vernier caliper

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Which refrigeration cycle is used in Air conditioning system?

Kimaya

• Dec 15th, 2017

Reverse Carnot cycle

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ajmeri.morvi

 Profile Answers by ajmeri.morvi Questions by ajmeri.morvi

• May 19th, 2011

a bearing which have line or point contact between two individual rotating case (named inner case and outer case) that's why lower the friction generate so it is called the anti friction bearing.ball ...

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Saurabh Lalwani

 Profile Answers by Saurabh Lalwani Questions by Saurabh Lalwani

• Jun 9th, 2011

It is basically a storage of some recorded conversations and radio communications which is used for accident investigations, as well as for analysing air safety issues, material degradation and aircraft performance.

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what are the type of air filters in engines ? What is the function air filter in ignition ?

velmurugan

• Jul 13th, 2011

1.mesh type
2.oil filter(filters are soaked in oil)

FUNCTION:it is used to filter the air from the atmosphere and remove unwanted particles

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