# GATE Mechanical Doubt Questions

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devlop the

equation for the amount of fuel injected per cycle in terms of brake horse power and speed of a four stroke CI engine.

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Substance is flowing in a pipe of 200 mm inside dia at an avg velocity of 3m/s. At a given section of the pipeline the pressure is 1.5MN/m^2 absolute. What is the flow work of 0.5 cubic meter,expressed in joules passing this section ?            Guys please tell the formula to be used.

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https://telegram.me/ese2017_mech Pls join this group. Which help peoples who studies alone . Simply click on url people can join this channel

https://telegram.me/Ese2017_mech

Pls click this link to join group

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If 20 kJ are added to a Carnot cycle at a temperature of 100°C and 15 kJ are rejected at 0°C, the location of absolute zero (in °C) on the celsius scale is ?

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A gas undergoes a reversible adiabatic compression from 0.5 MPa, 0.2 m3 to 0.05 m3. It follows the law PV1.3 = constant. What is the change in enthalpy during the process?

223.30 kJ
446.60 kJ
884.30 kJ
1246.30 kJ

Somebody solve this with explaination. Thanks

@shivamnanda  ·  15 karma

Gotcha! (y) but How do we get this area below curve?

@maniaccet  ·  0 karma

Ans

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Third law of thermodynamics?

@abhi33  ·  6 karma

@shivamnanda  bro entropy of only pure crytalline body at absolute zero is 0.... but entropy of solid solution at zero kelvin is not zero

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@shivamnanda  ·  15 karma

thanks! for the correction mate.

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plz tell abt interview of npcil?

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Anyone who is having doubts/troubles in a question may post it over here. I'll try to solve it ASAP if I could. Other members also can solve the same voluntarily.

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