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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following processes is irreversible process?

Adiabatic
Throttling
All of these
Isothermal

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Engineering Thermodynamics
The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)

Q1 - 2 = dU/W1 - 2
Q1 - 2 = dU + W1 - 2
Q1 - 2 = dU - W1 - 2
Q1 - 2 = dU × W1 - 2

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Engineering Thermodynamics
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

Expansion and compression are isentropic
Combustion is at constant volume
Heat rejection is lower
Maximum temperature is higher

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Engineering Thermodynamics
A sudden fall in the barometer reading is a sign of approaching

Rains
Storm
Cold wave
Fine weather

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Engineering Thermodynamics
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as

Compound
Element
Atom
Molecule

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Engineering Thermodynamics
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

γ
1
∝

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