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Engineering Thermodynamics

Engineering Thermodynamics
The gas constant (R) is equal to the __________ of two specific heats.

Ratio
Difference
Product
Sum

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Engineering Thermodynamics
If a system after undergoing a series of processes, returns to the initial state then

Process is executed in closed system cycle
Process is thermodynamically in equilibrium
Its entropy will change due to irreversibility
Sum of heat and work transfer will be zero

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Engineering Thermodynamics
The compression ratio is the ratio of

Swept volume to clearance volume
Total volume to swept volume
Total volume to clearance volume
Swept volume to total volume

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Engineering Thermodynamics
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

pv = mRT
pv = RTm
pvm = C
pv = (RT)m

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Engineering Thermodynamics
Properties of substances like pressure, temperature and density, in thermodynamic coordinates are

Real functions
Point functions
Path functions
Cyclic functions

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Engineering Thermodynamics
A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is

Cost will be very high
Not possible
May be possible with lot of sophistications
Theoretically possible

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