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Engineering Thermodynamics

Engineering Thermodynamics
The unit of universal gas constant is

None of these

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Engineering Thermodynamics
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order

Dual cycle, Otto cycle, Diesel cycle
Dual cycle, Diesel cycle, Otto cycle
Diesel cycle, Otto cycle, Dual cycle
Otto cycle, Diesel cycle, Dual cycle

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Engineering Thermodynamics
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)

(T1/T2) - 1
1 - (T2/T1)
1 + (T2/T1)
1 - (T1/T2)

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Engineering Thermodynamics
The general law for the expansion or compression of gases, is

pvγ = C
pv = C
pvn = C
pv = m R T

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Engineering Thermodynamics
When coal is first dried and then crushed to a fine powder by pulverizing machine, the resulting fuel is called

Briquetted coal
Bituminous coal
None of these
Wood charcoal

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Engineering Thermodynamics
Isochoric process is one in which

All parameters remain constant
Free expansion takes place
No mechanical work is done by the system
Very little mechanical work is done by the system

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