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Thermodynamics

6

The value of one bar (in S. I. units) is equal to


A. 1 x `10^2 N//m^2`
B. 1 x `10^3 N//m^2`
C. 1 x `10^4 N//m^2`
D. 1 x `10^5 N//m^2`
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7

The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)

A. `1 - r^(Y -1)`
B. `1 + r^(Y -1)`
C. `1 - 1/r^(Y -1)`
D. `1 +1/r^(Y -1)`
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8
The mass of carbon per kg of flue gas is given by
A. `11/3 CO_2 + 3/7 CO`
B. `3/7 CO_2 + 11/3 CO`
C. `7/3 CO_2 + 3/11 CO`
D. `3/11 CO_2 + 7/3 CO`
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9
The polytropic index (n) is given by


A. `(log(P_1P_2))/(log( V_1 V_2))`
B. `(log(P_2//P_1))/(log( V_1// V_2))`
C. `(log(V_1//V_2))/(log( P_1// P_2))`
D. `log ((P_1V_1)/(P_2V_2))`
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10

Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

A. `C_v/C_p = R`
B. `C_p - C_v = R`
C. `C_v = (R)/((Y - 1))`
D. Both (B) and (C)
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